Flushing & Replacing Engine Coolant in a BMW/MINI

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All of the items shown in these videos are available in our online store at www.bavauto.com/. Need additional tech help? Please visit our tech blog for thousands of Tech and DIY BMW and MINI articles at: blog.bavauto.com/
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Parts Used:
BMW Coolant:www.bavauto.com/82-14-1-467-704
Distilled water (local grocery store)
Tools Used:
Metric Socket Set; www.bavauto.com/cta10100
Form-a-Funnel: No Longer Available
Spill-Free Coolant Funnel: www.bavauto.com/b8800082
Garage Guard Absorbent Mat: www.bavauto.com/catalogsearch...
Coolant Drain Pan (New Improved Black pan): www.bavauto.com/b8800011
6mm flexible hose clamp driver: www.bavauto.com/b8800073
Bentley repair manuals: www.bavauto.com/tools-manuals...
Floor jack and jack-stands, ramps or vehicle lift
Metric combination wrench set (8mm through 17mm)
Flat head screwdrivers
Phillips head screwdrivers
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The coolant flush is not especially difficult, but it does require more than simply removing the radiator drain plug. In this video we will demonstrate a coolant flush and change on a typical BMW with a later model 6-cylinder engine. The procedures shown can be applied to most BMW and MINI models. In our example (2002 E53 X5 3.0i), we'll show the specific steps to properly drain and flush the system, then fill and bleed with new 50/50 mix of distilled water and coolant. Watch the video and see the parts and tools used, below. For further assistance, please contact our agents at 800-535-2002 or visit our online store at bavauto.com.
The Bentley repair manuals will cover model specific points, torque values and fill quantities. This DIY will assume that the DIYer has the applicable Bentley manual for additional references.
Our BMW and MINI cooling systems have the thankless task of dissipating the heat generated by our engines (and automatic transmissions), keeping them at an optimal operating temperature; not too hot, not too cool. In addition, the cooling system must keep corrosion and sediment from attacking the metal, plastic and rubber parts of the systems. Like the engine's lubrication system (oiling), the cooling system must function mile after mile and hour after hour for hundreds of thousands of miles and thousands of hours. Faults within either of these systems will typically result in catastrophic failure and potentially terminal engine damage. With these thoughts in mind, we can begin to understand why regular maintenance of the engine's cooling system is just as (or more) important as the other regular maintenance tasks that we perform on our BMWs and MINIs.
We recommend a coolant flush every two to three years if using the BMW/MINI coolant and distilled water (more often if other coolant or "tap" water is used). While the base Ethylene Glycol (EG) Antifreeze/Coolant (basically) holds its antifreeze properties for a very long time, the additives for corrosion protection, lubrication, etc, do not. The recommended 2-year interval is due to the Silicate anti-corrosion additives that are "used up" and begin to drop out of solution after about two years of service. When this happens, silicate build-up can happen within the radiator, heater core and engine passages.
When adding coolant, between flushes, always add the same coolant as the original fill. While adding a common green, orange, yellow or other, coolant (which have differing additive packages and base pH) will not immediately destroy your engine or cooling system, it will reduce the effectiveness of both the base and the added coolants. This will, at least, greatly reduce the service life or, at worst, start a corrosive cycle.
We mix the coolant with the distilled water in a 50/50 ratio. Using distilled water for your 50/50 mix is not specifically required, but in doing so, your coolant mixture will be much more stable and far less corrosive in the long term. This is due to the absence of the minerals and impurities that are removed in the distillation process. These impurities encourage electrolytic corrosion to the engine block, cylinder head, hoses and gaskets, damaging these parts and causing failures and need for repairs.
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All products noted in this video can be purchased in our online store, www.bavauto.com/, 24 hours a day, 7 days a week. You are also welcome to e-mail us at info@bavauto.com or call into our headquarters and speak to our knowledgeable advisors at (800) 535-2002 (Mon.-Thurs. 8AM to 9PM EST, Fri. 8AM to 7PM EST, and Sat. 9AM to 4PM EST).

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2 авг 2024

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Комментарии : 282

@Winterever 4 года назад

IMPORTANT: It is a closed/sealed system. There’s a final step not shown here when the expansion tank is full, which is to remove some fluid until the float (stick bobbing out when he removed the funnel) is between its maximum and minimum mark. Otherwise, the expansion tank won’t be able to perform its purpose to allow space for coolant to expand as its temperature rises, and avoid over stressing the cooling system.

@sepehrfadaei7564 3 года назад

Thank you for your great video. Here are a few things that I learned in the process that I’d like to share: - After engine overheating and coolant boiling (due to a failed radiator fan in my case) I had a lot of air in the system. - As mentioned in the video, at the beginning of the process of bleeding, the car overheated again (temperature gauge reaching 3/4) and I needed to turn the engine off, bleed, and turn it back on a few times (Thank you for this hint!!). - With all the fluid level fluctuations, I couldn’t do it without a spill-free funnel. (Bav Auto or ABN brand work, threads don’t match the coolant reservoir perfectly, but it works.) - I also suggest replacing and using a brass bleeder valve. - Even after the temperature stabilized with the engine running, I was able to bleed more air, by turning the engine off (water pump off). The fluid level came way up in the funnel, and then I opened the bleeder and a lot of air came out. - Some videos talk about bleeding with the engine off, and just switching the ignition on, using either 1) heater auxiliary water pump, or 2) Activating bleeding cycle by pressing the accelerator pedal for 5/10 seconds. If your car has either of those options, it will simplify the process, by it was not an option on my 2006 X3 E83 (M54 Engine), so I am grateful for this video. - I had error code P2184 (Temperature sensor 2 low), which didn’t come back after filling and bleeding the coolant. - Check coolant level again later when the engine is cold.

@orpiv 3 года назад

Really miss Bav Auto ..Hate that they are gone!

@willk3807 4 года назад

I've watched 5hrs of coolant flush videos. This was the most helpful. Thank you

@walletphonekeys 4 года назад

I'm scared of doing it

@lazarus6314 3 года назад

@@walletphonekeys did it go well

@simonjoshua4474 6 лет назад

Hi. Great videos and learned a lot. I think someone commented already but this is important. The expansion tank does NOT get filled right up. Always remove coolant once done bleeding to right level. That's the indicator just to top of bottle. Use a pipe or turkey baster to remove coolant. Then check after driving a few times.

@JohnFaire 6 лет назад

Simon Joshua Agreed. It's good practice, and safer.

@VincentMMoore0 3 года назад

So helpful! Especially the flushing and bleeding process. Great method to ensue that inside the system one ends up with an actual 50/50 mix.

@maxwelltengbeh2894 10 лет назад

thank you for all the videos. I love them all. Max

@amishware 10 лет назад

Just to point out on sentence 'Normally, one time is plenty' at 5:30. I flush my system 4 times with destilled water until i got clean water. Heater was set to max, and both engine block and radiator drain plug were drained. Thermostat is the key. It remains closed until temperature is high enough. If you don't have patience and time to flush many times like i do, there is better way which ensures total system flush (without old coolant in the system). - Warm engine until radiator fan turns on (Thermostat is opened long before this happens but wait for it just to be sure). - Flush cooling system from both engine block and radiator until thermostat is opened. This step is crucial and most dangerous, because coolant is still very hot. I recommend using gloves and extended tools for opening drain plugs. - If this is first flush of old coolant, additional flushing with destilled water (again while thermostat is opened) should be plenty, and guarantees clean cooling system. - Now it is ready to fill with 50:50 mixture.

@tonea7489 5 лет назад

Great job describing and really taking this headache apart! Will be apprehending my 09 135i N5r with these tactics 👍👍

@mjrgroup 11 лет назад

Otto and BAV are just superb and a great resource for all car owners.

@pianothatilove 4 года назад

The best video showing how this is done on RU-vid as off today!

@sonofachicken 2 года назад

This is the only proper video I’ve found explaining the process with the block drain as well, cheers!

@erichaff7567 4 года назад

Great video. Very helpful. We sure miss you guys at BavAuto...

@banshee511 11 лет назад

Thank you so much for the detailed diy! One question: do you need to bleed the system if you are just topping up low coolant?

@pharaohlandscaping 9 лет назад

Great video thanks, do you sell just the cap adaptor for the funnel ? I own the funnel and an adaptor for Nissan but need a BMW adaptor now You are the only one actually running the car to bleed which is the right way to do this

@SasquatchGuitars 10 лет назад

Auto, your videos are flawless! I just wanted to let you know you're doing an awesome job. Great DIY's.

@bavarianautosport 10 лет назад

Thanks for the good words, Justin!

@JAMAEL89 8 лет назад

Thank you again. Give me the courage to do this on my own. Saved money and time.

@lHASANl 12 лет назад

Just Amazing, I Love BavAuto.

@Haxxorfreak 11 лет назад

Great video, very helpful as always. Thanks for doing these!

@Noelg14 7 лет назад

doing it now wish me luck if i cant get a hold of bmw coolant what would be another certified coolant i could use?

@bavarianautosport 11 лет назад

Over filling is not a problem. As the system heats up and the fluid expands, any excess fluid will be vented through the overflow (via the cap's pressure relief valve).

@ELI-go8pp 7 лет назад

thanks Otto. very informative. very precise in the details.

@vcb1202 11 лет назад

hello otto, thanks for the video. i have a 2004 530i and would like to ask if venting is the same as in the x5 used on the video. can't find a bleeder screw in my car. also planning on using the Evans NPG waterless coolant. how do i make sure that all water is completely drained before putting in Evans NPG coolant. hope to get answer by monday(Dec 17) to take advantage of free shipping. thanks

@a-ps9347 6 лет назад

Thanks a lot Bavarian Autosport!

@meedka 9 лет назад

Thank you for the video, its great to have professional help on these vehicles. I am a new owner of a 2000 BMW 323i for about 3 weeks. During researching the car before purchasing it, I saw that the cooling system is a weak point so I have done a complete cooling system overhaul. New radiator, water pump, thermostat, expansion tank, hoses, and temperature sensor as well as the coolant level sensor. After bleeding the system over a couple of days (allowing the engine to cool down overnight and adding fluid immediately in the morning) my coolant level light comes on after the car warms up indicating low coolant. I have read that overfilling the expansion tank can cause it to rupture prematurely so I have only added fluid to the COLD engine to where the coolant level bobber just hits max. Although the plastic bobber mechanism is slightly covered with coolant I can clearly see the mechanism through the fluid. I noticed that you filled the expansion tank to the rim when hot which would equal about halfway when cold. My long winded question is can you explain proper coolant level inside the expansion tank. Thank you.

@bavarianautosport 9 лет назад

You're fine to fill the tank close to the top. This will not cause the tank (or anything else) to crack. As the coolant expands (as it heats up), the excess will be expelled through the overflow, via the pressure release in the cap. This would be normal. Sooo ... just fill it up and let it find it's own level as it gets to running temp. People that have talked about overfilling and cracking tanks or whatever, have simply experienced coincidental failures. The only other possible point would be a cap that has a faulty pressure relief valve that is "stuck closed".

@gameb0y86 11 лет назад

Is there two drain plugs on the 325i e46? I am about to do this on my car soon.

@LIOTBs 5 лет назад

Thank you for all the great tips and insight, however I don't see the block drain plug you describe. I have a 2001 x5. I have the M54. Could I get your help making sure I find it? Also, how hard should it be to remove? Thank you!

@bavarianautosport 11 лет назад

If you do not have the system "full" you may have temperature issues. When you check the coolant level in the reservoir, how far down is the coolant? What model do you have?

@brandonellis1902 10 лет назад

I may not own a bmw but i find your procedure very useful. I actually used this method on several of my friend´s vehicles from a chrysler to a Nissan. My house has very hard water and i was concerned aboout doing a traditional garden hose flush. It never occured to me to fill with distilled water and drain again. Saved my buddies and i allot of money as well. Distilled water is allot cheaper than pre mixed coolant off the shelf.

@bavarianautosport 10 лет назад

Glad to help. Our BMW & MINI customers and owners may have other vehicles as well, and these procedures can be applies in a general way to any make/model.

@325xitgrocgetter 11 лет назад

Very informative but I have a question...is it possible to overfill the expansion tank? Should a gap be left based on what the "bobber" is showing?

@navinpreethpaul3921 3 года назад

Excellent video

@MrKingDelight 8 лет назад

Great video! I was not able to add more than 5 liters (5.2 Quarts) after the flush before the system was full on the M54 engine which should take 8.4 liters. First I did this with DEMINERALIZED water, only 5L could go in. Then drained, then again with water and then with the coolant (Croon SP11 already mixed coolant). The car was level on a car lift. Two questions: 1. Is is possible that there was still 3 liters left in the car? 2. Is it an issue that there are probably remains (3 liters) of the DEMINERALIZED water in the system?

@jongkeunlee 7 лет назад

Hi Otto. In case of e46, do we need to empty the expansion tank coolant ? If yes, How? remove and empty it or suck it up with pump? thanks

@andyflorianescarate 6 лет назад

I have a 2009 BWM X5, would you know where can I get a Repair Manual?

@bavarianautosport 11 лет назад

What engine do you have?

@mjkay8660 8 лет назад

if i had blocks i could do it! and im not used to this, got one on mini air conditioning and radios?

@yadrianromero2408 11 лет назад

One last question. I recently replaced the water pump and thermostat and housing. I ran out of coolant so I have been running straight water in it . Now my question is after every few days or so I open the expansion tank cap and the fluid level goes down so I have to be adding. Is this normal with water because it can boiling ? I've checked for leaks and can't find any. No overheating issues either .

@Deltanova93 7 лет назад

Hi BavAuto, nice video. I have a question though. You also have a drain plug on the engine block. How man Liter coolant is storaged in there? And does that drain plug have a specific "pattern". How is it recognizable? Is it highly recommended to open that plug as well? Or will the drain plug on the radiator do? Thanks in advance

@sandrapermande2046 11 лет назад

What other coolant can u use if you don't have BMW coolant thanks

@bigbore400 9 лет назад

Once finished and radiator cap back on...if there's any more air in the system will it find it's out by itself through regular driving...or is it sealed in there ?

@bavarianautosport 11 лет назад

To some degree, yes. As the coolant expands (as it heats up) it will spill over if the system was filled to the top when cool. Also, the bleed/return hose to the expansion tank may be splashing out of the cap opening (can happen on some models). Do your final bleeding with the cap in-place.

@adrianedhouse5175 7 лет назад

HI, sorry if this has already been asked, but did that Spill Free funnel come with the correct attachment for the BMW or did you need to adapt/source a part somewhere? I'm based in New Zealand and looking to purchase via Amazon so don't want to get something shipped all the way here just to find I can't fit it to my 2005 318i (with the N46 engine). Cheers.

@scotcook5 7 лет назад

Thanks for all the vids. I have a clicking sound every 10 -20 seconds as the car idles at temperature. Could this be the thermostat opening and closing ? M54 with 38K miles. Would this indicate an issue with the Thermostat if I am correct? Thanks for your reply

@felixkolapo2211 9 лет назад

Thanks for the video. Where is the bleeder for 2002 318i (e46) located. I will like to carry out this operation myself. Thanks

@lchai7012 8 лет назад

is it a good idea to use a bottle of flush and cleaner for the job?

@armenianman5826 11 лет назад

i have 1999 bmw 323i. how much of torque inch lb i should tight bolts on water thermostat to the engine block??

@damonmattheus5981 9 лет назад

Keep making those videos. Aloha Otto, thank you for your time to help us guys on the correct way to do this. Would you consider doing videos on 2003 Z4's?

@bavarianautosport 9 лет назад

Thanks! As for the Z4 specific DIYs; we need to consider the overall usage each of the videos that we produce. Most of what we do can be used and adapted to your Z4. However, tasks that are specific to a Z4 model may not be covered well by our videos. Hopefully, Bentley Publishing will have a Z4 manual soon!

@jodyjody6297 6 лет назад

Can you post pic of the exact amount of distilled water equalling 5 quarts along with the exact same thing for the BMW blue coolant...I got the full gallon in initially, I'm not certain upon second gallon amount to equal 5 quarts coolant. Thank you Ty

@bavarianautosport 11 лет назад

Yes, this general process is what you would do for any vehicle.

@desertsonne 9 лет назад

This is a great clear explained video and easy for us "non mechanics"

@Angelsanchez-ct6oc 7 лет назад

desertsonne

@franco804 7 лет назад

Excellent videos. Although I've never owned or worked on German cars, this will definitely help out when I pick up my E90 330i. Thank you.

@DigitalDissident 4 года назад

Im subbed to you. Hello

@unigateman 11 лет назад

DO YOU HAVE ANY VIDEOS ON HOW TO CHANGE RADIATOR ON BMW MINI ,,

@patewing5808 11 лет назад

I have to replace thermostat , is it problem if I take out coolant from radiator and not from engine block . Thanks

@matthewcunningham5765 9 лет назад

Great Video!

@sd9634 6 лет назад

Nice work!!!

@See-5 9 лет назад

Hi, What do you think about replacing the original thermostat with and aftermarket one in order to reduce the coolant temperature (Since I am assuming that the thermostat cannot be adjusted) ? My car is 2008 750li and the coolant temperature reaches 113 Celsius while stationary, I drive in areas reaching an outdoor temperatures as high as 50 Celsius and I am using 50/50 water+coolant mix (I guess it should not exceed 100 Celsius so that water doesn't evaporate) The high temperature result in damaging most plastic and rubber under the hood.For example, the reservoir now needs to be replaced as its plastic got damaged from the excess heat and it now allows coolant to leak through it. Also the cabin filter boxes plastic broke into pieces. I discovered that most of the plastics in the hood cannot handle such heat. Please help me with your suggestion to reduce the engine heat, keeping in mind that there are no problems in my cooling system and this is the factory set temperature range,thanks a lot in advance :)

@bavarianautosport 11 лет назад

That's fine for replacing the thermostat (or water pump, etc.), and then just refilling. However, if you are planning to flush the system at the same time, you will still have a good amount of old coolant in the engine if the engine block drain plug is not removed.

@bloneyo1 9 лет назад

Great Video, I will be doing this to my Daughters car in the Spring. Thanks Again

@bavarianautosport 9 лет назад

Thanks Brian! Just give us a call and we'll help you set up what you'll need.

@battlehrfred 3 года назад

Hi Sir, excellentttttt video and explained in detail,perfect. I have a 2013 x5 bmw 35i 3.0 litre. (north America vehicle).the problem i Have is I dont see the temperature gauge on my dash.but lots of digital everything else.and i was told it into settings (i am not savy on new technology) and would have to be programmed for me to see the temperature on my Dash Panel...I am stumped to realize there is no temperature gauge, which i would like to see at all times, as water/coolant temperature is surely a very important gauge or digital lights to see functional at all times when i drive!! Also is it ok to use a coolant called "OEM Extended Life EURO 1 50-50 Premix Antifreeze/Coolant meets of exceeds performance requirements of ATSM D3306 BS6580 , ASTM D6210-10 ATSM D7583 and recommended for BMW Jaguar Mercedes Benz Mini. Smart Volvo written on the bottle and is mixable with the original BMW Coolant thats in the vehicle from factory? ty in Advance for your input and expertise, 100-100

@willk3807 4 года назад

Just one question...first..all the videos I've watched say after bleeding the coolant system. They say remove the fluid from the filler neck until the fluid level dipstick is slightly less than full. My question...do I need to siphon the excess coolant?

@bavarianautosport 11 лет назад

We do have the MINI version of the coolant flush "on the list". However, the procedures will be the same as shown here. You'll just have different locations for drain, fill, etc. The Bentley Manual would show you these points. We have the manuals in our online store at bavauto.com, part number is MC06.

@jamesbambury 11 лет назад

How do you do this on an E90 328 as it does not have a temperature gauge?

@baharkabul1374 6 лет назад

Hi Bavarian, My engine is E87 BMW 118d, 2008. What happen if I not over filling like you and not use the special funnel and adapter. Just filling to max level and ventilate by start the engine, heating system to max and fan to min and fill more ... ??? Grateful for feedback.

@malp6280 7 лет назад

ook, alil advice if possible I've a 4 cylinder e46 2004, I've just replaced the radiator, thermostat & water pump... I've noticed a small leak near a thermostat bolt, everything else seems OK regarding leaks anyway now I've noticed when I've the Heater turned on the engine temp drops, when the heater is off the engine temp is normal... any ideas?? could it be trapped air in the system still or possible something else???

@yadrianromero2408 11 лет назад

After 15mins of running with the expansion tank cap off on my 99 BMW 528i. The system seems to be pressurized and spills the coolant out. This might be a stupid question but is this normal?

@bavarianautosport 11 лет назад

You should use the distilled water for the intermediate flushes as well as the final fill. This is due to the fact that some of the flushing water will remain in the system. Therefore, it should be the same distilled water that is used for the final fill.

@Bemaritohtori 2 года назад

Thank you for this. I have wrong red coolant inside the system and I'll do a flush with motul radiator clean+ distilled water. Your trick with having correct 50/50 mix was essential! My M43TU system is 6L so I will add 3L concentrate first and top up with distilled water

@desertduck44 8 лет назад

Great video. thank you

@tropikiimba 6 лет назад

I couldn't find the block drain bolt. I have a 2008 BMW x 3 si N 52 engine. Can you tell me where it would be? Thanks

@broUniqe 11 лет назад

Very informative,thanks

@stevsonsonsh.5995 2 года назад

Hello, I have the M57D30 engine on my x5 e70 . Do I need to start the engine in order to activate the pump? I have seen videos only activating it with just ignition on and holding the accelerator pedal for 12 secs for bleed the system. Another question is, isn’t the bmw antifreeze already mixed? What I have discovered if the coolant is to -35 degrees it is mostly a ready mixed coolant and if -70 degrees then it is the antifreeze concentrate what have to be mixed in order to make it to -35 , I think that makes sense doesn’t it? Thank you in advance.

@wvadam 4 года назад

It appears the expansion tank was not drained? or is that washer fluid also blue

@deijonprescott2722 11 лет назад

I've replaced everything to do with cooling the engine and yet sometimes the temperature needle still dances bacc & forth I didn't properly refill the coolant will this solve my overheating problem?

@googleuser8891 5 лет назад

The Radiator on my 97 z3 bmw 1.9L the plastic connector to the upper radiator hose has been leaking i thought tighting it would help but no it didnt. I instead took the hose off to find out the plastic connector piece that mounts to upper house is dry rotted. How do i get the pieces out of the motor? I know its dry rotted when i touched it and it fell off in pieces. I dont think the piece is gonna come out the drain plug.

@ledi1824 10 лет назад

Hello. For a mini r53. How many gallons antifreeze will i need? And how many gallons for distilled water? Also do i need to take out the front bumpers of the mini just to drain the old coolant? Thanks in advance.

@olivafultz6098 8 лет назад

thanks otto i can always count on you

@Superdessucke 3 года назад

I would add that you need to be really, really careful when you fill the system, especially the water. BMWs are very sensitive to air in the system and if you just pour the water in there, versus slowly pouring it so there's no air, you will get air pockets which will impede your coolant flow and probably cause your car to overheat! The video doesn't mention this but trust me, it is very important that you do that part right. Nothing good comes from overheating a BMW engine. Also, on many models, such as the S52 in the E36 M3, the block drain plug is right behind the O2 sensor. So not only is the bolt likely going to be very hard to remove, but your O2 sensor is going to get saturated with coolant when you drain the block and you will set off your Check Engine light and possibly ruin the sensor. So I recommend taking it off first and plugging the hole so coolant doesn't get into your catalytic converter. If you can't do that, the only wrench you're going to be able to get on it with the O2 sensor in place is a 19mm box end. Just be patient. Once you crack it loose, you'll be good to go. When you're done, throughly dry the sensor with a towel before you start your car to avoid a CEL light, and hopefully you also remembered to buy a new crush washer for the block plug ;-) When you do the flush, make sure your car is fully cool. The liquid gets really hot so if you don't wait a few hours, you can burn your hand and arm, if you don't burn it on the hot exhaust first.

@popitn2nd 5 лет назад

I use the same coolant for my 01 bmw x5 3.0i but the tank is already full filling up just he concentrated coolant. I didn’t have to add any water. Did i do something wrong? I thought the 3.0i 6 cylinder takes about 10quarts? But how come it was filled already at 5quarts?

@Neptune8 11 лет назад

Wish you guys would do a video on the process for 2002-2006 mini coopers

@marioserrano5796 5 лет назад

HI, I own a 1999 323i and I replaced the Waterpump and Thermostat Housing (I did not use Chinese parts) as I noticed the car was leaking. Since the car had green coolant I decided to do a coolant flush. I followed the steps in this video to get the coolant out of the block and radiator. I filled with distilled water to do a flush and I was trying to practice doing the bleed; however, the temperature lever does not move at all now. Can you give me some leads as to what might had gone wrong?

@jonathond1982 11 лет назад

I just bought your coolant system rebuild kit for my 2000 323i, and during installation I noticed that there isn't a drain plug on the bottom of the new radiator. Only on the expansion tank.

@BloodScatter 10 лет назад

Hey, my question might seem a bit stupid, but should I bleed the cooling system if I have opened the radiator cap just to check the coolant level and then closed it again? I am not experiencing any kind of overheating or AC abnormalities until now. (BMW e46 318i).

@jamesogara2219 6 лет назад

Terrific -- perfect for my 335d which has a mechanical pump.

@bavarianautosport 11 лет назад

We do not currently have any radiator replacement videos. The Bentley repair manuals will cover the radiator replacements for the various BMW or MINI models. We do have the manuals in-stock at bavauto.com.

@RevoltingSnakeman99 7 лет назад

Had no idea there existed a Form-a-Funnel. I will purchase one immediately. Thank you.

@jodyjody6297 6 лет назад

I have changed the thermostat which was stuck in the open position. I have bought the recommend BMW type coolant blue in color. And it's draining into vehicle. This is my second time putting coolant in. I see that you suggested 5 quarts straight BMW coolant..then put 5 quarts of distilled water. So maybe that's why I'm having this problem...I will adjust and get back to you. Now the first four I put in vehicle were of a 50/50 mixture. Half water into a clean coolant container with the rest being half of BMW coolant.

@johnmoran5830 9 лет назад

i have a 2002 bmw 325i and when i got home a heard a hissing noise from the engine-i popped the hood and saw steam come from the engine and a little coolant from the area of the thermostat- i have started the engine but don't see any coolant-what can it be?

@simplelangperorock 4 года назад

Hi Why didn’t don’t pre-mix’ the distilled water and 100% coolant to make 50/50 after the final flushing with distilled water? Any reason?

@shefketmustafa9228 3 года назад

Hi If you replace with new all the cooling system components on E39 528i 1998 M52 engine and you don't see coolant mixing with the oil.... And you have rock solid hoses, what's would be your suspect for this. BMW dealer here in UK is telling me this is normal but they are exceptionally hard can't squeeze them? When I drive temperature is solid 94C but idling goes to 102 and looks coolant doesn't circulate proper thru the radiator to activate the viscous clutch /fan.

@bavarianautosport 10 лет назад

See our DIY on replacing the water pump on the N51/N52/N54/N55 6-cylinder engines (done on an E90). After the water pump replacement we show how to fill and bleed the system. See it at our Tech Blog at blog.bavauto.com ... search for N52 water pump DIY in the blog search box.

@JayFromIndia 2 года назад

On N52K (2010 528i) where is the Block Drain? Is this to drain only the coolant part that goes around the Engine Block? Please help with Pic

@JohnFaire 6 лет назад

Thanks Auto! Great video. But, since the spill proof kit uses a funnel that is open to outside air, wouldn't the cooling system bleed air to the outside through funnel opening? Is it even necessary to use the bleeder screw?

@Yowzer444 10 лет назад

My car is an e46 325i. My upper rad hose is not too hot to touch but very warm + hard. I noticed this after filling my expansion tank full. As it was just hitting the lip of the opening where the cap goes, it continued to very slowly rise and overflow, which lead me to put the cap on. I didn't notice any air bubbles as it rose. Also, my temperature gauge was dead center at normal operating temperature as this all happened. The gauge continues to stay normal WHILE the hose is very warm and hard. This is a NEW hose i just replaced but i'm still worried. What could be the problem with this, considering all these factors?

@KhaiNguyen-hg6cp 6 лет назад

I need this video with how to replace BMW X3 2005 radiator Thank you

@bavarianautosport 10 лет назад

Yes, mix the Prestone at 50%. The distilled water will allow the coolant to be more effective in preventing electrolytic corrosion, due to the removal of the minerals from the water.

@jamalnasah1625 8 лет назад

thank you

@kevinkroeger692 9 лет назад

Does BavAuto recommend a specific vendor for underbody/under engine splash shields. I have a 1998 328i that came with a missing section, directly under the engine. Just recently, the narrow shield that protects the serpentine and lower radiator fell off somewhere...so I'd like to replace these. Especially with winter around the corner. Thanks!

@jasonl5589 8 лет назад

+Kevin Kroeger OEM for life

@davidyearley84 10 лет назад

Hi Otto, have followed a few of your DIY's and they are spot on. I am currently experiencing a problem which is related to this DIY and I hope you can offer some advice. After a drive and my car cools down, I check my coolant level and I see it has dropped to below minimum. If I loosen the bleed screw some air escapes through it and my coolant level indicator rises back to max. If I go for another drive and check my coolant after my car has cooled down the same thing happens. No coolant loss and no leak obvious. I have tried to bleed but maybe I am not bleeding properly and waiting for the air bubbles to escape fully. Any thoughts would be helpful :-)

@bavarianautosport 10 лет назад

What model is this? You are not having to add any coolant?