How To Run a Compression Test on an Engine Out of the Car - Honda & Acura

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Are you considering buying an engine that's already been pulled from a car? In this video I show you have to run a compression test on that engine. This method will specifically work for most late model Honda Civics/Accords/CRX and Acura Integras from 88-00.
I also test the thermostat from this same engine to see if it is opening as it should to further inspect it for a future install.
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Jon Widmer
PO Box 13594
El Paso, TX 79913
/ garagebuilthondas
Thanks for watching!
Disclaimer
"Due to factors beyond the control of Garage Built Hondas, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. Garage Built Hondas assumes no liability for any property or personal damage that may arise from doing a repair on your vehicle after watching any of my repair videos. Due to factors beyond the control of Garage Built Hondas, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Again, any injury, damage or loss that may result from improper use of tools, equipment, or the information contained in this video is the sole responsibility of the user and not Garage Built Hondas."

Опубликовано:

10 сен 2024

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Комментарии : 117

@bseries8826 6 лет назад

One of my favorite RU-vid channels because you share a lot of voluble information

@arthellstrobles1241 5 лет назад

Holy shit, your going to save alot of people money with this trick!!!

@GarageBuiltHondas 5 лет назад

I hope so!! 👍😀

@oscarvegacollector3894 2 года назад

This Is what I was looking for , I just found a gsr engine and the junkyard. Now I'm going to check the compression with this little trick

@GarageBuiltHondas 2 года назад

👍

@twitchingwithrage4683 6 лет назад

Great damn video!! Very informative and well put together!

@rpgfreak92787 6 лет назад

Allright! Sunday funday getting started off with some knowledge, nice 👍

@GarageBuiltHondas 6 лет назад

Thanks dudes!

@JoshuaRusso 2 года назад

Great general info! I'm working on an early 90's Toyota Land Cruiser and was just gifted a "running when pulled" engine. This is perfect to help me figure out if the claimed low mileage and good running status mean I can just do a refresh or if I should do the full rebuild. Thanks man!

@GarageBuiltHondas 2 года назад

Glad to help! This was actually pretty fun too!

@upfactoryracing4148 6 лет назад

Nice bit of info. Great job, I appreciate the thoroughness of your videos!

@GarageBuiltHondas 6 лет назад

Anytime Nick, thanks for Always showing love!

@xThe_Caveman 6 лет назад

Amazing work jon keep it up dude great content as always

@blueprintgville 6 лет назад

Thank you for doing this video

@DIYApprentice 6 лет назад

I did a similar compression test on a junkyard Corolla engine - saved me a lot of time, since the engine turned out to be bad.

@GarageBuiltHondas 6 лет назад

Perfect!

@ivuriog 4 года назад

Great video! Exactly what I needed to see!

@GarageBuiltHondas 4 года назад

👍

@dummyjum 6 лет назад

Man. Like always the best content bro. Thanks brotha!

@Punny1234 6 лет назад

Solid how-to video, thanks Jon.

@GarageBuiltHondas 6 лет назад

Thanks for watching!

@metalgearana6451 Год назад

great video thank you

@GarageBuiltHondas Год назад

Hope it helped!

@themechanic6117 6 лет назад

Thanks for the demo

@GarageBuiltHondas 6 лет назад

Thanks for watching brotha!

@goldfishninja8086 5 лет назад

Thank you. Super helpful

@Hedgehodge- 2 года назад

Noice, thanks! I won't shocked? Lots of amps there

@GarageBuiltHondas 2 года назад

Not unless you want to touch the wires together and hold them.

@Hedgehodge- 2 года назад

@@GarageBuiltHondas lol but seriously. Also should I do ground or positive first ahhhh, so many mixed readings online. Other than that, this is amazing for buying a junkyard motor, thank you a ton!!!!

@GarageBuiltHondas 2 года назад

Start with positive first, then do negative.

@gerardogoveche8064 6 лет назад

Jon great video good info always

@GarageBuiltHondas 6 лет назад

Thanks buddy

@Tycrx89 6 лет назад

This is awesome, I have my old CRX Si motor laying around and I wanted to check the condition of it. I bought a hatch recently and I was thinking of using the old a6. Awesome content as always, and when you have time check out the new hatch and tell me what you think!

@GarageBuiltHondas 6 лет назад

Will do homie!

@johnacura99 6 лет назад

Good Job John i don't know i you are aware but there is a tool to crank the starter (remote starter switch) without having the possibility of burning your fingers.

@GarageBuiltHondas 6 лет назад

I did not know, thabks! luckily I haven't had any problems.

@bradysolaem2467 2 года назад

arent you supposed to hold the throttle plate at WOT for the durtation of the cyl comp test?

@soundboydesign1373 3 года назад

Interesting dawg...good vid

@GarageBuiltHondas 3 года назад

👍

@bradysolaem2467 3 года назад

Heater core clogged radiator fan not kicking on even having the timing off will make her hott

@trealwilliams1563 3 года назад

Gr8 video brother!

@GarageBuiltHondas 3 года назад

Thank you

@RUNFROMPOLICIA 6 лет назад

civic GL (1987) overheating issue, firstly my problems was the engine drinking water on a 100mile journey, I put this down to headgasket, I have changed the cam belt,water pump,thermostat ,headgasket,heater matrix, the car now overheats going over 50mph, there's a lot of bubbles coming to the filler neck, the radiator looks really rusty, thats the only thing I haven't changed, also I have hot n cold heaters, which means headgasket, does this mean engine is no good?.

@GarageBuiltHondas 6 лет назад

It's possible. People will experience overheating issues when there is still air in the system. You could try doing a coolant flush to help remove some of the rust and corrosion inside the engine. Maybe you have a partially blocked passage which is creating the overheating issue.

@lsvtech21 6 лет назад

Nice video bro, bit if I'm not wrong, don't you suppose to open the throttle wide open while the engine is cranking?

@GarageBuiltHondas 6 лет назад

Thsts a great question, one I'm not sure of the exact answer. You know, I always do that when it's in the car, but out I don't. You could hold the throttle body open but it hasn't made a difference for me when checking. I read about people getting low readings not holding the throttle open when in the car and getting a completely different reading holding it open. I say try it both ways if you're getting readings that are out of wack.

@BG.22 6 лет назад

I have a question, I’ve tried to do a compression test in my CRX (D16A8 or ZC) and even if my battery was at 13.6v without the engine on, the starter started to make the noise as if the battery was dead after 2/3 seconds of compression test... do you think it’s a faulty starter motor ? Thank you and keep up with your excellent videos !

@GarageBuiltHondas 6 лет назад

It sounds like it might be at fault. My battery lasted a while and it hasn't been in a car since January. I had to use jumpers to get more power though but it still powered through. And thanks for watching, I love the support!

@BulliKid 4 года назад

What if there is no starter? Can we just crank the pully bolt over with a gun?

@GarageBuiltHondas 4 года назад

You can try. But the way the engine spins you'll probably just remove the bolt.

@jamzempire 6 лет назад

Great vid 👌🏾

@GarageBuiltHondas 6 лет назад

jevvy boss thanks!

@S7RING3R 5 месяцев назад

Need oil in the engine to do a compression test?

@GarageBuiltHondas 5 месяцев назад

Yes, it's recommended.

@hondaland_ 6 лет назад

Cool vid 👍

@GarageBuiltHondas 6 лет назад

🙏👍

@SR_KSERIES 6 лет назад

Maybe used water not anti-freeze and clog up rad? Or inside engine clog up.

@GarageBuiltHondas 6 лет назад

sr kseries I was thinking the same. The engine is so dirty that it was neglected a little and could probably benefit from a coolant flush.

@nic1586 3 года назад

im planing on doing this but your suposed to do compression tests when the engine is warmed up how can you know how many psi higher it will test when warm

@GarageBuiltHondas 3 года назад

Cold are fine too. It'll give you a general idea of each cylinder and the variance between cylinders helping to determine if the engine is still in good shape.

@Im_arturo 6 лет назад

What are you gonna do with all your extra motors? My 90 ex needs a new one

@GarageBuiltHondas 6 лет назад

Arturo Gomez The ZC is accounted for, it's going into my wagon eventually. The B2 I'll probably sell. Are you local?

@Im_arturo 6 лет назад

Yeah i am. I actually just need the block and head for my car

@GarageBuiltHondas 6 лет назад

So just the longblock, are you on IG, send me a msg. Or email me your # if you don't and I'll text you. garagebuilthondas@yahoo.com

@ReaperAndTheRebel 2 года назад

Do the intake and exhaust manifolds need to be bolted on still? I removed mine already.

@GarageBuiltHondas 2 года назад

No.

@raeleenmandy6359 4 года назад

Is it possible just to use a starter gun , just connect the clip to the start gun and the power to the other side of the starter gun and just crank it ???

@GarageBuiltHondas 4 года назад

I don't see why not. 👍

@Mike_44 Год назад

I need to do this test on my jdm Subaru motor I received recently, it’s still outside the car. My motor is empty, has no oil now. Noob question: Should I fill up the motor with oil to the max mark or this test can be done with the motor half way full? Great video btw!

@GarageBuiltHondas Год назад

I'd honestly have the required amount. Too little and the oil pump may not be able to distribute it

@Mike_44 Год назад

@@GarageBuiltHondas Makes sense, thank you.

@Mike_44 Год назад

@@GarageBuiltHondas One last question, my motor doesn’t have a flywheel, only a flex plate since it’s an automatic. How will the starter motor turn the motor without teeth to hook on? And I removed everything on the motor, only have the bare block & heads with exhaust manifold snd some vacuum hoses attached. I even removed the turbo. Can I perform a compression and leak down test on an engine this way?

@GarageBuiltHondas Год назад

You'll need the auto torque converter bolted to the flex plate. That's what has the teeth on it.

@Mike_44 Год назад

@@GarageBuiltHondas Yes, I figured it out already. Thank you

@ianwilliams4787 Год назад

how do you secure the engine on that trolley?

@GarageBuiltHondas Год назад

I didn't, it's just sitting on the ground.

@sraff1072 6 лет назад

What is normal compression for one of these motors?

@ricardocasalkam 6 лет назад

anything up from 140psi consistently through the cylinders.

@GarageBuiltHondas 6 лет назад

Agree, usually between 140-185 is normal and it really depends on the compression tester gauge and some may have different readings. What's important is that they are all within 10% variance of one another and these were pretty readings across all 4.

@jacknelson9440 6 лет назад

Garage Built Hondas my b18b had 150 on 1-3 and number 4 was 120

@GarageBuiltHondas 6 лет назад

How did it run like that? Decent still but losing oil?

@jacknelson9440 6 лет назад

Garage Built Hondas runs decent I daily drive it, burn a quart of oil every 300 miles but the valve seals are also bad

@powdere4donuts 5 лет назад

How do i do a compression test if the transmission isn’t on the motor?

@GarageBuiltHondas 5 лет назад

Watch this video

@brunoburtoni8479 5 лет назад

So how does the test equate to overall compression of car?

@GarageBuiltHondas 5 лет назад

It shows you the compression of the engine.

@domualex 4 года назад

do you need to have oil in it while doing this?

@GarageBuiltHondas 4 года назад

Yes

@captintemplar3705 3 года назад

Would it be possible to do this without the transmission?

@GarageBuiltHondas 3 года назад

Watch the rest of the video.

@captintemplar3705 3 года назад

@@GarageBuiltHondas thank you so much, loved the video and learned a lot for when I'm buying a motor later today!

@bradysolaem2467 3 года назад

Call it a wet compression test w a few teaspoons of oil dry without :) why you always disable fuel for it will wipe cylinders clean and take mucho compression with it giving false results at best skewed numbers normal conditions would be wet

@GarageBuiltHondas 3 года назад

👍

@makimano1990 Год назад

Can I turn the engine by hand?

@GarageBuiltHondas Год назад

Not for a compression test.

@makimano1990 Год назад

@@GarageBuiltHondas thanks for the answer! Can I ask why? In my mind if I turn the engine 4-5 times like the starter does, It still makes compression Sorry I'm a newbie

@GarageBuiltHondas Год назад

Try it. I've never tried it before.

@TurboD16z6 4 года назад

So. What if theres no transmission?

@GarageBuiltHondas 4 года назад

You didn't watch the entire video.

@TurboD16z6 4 года назад

@@GarageBuiltHondas didn't need to, I have a k series. So starter on the block. I was trying to figure how to do a compression test if there's no starter or flywheel if there's was another way . Guess I'll just slap the flywheel and starter back on.

@TurboD16z6 4 года назад

@@GarageBuiltHondas also you forgot to mention that removing all the plugs makes the job for the battery easier. Also I'm not going to touch the starter with the wire to start it. Literally I thought you were about to get electrocute.