When you have a fan that wont turn on or maybe it wont diseguage,This would be a great place to start. And if any of it comes in handy help out the hungry mechanics fund $BKdieseldr on cash app or venmo
Appreciate that positive feedback. Always needed and I can’t make it without support from viewers like yourself. Stay safe and stay grinding out there.
That will usually happen due to low air pressure. When the air gets to over 100 psi it should turn off the fan. Also whenever the ac compressor pressure gets to high.
@@igorobukhov8138 that’s a tough one. Could be one of many issues. Simple wiring issues , spread pins at connector, bad clutch,bad solenoid,high pressure switch failed. Would just need to start with that t/s and dive in.
That is a tough one since there are quite a few things to look at. But I can help with a quick test. Key off fan will lock on. Key on fam will unlock. If it stays on unplug solenoid. If it stays on remove air line from solenoid to fan and see if it is coming out of solenoid. If air is coming out and it unlocks than solenoid has failed. If it’s locked at that point than clutch has failed.
Man that is such a great question. Appreciate you reaching out..There will be some very minor play due to the clutch being activated but it will be so small like an 1/8 of an inch play.if its sloppy for sure its time to replace it. And dont forget these vids can make great bday gifts.
How is it going Busted Knuckles. I’m having a issue on my 2019 cascadia. Could you please give some advise. I got a coolant level very low warning and engine shuts off after 1 minute. I’m on the side of the road trying to figure out what the issue is. I came across your channel and you have great information. I did some tests based on your video. My fan moves freely ignition, solenoid seems to be working. No leaks, coolant level is not low either. Any advise? I would appreciate it pls
Thanks for reaching out. I have a video in my line up for just this issue. More than likely either your coolant sensor is shorting internally or your wiring by your coolant level sensor is pulled to tight or vent causing an open circuit and throwing that code. You should be able to jump the two pins to get over safely till you get it narrowed down.
2017 cascadia daycab, will a bad ac compressor keep the engine fan from engaging as engine temp raises? Ac is working fine but have a code for hvac. Engine clutch fan turns freely with key on, also runs at idle but does not engage and turn faster as temp raises.
Why yes I am,, So with opt idle if you have comfort mode enabled and run the ac it should continuously run till it cools down till your set temperature. So technically If U left the windows open and ran it on ac cold , it would never get to temp and cont run the Eng. but if you don’t hav comfort mode enabled than your outta luck and need to get that parameter end Enabled.
I have a 14 cascadia with dd15 Recently my fan would engage for about 10 seconds while driving for no reason. I would lose accelerator for about a second. AC was not running and engine was not hot. What could cause that?
Either you have a strange electrical issue like a rub somewhere along your harness or two separate issues such as one with the accelerator and one with the fan
Can a bad fan clutch cause overheating? My fan runs constantly. I've changed the water pump, thermostat, tank reservoir, radiator and heater core buy it's still overheating. Any suggestions?
Great question, when the fan comes on it reduces power and coolant temps. So with the fan on the temps should be maintained lower since your forcing more air through the radiator. Now I can see if you push your truck hard and it just can’t keep up such as plugged radiator/cac than u might be running hotter temps. But turn the ac off when u run and see if it affects the fan operation. Than you will know if it’s ac related or strictly a truck side issue.
Mr. Busted Knuckle I hate to bother you again but my foot brake valve is “whistling “ and every time I press the brakes it stops. Is it a sign of it going bad? Are there other components of the air brake system I should check first?
Not a problem at all man. This can be a problem with one of your brake chambers backfeeding air. If you have squeeze pliers you can clamp off one chamber at a time and do the same routine to see if it still leaks air. If you through all chambers and it still leaks than I’d lean towards a brake valve.
How’s it going? My fan comes on and it’s a small hiccup when it does, and it comes on periodically and my engine don’t be close to 200. I’ve changed out my fan solenoid switch already and I’m not sure what else it could be.
Thanks for reaching out. I think your very close to the problem. When it’s intermittent operation there’s only a couple things it’s going to be. Since you changed out that solenoid. I would check that solenoid connector and wiring for any shorts or any spread pins. Which is very common. After that a high pressure switch for the ac would also cause fan to activate when not requested. Start with the connector and hopefully your issue is there.
@@bustedknucklebydieseldr3228Hey busted knuckles. Im also having an issue with my fan not coming on when it’s about 215-220 it’s just over heats. I did the fan test and it spins freely when the key is on and locks up when the key is in the off position. I’ve changed the thermostat and the fan clutch solenoid but it’s still doesn’t engage when it reaches hot temperatures. But when I disconnect the fan from the solenoid it turns on. It also turns on under 200 when Idling. 2017 Freightliner
@@Justknick thanks for reaching out. If the fan turns on when idling and ac is off we have a problem. If it turns on with ac on than we’re good. The fan will come on about 220 and drop temps to about 200. If that’s the case when driving we’re all good. If the fan comes on and temps don’t drop than we definitely have issues with radiator blockage or cooling system problems. Hills are tough but as long as it doesn’t pass 240 than we’re still safe.
Thanks for reaching out. It sounds like your luck is not getting any better. The code for for your rear 3 injectors shorting to ground. So either an injector problem, oil coming through the harness problem, harness issue or lastely a mcm issue. More times than not I’m running into oil through the inj harness causing erroneous codes or just the inside inj harness is old and brittle than starts loosing contacts. But this will Deff keep you from running. Did you have it washed just before, water may of got into the connections. Hope this info helps some.
@@bustedknucklebydieseldr3228 yes the guy said he sprayed the engine with a pressure washer to remove oil leaking from the injectors. I guess that water got into the system. Any ideas on how much this fix would cost and if the water could possibly dry up and allow me to get moving to a repair shop. Thanks for the advice 🙏
@@jamesball8519 well than that makes sense. Couple of options. Blow out all connections there and wait and see what happens. Or t/s and see where it leads you. No idea on costs as this can lead you in multiple repair directions.
My fan clutch is constantly engaged , could this be the culprit of my box not reaching adequate temperature and emitting white smoke once it’s relatively warmed and i hop on the fwy. It’s starts blowing white smoke for 8 min- throws the MIL and check engine but then stops spewing white smoke until i turn off the truck again. Box replaced 7th injector replaced Doser block replaced All 6 cylinder compressions are good ( 98+)
@@HectorWPadilla this will definitely not be the issue. Thanks for reaching out and watching. White smoke will be coolant or def. If your fan is constantly engaged I’d have your solenoid checked or your ac pressure switches checked out as they are huge culprits.
I have a question my man ? I’m not getting any current to the compressor from the wire that connect the AC compressor I check fuses,relay and the two side of the connector not power at all replace the connector still not power to the AC compressor what do you think will be and that is the only electrical problems that I have on my Cascadia 2013 any advice please?
Thanks for reaching out. If there’s no power to your ac comp connector and there is power at your ac comp fuse than I’d be checking your midway connection at the firewall. A lot of times these are grounded at the starter so that ground might be disconnected.
Hi. I got a 2015 DD15 and my engine fan starts by itself and runs for about five minutes , many times a day, when outside temperature drops below 0°C or 32°F. Nobody seems to know what the problem is.
Thanks for reaching out. If your fan turns on it’s from one of two things. Either ac is on our engine temp is getting past 220. If ur fan is coming on and than turning itself off after a few min than there’s no issue. If its erratic than I’d start looking looking at the wiring. Most common for your year is spread pins at high pressure switch or the fan solenoid.
Evening man ! I’m having a problem where my fan won’t disengage when the a/c is turned on. It only does this after the air conditioning has been operating about a hour or two. Could you please help me out ? If I don’t turn on the a/c the fan operates fine.
Boss good afternoon I have another question about ops system what’s the torque spec on the 17 mm Allen bolt that’s connected to the oil filter housing thank you 🙏 again
Thanks for reaching out, that bolt is around 45 ftlbs..Something like that. Good and tight will do it,Just make sure you replace the washer seal or itll leak..
Great question, yes the fan will have a slow spin to it when the engine is on. Good way to test it is have key on engine off and see if it’s free spinning. If it is than yours solenoid is looking good. Key off and it should lock up. IF it is than nothing else to worry about. Have a drink and relax the rest of the day.
I'm having an issue with my fan, my question is when the engine is off should I be able to spin the fan with my hand? I can take my hand and turn it freely. Would it be safe to say I need a new clutch?? I replaced the solenoid thinking that was the problem but when cranked the fan spins slow but never kicks on.
Great question, and thanks for reaching out. The fan on most typical FTL products are normally closed. So with this set up the fan will spin free with key on. With key off it should lock up after 30 seconds. Now this is assuming you have a air actuated fan and not a viscous style with fluid in it. With engine running if you unplug your fan solenoid it should engauge the fan and you will notice a difference. Easy test there. If that turns it on I would chase either an ac issue or parameter issue.
@@bustedknucklebydieseldr3228 Thanks for the reply, it was the clutch. Just finished replacing it an hour ago. As you said with the key off it's locked and with it on it moves. Also unplugged it while the engine was running and it kicked on. Thanks for the info man.....
Hola Dr Busted knuckles, Tengo una pregunta no tocante a Este video, pero se lo Mando aqui aver si lo ve como es mas reciente, ojala y me pueda ayudar, pusimos los 6 inyectores y El semi no quiere prender, lo que pase es que manda El diesel para tras al filter del water separator y Manda presion para El tanque de diesel. Un mekanico dijo que puede ser la pompa del diesel, y otro mekanico nos dijo que cambiaramos primero la pressure limiting valve, usted es El Unico que e encontrado que tiene video sobre esa valvula, usted cree sera esa El problema? Gracias por SUS videos espero su contestacion
Hola si puede ser una posiblidad que sea esa balbula pero sin tener una conputadora y poder monitoriar las presiones de diesel esta dificil darle una respuesta
@@bustedknucklebydieseldr3228 buen dia, gracias por su imediata contestacion, ESO es muy bueno de su parte. Si estamos en ESO esta tarde vendra alguien con computadora aver como nos va. Diosito lo siga bendiciendo tiene un ❤️ bueno, saludos desde Florida👋👋👋👋
If your fan is not able to come on than the ac compressor wont be able to be turned off. And just the opposite. If fan stays on the ac comp can’t build press. So yes it will be affected.
There might be a couple of issues here. You may have the incorrect fan clutch installed. Mounts the same but wrong type. Or something going on with air supply to fan clutch. Either solenoid issue or air line issue
2010 centry with a dd15. You must have a special glider kit on that truck. That fan is controlled by a solenoid usually on the firewall. I would start there and see if unplugging it enguages the fan.
Great question and thanks for reaching out. So far ur issue sounds like it’s working fine. When u plugged your is supposed to turn on. When plugged in your fam will disengage intill either ac pressure turns it on or engine temp turns it on. Before that it should turn slow.
@@bustedknucklebydieseldr3228 ok go it. but i see lately the fan its spinning slow and my temperature its going up a little bit higher that usual around 200 maybe more . used to work all the time around 185 like the fan its not turning when supposed to . it’s turning on spinning fast but at higher temperature . any suggestions? thanks for replying and help
