Pete 579 2017 mx13 Fan won't shut off. Need to just disconnect it. No one here can work on paccar so it will need to go elsewhere . Don't want to drive around with it running and burn it up.
How to disconnect coolant fan
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by markk, Nov 29, 2021.
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Driving around with the fan on will not burn it up . Pulling hard and no fan can over heat the engine if you aren't careful . You might have an air leak on the fan clutch and lock it on full time .
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Only thing it will kill is fuel economy. Won't hurt a thing to drive it like that.
Oxbow, bzinger, beastr123 and 1 other person Thank this. -
I do have some air leaks. Had one bleeding off quickly when shut down . I don't know what it is for but it was a white line going down next to fuel filter on engine. I don't think that airline on fan is leaking, but I'll check. Hard to tell with engine running .
Shop is going to look tomorrow but they don't do paccar so no scanner.
I do have a code that pops up about high temp at exhaust or intake , I forget. But when thermostat went out a while back the guy thought temp sensor on passenger back of engine was bad. No one had one so he put a used one in, could be that maybe.
MPG are doing good since the guys I went to fixed that dpf etc problem . 7.5 coming home earlier from shop fixing my trailer .
Thanks for the replies guys.Rideandrepair Thanks this. -
Something else I forgot .
Ever since I've had this truck , April, the fan slowly turns non stop. I asked two mechanics and both said that was normal. Don't seem normal to me.
Oh, and I do not think the fan can be turned much with engine off. It is real stuff but if I remember correctly I could turn it but it took a lot of effort -
Some do it, some don't. Just a little bit of motion being transfered through the hub bearings.
Rideandrepair, Dino soar, bzinger and 1 other person Thank this. -
If I pull the air line off and blow air into it from my air hose will that stop the fan from turning if air leak is the problem ?
I did not know air pressure stopped it. I thought the air came on and made it run.
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Nope, air to release. Default to on with no air.
black_dog106, Rideandrepair, Oxbow and 3 others Thank this. -
The fact that you can move the fan with effort when it is engaged is also a good sign, you have reasonably good friction surface and a smooth clutch plate.Rideandrepair and markk Thank this.
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