Jake Brake noise

[Larv]

I have noticed a squeal in my jake brake when it initially starts to slow me. Works ok, just a momentary squeal. Dlr suspects the butterfly valve needs to be replaced so that's where we'll go next Monday.



Anyone else experience this?



Larv

 

[Dean Upson]

Mine had a squeal before I had the alternator bracket replaced with the new style on the tsb, it went away for a while then came back, stayed awhile and then left for good. I haven't heard it for months. I think the noise is belt related but am not real sure of that.



Dean

 

[Larv]

It certainly sounded like a belt squeal and the jake brake is belt driven, even uses a special belt so we'll see. I really don't care what the tro is , just want it fixed.

Larv

 

[MDKram]

I believe the engine cooling fan is engaged with the Jacobs exhaust brake. If that is the case, the belt chirp is most likely due to the fan clutch engaging.

 

[DE Jeeper]

Mine has started to chirp too. I guess I have had it on for over a year now. I am pretty sure it is a belt squeal.



I was told to put a few drops of oil in the vaccum line to oil the butterfly, but that was to prevent it from sticking.