Hello everyone! Title says it all, squealing noise coming from the engine when I use engine brake. Started around 3 months ago, getting worse. Peterbilt dealrship mechanics could not find anything. Link to youtube video is here -
Paccar MX 13, makes weird noises.
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Just.Do.It, Nov 3, 2019.
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I could not hear the specific noise from your video. You likely have an exhaust leak. Have the intake and exhaust system pressure tested or smoke tested to identify the leak.
magoo68, pushbroom and Just.Do.It Thank this. -
Check the back pressure valve. Seem to be a common problem on EPA13
Just.Do.It Thanks this. -
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bump your rpms up with the cruise. as soon as your fan kicks on it will move that back pressure valve and it will either stop making the noise or make it worse if its the BPV
Just.Do.It Thanks this. -
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Check for soot around the slip joints on the exhaust manifold as they leak, also egr valve and all the gaskets.
spsauerland and Just.Do.It Thank this.
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