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Noise when exhaust brake is applied

Yahoo Message Number: 9165
I have a '95 Intrigue with a 300 hp C8.3. I have a noise when the exhaust brake is applied and only when it is applied. It seems to change pitch with RPM. It sounds like a squeeling fan belt, but it isn't. I am thinking that maybe it is one of two exhaust clamps leaking. The one on the outlet of the exhaust side of the turbo, or the one that connects the exhaust pipe to the pacbrake. Anyone else had this?
Mike

Re: Noise when exhaust brake is applied

Reply #1 –
Yahoo Message Number: 9172
I found it. The number 6 hole exhaust manifold gasket is leaking and that stainless steel gasket was acting like a whistle.
Hopefully I can just replace that one gasket. I am not so sure that the exhaust manifold isn't warped....that would be very bad.
Anyway....that is the skinny.
Mike

Quote from: faa_engineer
> I have a '95 Intrigue with a 300 hp C8.3. I have a noise when the > exhaust brake is applied and only when it is applied. It seems to > change pitch with RPM. It sounds like a squeeling fan belt, but

it

Quote
isn't. I am thinking that maybe it is one of two exhaust clamps > leaking. The one on the outlet of the exhaust side of the turbo,

or

Quote
the one that connects the exhaust pipe to the pacbrake. Anyone

else

Re: Noise when exhaust brake is applied

Reply #2 –
Yahoo Message Number: 9181
Mike,

I have a 96 Intrique and notice that when I have my exhaust brake on, there seems to be a loud high pitch whinning noise associated with it! When I accelarate, it goes away. Release the pedal, it returns! I haven't had any problems with the Pac Brake and hope this is normal. Haven't had anybody tell me different?

Mickey
 

Re: Noise when exhaust brake is applied

Reply #3 –
Yahoo Message Number: 9188
Mike,

We lost the pipe that goes from our turbo to the muffler last week. Burned a hole in an air line and melted some transmission wires. CCI told me that they have had 5 coaches do this.

bill G. 2001 Magna #5998