2007 Dodge 6.7L exhaust brake squeal?
My Dodge 6.7L has started a rather loud high pitched squeal when using the exhaust brake. Sounds similar to brakes squealing. Have 80K miles on it. Have read online others with same issue but no co...
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maybe time to service the exhaust valve. the "butterfly valve" sounds like it might be closing completely, the valves are designed not to close completely to prevent them from sticking. the valve does have orifices in the plate, to allow exhaust gases to pass when exhaust brake is actuated. could be that the valve is dirty and the whistling your hearing is the exhaust gases passing through a much smaller orifice. or the actuator piston needs calibration...over extending causing the butterfly valve to close completely.
