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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Yes, that is exactly the noise a cracked or leaking manifold will make unless it has a major hole. Then the noise will be more throaty - I doubt that's the case because you'd see high EGT's and low boost with smoke. It wont back-fire.
You cannot crack the manifold with your driving style. It will down shift on its own if it really needs to. And stock tuning wont allow for that anyway because of the later timing (EGT may seem high but doesn't stay in the cyl long enough to be a problem).
With a lot of very heavy towing in the hills the manifold may eventually shrink - this is less of a problem on the 6.7 than the 5.9. You can see this by the mounting bolts being bent inward toward the center of the manifold. If this gets bad enough it will break either the ears of the manifold or the bolts.
EDIT, wanted to add that you may see tell-tale black soot marks where any leak is too.
You cannot crack the manifold with your driving style. It will down shift on its own if it really needs to. And stock tuning wont allow for that anyway because of the later timing (EGT may seem high but doesn't stay in the cyl long enough to be a problem).
With a lot of very heavy towing in the hills the manifold may eventually shrink - this is less of a problem on the 6.7 than the 5.9. You can see this by the mounting bolts being bent inward toward the center of the manifold. If this gets bad enough it will break either the ears of the manifold or the bolts.
EDIT, wanted to add that you may see tell-tale black soot marks where any leak is too.
