2008 Dodge 6.7 Cummins Engine Brake Whine

[barleyfarmer]

My truck started to whine when I turn on the engine brake!It never used to!I changed the exhaust gas filter on top of the engine (200$) because it had the perform service message come up on the screen!I have 130 000km on the truck.Is there a broken line or do I have to remove the valve assembly and clean it?

 

[Diamondledinc]

My truck started to whine when I turn on the engine brake!It never used to!I changed the exhaust gas filter on top of the engine (200$) because it had the perform service message come up on the screen!I have 130 000km on the truck.Is there a broken line or do I have to remove the valve assembly and clean it?

If its whining like a turbo whine. thats normal. Its creating extra back pressure and spinning the turbo very quickly as the vane position changes, hence slowing the vehicle down.

 

[barleyfarmer]

No not turbo noise.It squeals even at idle when I hit button to turn on brake.Then squeals when slowing down and brake engages.It never used to make noise so I am starting to think I have a leak somewhere.Also I see some guys remove the valve and put in a delete kit.

 

[arff]

Talk to Ric. He did the delete on my truck. Best thing I ever did. Improved my mileage and power on my 6.7.

Sherwood Park Service.

464 6000

 

[Absledder]

Probably an exhaust leak somewhere. Same thing happened on my father in laws 07 when he had it. Not sure where his leak actually was but if it gets worse with the brake it's probably upstream of the turbo.

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[nosaj82]

There is a Cummins form online with loads of info. You might be able to find some good info that will point you in the right direction


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[PJ440x]

My truck started to whine when I turn on the engine brake!It never used to!I changed the exhaust gas filter on top of the engine (200$) because it had the perform service message come up on the screen!I have 130 000km on the truck.Is there a broken line or do I have to remove the valve assembly and clean it?

I know what's wrong. It's the liner in the hose connected to Hydro boost system. Let me know if this link works for you. It happened to me a few months back. An easy fix.

https://m.youtube.com/watch?v=rsV78-X2jWM

 

[LBZ]

Exhaust leak from the exhaust manifold. Probably number 5 or 6 hole. Buddy's '08 did it for months till he finally went looking for it. New gasket fixed it.

 

[ABMax24]

Check the gaskets on the EGR cooler, had 3 work trucks that have each had them replaced twice. It makes the turbo squeal really loud with the exhaust brake active, and it would even do it under hard acceleration with the turbo at full boost.

 

[northof40]

Exhaust leak from the exhaust manifold. Probably number 5 or 6 hole. Buddy's '08 did it for months till he finally went looking for it. New gasket fixed it.

Likely this^^. Either cracked manifold or gasket leaking, Many that were left with emissions systems intact were prone to cracking or gaskets blowing on the earlier models. They see some very high temps during a regen.

 

[growly]

Exhaust leak at the manifold. Common problem