I have a 2007.5 6.7L Mega Cab 4X4. On the way home from a trip the other day, the turbo starting making a weird noise when the exhaust brake engages. It sounds sort of like metal on metal, almost like the turbo is being starved of oil. It's a loud shrieking sort of noise. At first it only did it when decelerating with the exhaust brake on, now it does it when accelerating quickly. But it doesn't do it all the time, only intermittenly. By the way, I checked the oil level and it's good, and the oil was changed about 2K miles ago. Does this sound familiar to anyone?

Thanks,

Dave

 

I've never heard anything like that from mine. I can barely hear the whistle when it's working. I've heard of some guys having the turbos replaced. Maybe there is something wrong.

 

Nobody else has heard of this?

 

best bet is to bring it in just incase. don't want that turbo comming apart and causing damage to you're engine.

 

Good advice.

A 6.7 should be under factory warranty. Use it. That's what its for.

If it is a turbo failing, stop using it, cold very well damage more than just the turbo.

 

I've heard of that.Friend of mine his did it after turbo replacment for a cel.Hot it sounded nasty after a all night cool down was "almost normal". Loose not seated manifold were turbo is bolted on.

 

I have the same problem,, can you let me know what the dealer says.. ill take mine in too. I thought I was the only one hearing things.

 

same here,

i haul a 2 car trl and when i engage the exhaust brake it does that. talked to mechanic and said it's normal. not very sure tough. keep us posted on it . ty

 

Pull boot to the turbo and take a look at wall around fins , I think you will see rubbing . Any marks at all turbo is junk . Do not run it like this have it towed in , you are putting metal through your engine . Check your oil , if level if high , you lost and injector which took out your turbo , possible cause . It will only take a few minutes to check , remove the two hose clamps , one on the air filter the other at the turbo , unplug sensor and remove . Check for play in turbo shaft , if any , park and have towed . you do not want all the pieces going through your engine .

 

Had a problem with my 05 made about the same sounds. turned out to be a hole in the exhaust manifold. (that was just the begining) take previous advice tow it in and have it checked.

 

so it's something with the turbo!On mine it doesonly it that when i'm under load and towing not when i'm empty.What is the actual cause on it?
ty

 

Good advice,,, just don't panic when you see the turbo covered in oil. The 6.7 has PCV and it sucks oil in from the crankcase and covers the entire intake system from turbo to engine. I modded mine to vent out like the 5.9s do so it won't pollute the whole system. Couldn't believe how black it was.

 

THis is when you are making the most boost. If it is a leak in the exhaust manifold you will have more drive pressure at full boost and that is when you will hear it. If it is a bad turbo it could be pulling the cartridge forward under full load and hitting the housing. Either way. Have it checked out.

 

Thanks for the advice diesel lady. I will have it ASAP.