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Topic: County Coach turbo replacement (split from Re: Is my turbo dying? (Read 1021 times) previous topic - next topic - Topic derived from Is my turbo dying?

County Coach turbo replacement (split from Re: Is my turbo dying?

Mine had a loss of power and a puff of smoke here and there. Found peice of turbo gasket missing.

Re: County Coach turbo replacement (split from Re: Is my turbo dying?

Reply #1 –
After pulling turbo found this.

Re: County Coach turbo replacement (split from Re: Is my turbo dying?

Reply #2 –
From the looks of your impeller, you have had something upstream come apart to cause that damage. The impellers don't wear out looking like that.

Re: County Coach turbo replacement (split from Re: Is my turbo dying?

Reply #3 –
Quote from: craneman –
From the looks of your impeller, you have had something upstream come apart to cause that damage. The impellers don't wear out looking like that.
Wow! I have had a turbo go bad, smoked grey-blue. Found the seals were shot, decided to replace the whole unit, STILL SMOKED! Took the whole top end apart and had everything checked, all fine. Turned out to be the brand new turbo that had sat on the dealer's shelf too long and had shot seals, too! At least, I knew the top end was in good shape!  :facepalm:

Re: County Coach turbo replacement (split from Re: Is my turbo dying?

Reply #4 –
Wow Mike, that is shockingly catastrophic, but perhaps repairable.  What is the history of your coach and what engine/coach do you have?  Not in your sig or profile. 

If turbo gasket(s) fail, it can cause some level of performance degradation, but shouldn't cause that kind of impeller damage.  That damage looks like something metallic was introduced into the intake.  Woody.

Quote from: Mike Brez –
After pulling turbo found this.


Re: County Coach turbo replacement (split from Re: Is my turbo dying?

Reply #5 –
Quote from: craneman –
From the looks of your impeller, you have had something upstream come apart to cause that damage. The impellers don't wear out looking like that.
Agree, bought a coach that had  a impeller looking like that, no smoke but only 20 psi of boost. Replaced with rebuilt turbo and boost went to 32 psi.

Re: County Coach turbo replacement (split from Re: Is my turbo dying?

Reply #6 –
Only took three turbos

Re: County Coach turbo replacement (split from Re: Is my turbo dying?

Reply #7 –
Vacuumed out air charge cooler replaced all boots and pressure tested

Re: County Coach turbo replacement (split from Re: Is my turbo dying?

Reply #8 –
Quote from: Pyolet –
Wow Mike, that is shockingly catastrophic, but perhaps repairable.  What is the history of your coach and what engine/coach do you have?  Not in your sig or profile. 

If turbo gasket(s) fail, it can cause some level of performance degradation, but shouldn't cause that kind of impeller damage.  That damage looks like something metallic was introduced into the intake.  Woody.


It's a Detroit series 40 in a country coach the turbo gasket is metal

Re: County Coach turbo replacement (split from Re: Is my turbo dying?

Reply #9 –
Split this non-Foretravel tech discussion out of another topic.

Re: County Coach turbo replacement (split from Re: Is my turbo dying?

Reply #10 –
That piece of gasket may have been what ate the turbo

Re: County Coach turbo replacement (split from Re: Is my turbo dying?

Reply #11 –
Being on the intake side that would be my thought also.

Re: County Coach turbo replacement (split from Re: Is my turbo dying?

Reply #12 –
If the damage is to the compressor side, where would that gasket go? That gasket looks like it goes on the turbine side from manifold to turbo.

Re: County Coach turbo replacement (split from Re: Is my turbo dying?

Reply #13 –
Quote from: jcus –
If the damage is to the compressor side, where would that gasket go? That gasket looks like it goes on the turbine side from manifold to turbo.
You are right
There would be no contact from that gasket to the intake side of the turbo. The missing piece would have gone through the exhaust impeller out the exhaust pipe.

Re: County Coach turbo replacement (split from Re: Is my turbo dying?

Reply #14 –
Quote from: craneman –
You are right
There would be no contact from that gasket to the intake side of the turbo. The missing piece would have gone through the exhaust impeller out the exhaust pipe.
When I had the same type of damage to my compressor wheel, checked out the air intake system and found PO, or repair shop, had installed air filter wrong  and there was about a 1/2 gap in the filter housing that admitted unfiltered air. From receipts I found in the coach, seems it only took about 6 months to do the damage, so make sure your air filter is installed properly. Mine was on a series 60, bigger brother to OP's series 40.

Re: County Coach turbo replacement (split from Re: Is my turbo dying?

Reply #15 –
Check all air intake duct. Especially any aluminum tubing. I  had a aluminum air duct on my Peterbilt that crosses over the valve cover. It had dropped down and made contact wearing a thin spot in the bottom of it. A small piece flaked off and did about the same thing as yours. Look all that over very carefully. And look in air filter housing and make sure nothing is in there. Vacuum canister out and replace air filter.

Re: County Coach turbo replacement (split from Re: Is my turbo dying?

Reply #16 –
Quote from: craneman –
You are right
There would be no contact from that gasket to the intake side of the turbo. The missing piece would have gone through the exhaust impeller out the exhaust pipe.


That gasket goes between the engine and turbo. That chewed up wheel is the compressor side. In order for those gasket peices to go out the exhaust it first would need to go through the air charge cooler pushed up by the Pistons then the hot side exhaust wheel and out the exhaust. This is why I vacuumed out all the tubing and removed the boots and air tested the air charge cooler.


Re: County Coach turbo replacement (split from Re: Is my turbo dying?

Reply #17 –
Mike That gasket is on the Exhaust side of the turbo. the old piece would have passed through the exhaust turbine and entered the exhaust pipe if in fact it did. Sometimes they split and just work their way out and fall to the . Your Damage is on the Intake side turbine.,That mounting gasket would in No Way have caused the damage on the intake impeller. Something sucked into it from the air filters back. I/E filters not filtering good,Trash in intake piping,etc inspect very carefully and make sure the correct air filter is even installed. That can happen also someone can replace an air filter with the wrong one ,possible to short or faulty gasket and cause these type issues.

Re: County Coach turbo replacement (split from Re: Is my turbo dying?

Reply #18 –
Quote from: stump –
Mike That gasket is on the Exhaust side of the turbo. the old piece would have passed through the exhaust turbine and entered the exhaust pipe if in fact it did. Sometimes they split and just work their way out and fall to the . Your Damage is on the Intake side turbine.,That mounting gasket would in No Way have caused the damage on the intake impeller. Something sucked into it from the air filters back. I/E filters not filtering good,Trash in intake piping,etc inspect very carefully and make sure the correct air filter is even installed. That can happen also someone can replace an air filter with the wrong one ,possible to short or faulty gasket and cause these type issues.

CORRECT!

Re: County Coach turbo replacement (split from Re: Is my turbo dying?

Reply #19 –
What I would be worried about is where did those pieces of the turbo go. Are the hung up on the intake of the after cooler or did they
go through the engine.