Do turbos wear out?
05-08-2009, 11:11 AM
#1
Three Wheelin'
Thread Starter
Do turbos wear out?
Hi all,
Of course they must eventually... What are the symptoms of a
'worn-out' turbo that hasn't grenaded itself, but has passed it's
prime... ?
Of course they must eventually... What are the symptoms of a
'worn-out' turbo that hasn't grenaded itself, but has passed it's
prime... ?
05-08-2009, 12:59 PM
#2
Burning Brakes
Joe, This is 3rd hand don't know if it's true hearsay but I have been told that you will start to see blue smoke from oil passing by the seals, etc... This is not the sometimes happening blue puff of smoke on start-up but an all the time smoking especially when hitting boost. Grain of salt please.
05-08-2009, 01:37 PM
#3
Rennlist Member
Joe, check out T2's posting in the current oil thread. https://rennlist.com/forums/996-turb...96-tt-oil.html
05-08-2009, 07:37 PM
#7
In a word. Yes.
Typically its the bearings that will fail.
I would recommend rebuilding a turbo at around 60-80k miles or so, replacing all the seals, bearings and checking the condition of the shafts/impellors/housings.
Typically its the bearings that will fail.
I would recommend rebuilding a turbo at around 60-80k miles or so, replacing all the seals, bearings and checking the condition of the shafts/impellors/housings.
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05-08-2009, 08:43 PM
#8
Drifting
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"....might have some bearing"..........."Typically its the bearings that will fail."
Sort of a play on words here? Actually, for most of us, it's a bushing not a bearing. Depends upon what the market will bear.
Sort of a play on words here? Actually, for most of us, it's a bushing not a bearing. Depends upon what the market will bear.
05-08-2009, 09:46 PM
#9
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With the KKK turbochargers we rarely have bearing damage before we have turbine side seal damage and failure. All Porsche turbochargers on 911 (until the 997TT) have relied on oil cooling. The high temperatures will cook the oil>> coking. This material acts like diamond cutting stones. It will wear the turbine side seal bore and sealing ring-grove. All of this wear will happen usually before the bearings will show wear.
However, for myself, I see alot of "user" induced damage>> FOD damage. Debris from the Bypass Valve install, Aftermarket headers FOD damage to the turbine wheels. Small rock dropped in the air cleaner box...
However, for myself, I see alot of "user" induced damage>> FOD damage. Debris from the Bypass Valve install, Aftermarket headers FOD damage to the turbine wheels. Small rock dropped in the air cleaner box...
