R56 Turbo soot / leak?
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Turbo soot / leak?
The car has 45,000 miles, throws no codes, has stock downpipe, runs really well and boosts to about 13-14psi with the stock map and 16-18psi with a tune.
The problem is that I've noticed soot building up on the oil line, as seen in the pictures. It also builds up over time on the underside of the hood. About two years ago I tightened the clamp that connects the downpipe to the turbo exhaust housing but the soot buildup continued and has gotten slightly worse more recently. The car uses about 1qt of oil per 1500 miles and has done so since new.
Any ideas what might be the problem?
The problem is that I've noticed soot building up on the oil line, as seen in the pictures. It also builds up over time on the underside of the hood. About two years ago I tightened the clamp that connects the downpipe to the turbo exhaust housing but the soot buildup continued and has gotten slightly worse more recently. The car uses about 1qt of oil per 1500 miles and has done so since new.
Any ideas what might be the problem?
#2
Time to replace it. That is not soot that looks like oil. It happens, I would suggest this kit http://www.detroittuned.com/detroit-...urbo-oil-line/
and get one of these with it http://www.detroittuned.com/mini-gen...e-heat-sheild/ and if you are feeling really froggy get one of these http://www.detroittuned.com/detroit-...-oil-line-kit/
and get one of these with it http://www.detroittuned.com/mini-gen...e-heat-sheild/ and if you are feeling really froggy get one of these http://www.detroittuned.com/detroit-...-oil-line-kit/
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#8
So the turbo turbine shaft rides in a journal bearing floating on oil. On both ends of the housing are metal clips or seals. These seals should hold that shaft from in out sloppy play. If there is play, then time and wear has taken its toll.
You can remove the fresh air side of the turbo hose at the turbo and carefully check the compressor wheel and shaft for play. You don't want to damage those fins etc. But see if you can push/pull that shaft in and out. I can't tell you what the tolerances are, but if there is enough play then there is cause for speculation that oil is getting out of the turbo housing on both sides. That would mean some of your oil is going to your intercooler and some going into your catalytic converter.
If you want some more tests to do, then you could check the intercooler for oil and also you could attach a backpressure gauge to the top O2 sensor hole and check the pressure. That would tell you if the Cat Conv is clogging reducing exhaust flow.
OEM new turbos are pricey in my opinion. There are several shops that will rebuild yours. I ended up buying a rebuilt one from JMturbocooper.com and returned him my core.
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#10
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#11
IMHO you should also do the oil filter housing gasket & heat exchange gasket. all in the same are a rough and the gaskets are known to leak...saves doing them later. I had mine done same time...also did a Downpipe since it had to come off...
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