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Old 10-31-2009, 03:40 PM   #1
moonzie
Scooby Specialist
 
Member#: 128537
Join Date: Oct 2006
Chapter/Region: MWSOC
Location: Bloomington, Indiana
Vehicle:
2004 Baja Turbo
Red/Silver

Default smoky turbo

So for the past 2 or 3 years or so I'd say I've been having this smoky turbo issue. Occasionally it will stink like burning oil, and you can see smoke wafting up from the turbo heatshield area. There are known reports of cracked turbo oil lines which can cause this.

Today I took off the intercooler (what a pita!) and turbo heatshield. I discovered that the lower two nuts that thread onto the turbo's bolts connecting the turbo to the downpipe - one was nearly off and the other was completely gone!

But with the expansion and contractions of this joint, would this cause the turbo to weep some oil sometimes?

I've noticed that it particularly likes to smoke when there's a good rain going on - and it takes a moment of sitting still before you can begin to smell and notice it both in and outside the cabin.

Going to the store to pick up some nuts now.
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Old 10-31-2009, 07:00 PM   #2
moonzie
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Join Date: Oct 2006
Chapter/Region: MWSOC
Location: Bloomington, Indiana
Vehicle:
2004 Baja Turbo
Red/Silver

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Well I didn't see any oil around the oil feed lines, including the place where it typically cracks; it was dry.

I did see oil around in a variety of other places though. Removing the intercooler there was a small film of oil inside the turbo and intercooler, and one or two drips of oil when it came off (from inside the IC) but that's all. I removed the Y-pipe and they too looked fairly clean inside.

But really it seems there was a lot of oil buildup on the underside of the intercooler, closer to the front / throttle body. I don't think the throttle body hose clamps were on very tight; tightened good. The large hose clamp that connects the main intake to the turbo housing was very loose and had a film of oil on it; tightened down good.

suggestions?

I'm just wondering if the internal bearing seals in the turbo are going. That would be the suck, but it might explain some of these oil films.

Could be the PCV valve. I tried to remove it but failed; it's in there REALLY tight, and it's all plastic. There's no clamps on the underside of that fitting it on the tube that feeds to the engine block.
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Old 11-04-2009, 11:12 AM   #3
moonzie
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Member#: 128537
Join Date: Oct 2006
Chapter/Region: MWSOC
Location: Bloomington, Indiana
Vehicle:
2004 Baja Turbo
Red/Silver

Default

350 miles later, no smoky turbo yet (tho it's been dry).

Anyone have any ideas as to how so much oil could build up on the front underside area of the intercooler? Are the turbos susceptable to that much blow-by? I mean I could fab up a catch can, but.. meh.
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Old 11-05-2009, 03:46 PM   #4
hatake
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Member#: 34811
Join Date: Apr 2003
Location: Denver
Vehicle:
04 Baja T
Black

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I think guys at scoobymod have more experiences on these... For one, I've been meaning to take the IC off and clean the whole area - for like 2 years. I'll get it done this winter...now that's 3 years.
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Old 11-05-2009, 10:08 PM   #5
moonzie
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Vehicle:
2004 Baja Turbo
Red/Silver

Default

Pulling the IC off isn't so bad. The only hard thing is separating the IC inlet hose from the turbocharger.
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Old 11-17-2009, 10:38 AM   #6
moonzie
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Join Date: Oct 2006
Chapter/Region: MWSOC
Location: Bloomington, Indiana
Vehicle:
2004 Baja Turbo
Red/Silver

Default

So I left the heatshield off in hopes that next time it started smoking I could better identify where the smoke was coming from.

Today it's been raining and sure enough, when it rains it smokes.

I believe that there may be a film of oil seeping around where the turbine assembly is pressed against turbine housing (intake side). I guess perhaps there's a gasket there that's failed?

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