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Old 05-19-2003, 03:28 AM   #1
buymeasti
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Angry Blue Smoke when letting off full boost???

So I went on a drive today with some friends and the person behind me said he saw bursts of blue smoke out my tailpipe when I let off boost.


...Thx in advance...
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Last edited by buymeasti; 09-06-2003 at 07:53 PM.
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Old 05-19-2003, 12:03 PM   #2
tekfoc
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sorry to tell you but sounds like you have a bad turbo your burning oil thats why you see blue smoke
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Old 05-19-2003, 12:08 PM   #3
mlambert
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If its just when you lift the throttle then it could be something that a simple catch can could fix. Id check for oil in the intercooler and then leak-down and compression tests, just to be safe.
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Old 05-19-2003, 12:32 PM   #4
Austin
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Quote:
Originally posted by mlambert
If its just when you lift the throttle then it could be something that a simple catch can could fix. Id check for oil in the intercooler and then leak-down and compression tests, just to be safe.
Ditto.

I wouldn't worry too much right now. Just keep an eye on it.
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Old 05-19-2003, 01:14 PM   #5
buymeasti
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Quote:
Originally posted by mlambert
If its just when you lift the throttle then it could be something that a simple catch can could fix. Id check for oil in the intercooler and then leak-down and compression tests, just to be safe.

Thanks for all the help guys, I'm not too worried about it at this point, but at less than 15K miles it pisses me off, especially considering that I dont abuse the car at all.

So help me understand why I could have oil in the IC, and from my understanding the catch can would remove this oil? Would a slightly high oil level contribute to this?

Is this a normal occurrence? Do all people witness this when pushing hard, and it just gets collected by the cats, so the catless people actually observe it? Or is this definitely abnormal in our WRX's?
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Old 05-19-2003, 01:35 PM   #6
cnk
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Oil in the intercooler is usually from the PCV or crank case vents. It's more commonly known as oil blow-by and can occur when you are driving "enthusiastically". The oil catch can routes the lines for the crank case vents and PCV to a catch can that contains a baffle to remove the oil from the air. The air is then vented back to the intake track.

Having too much oil in the car could also cause your problem as it's not a good thing to have too much, hence the Full mark on the dip stick. You could try to siphon some out if you truly are over, or just let it burn off if it's not too much extra.

Almost everyone I know has a little oil film in their intercooler and piping. As for the cats catching it. . .maybe, but then you really wouldn't want that since they could get clogged and cause more backpressure. It's normal for there to be oil in the intake track from oil blow-by, but not for it to be visible from the exhaust.

Calvin
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Old 05-19-2003, 01:44 PM   #7
buymeasti
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I think I was 1-2 MM over the full mark on the dipstick, Im usually very careful about the oil levels except this last change I was too much in a rush to add, check, add, check if you know what I mean...

Im hoping a little too much oil and catless caused the smoke, altho I agree that nobody should see blue out the tailpipe. I know lots of turbo entusiasts that have blow by issues but like you said, never enough to see thru the tailpipe...

As for the cats, Im not suggesting that its a good thing but I was just wondering if a little blow-by is normal and just hidden by the cats (I was behind a fellow WRX with cats, he was pushing the same as me, has twice the miles, but no smoke).

Thanks for the suggestion on the catch can, maybe I'll look into it...although it seems like something that alleviates symptoms and not the problem overall.

I guess at this point there's enough oil in the IC to justify cleaning it...
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Old 05-19-2003, 04:23 PM   #8
joeyvaz
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I had a similar problem, except that the blue smoke was present at idle. Turned out to be a blown turbo, which I had replaced under warranty. Hope you have better luck than I did, but better that it happen now than after your warranty expires.

later,
Joe
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Old 05-19-2003, 04:36 PM   #9
wrxs4me
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Depending on his dealer and whether he swaps his stock parts back on, his warranty may have already expired since he has an uppipe and catless turboback.
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Old 05-19-2003, 05:14 PM   #10
buymeasti
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Quote:
Originally posted by joeyvaz
I had a similar problem, except that the blue smoke was present at idle. Turned out to be a blown turbo, which I had replaced under warranty. Hope you have better luck than I did, but better that it happen now than after your warranty expires.

later,
Joe
Thanks,

Im chalking this up to silgtly high levels of oil, which is now corrected. If the problem persists with "normal" oil levels then I'll pursue further tests.
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Old 05-19-2003, 05:28 PM   #11
RiftsWRX
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Quote:
Originally posted by buymeasti


Thanks,

Im chalking this up to silgtly high levels of oil, which is now corrected. If the problem persists with "normal" oil levels then I'll pursue further tests.
Heheh... ironically... I get oil burn when I'm under light loads, and none at all under boost. Gotta love total seal rings.

They are such a pain to seat

Jorge (RiftsWRX)
www.ProjectWRX.com
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