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Old 12-19-2014, 11:02 PM   #1
kab101
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Member#: 321833
Join Date: May 2012
Default New engine/ turbo = smoke

Hey guise,
I bought a 2007 spec B that needed a new short block, but decided to buy a used long block instead and just swap engines.

I purchased a used long block and put it in the car, which had 150 compression in all cylinders when I bought it. Basically the mechanic put the new engine in, but the oil feed lines was leaking so it broke the turbo, crazy amount of shaft play when it came out. I towed it to my house and changed turbos, and removed the filter in the passenger side banjo bolt, and changed the oil. The old oil wasn't dusty or had any metal shavings, and when inspecting the old turbine it didn't look like any metal had shredded off. When I started it a huge amount of smoke came out the exhaust (from the blown turbo), which slowly stopped after driving it for a little. However after driving for a while I noticed that the car still smokes, noticeably when you drive then come to a stop. Oil smelling smoke comes out of the exhaust after accelerating and when I come to a stop it'll smoke while idling for a bit then stop. Also p0021 check engine light came on after driving for about 50 miles, but the car still ran fine, makes 16.5 PSI on the cobb stage 1 tune.

I replaced the driver side OCV and PCV valve out of old blown engine, noticed some white fluid in the pcv black tube that faces down into the block while doing so (from the new long block). Also noticed there was a small pool of oil in the throttle body hose that attaches to the intercooler.
After about 30 miles I get the p0021 bank 2 check engine light again.

Regarding the smoke: No smoke coming out of the oil filler tube, and no smoke on startup. When driving it won't smoke during WOT, but when I come to a stop it'll smoke for about 30 seconds then stop. So basically it only smokes AFTER I really gun. Its hazy and smells like oil, not a big cloud and sweet smelling like antifreeze.

So Iím at a loss, thereís no oil on the turbo manifold and no shaftplay (so maybe the turbos fine), and no oil coming out of the filler tube (so maybe thereís no cracked ringlands).

If any of this stuff means anything to you.. Let me know please. Iím quite lost at this point to be honest. There are no clear indications of a cracked ring land, and neither is there for the turbo being blown. Maybe the valve seals? Crankcase ventilation?

Mods: Cobb catted downpipe, cobb AP V2 stage 1, cobb air intake

Cheers! Sorry for the life story
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Old 01-01-2015, 12:19 AM   #2
kab101
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Member#: 321833
Join Date: May 2012
Default

Bump! Any help would be appreciated
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Old 01-01-2015, 12:38 AM   #3
Shiftace420
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Member#: 383633
Join Date: Mar 2014
Chapter/Region: RMIC
Location: Yampa, CO
Vehicle:
2002 Impreza WRX
Silver

Default

It sounds to me like a PVC issue.

Make sure your PVC valve is holding boost like it should. A proper PCV valve for these cars will not leak at all when closed (under boost).

Napa or other brands leak some when closed allowing boost into the engine crankcase. This causes a bunch of oil to go into the PCV hoses and it is being pulled into the engine under vacuum.

Subaru PCV valves hold pressure when closed and will not leak at all.
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Old 01-01-2015, 12:44 PM   #4
Chapman
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Join Date: Nov 2013
Chapter/Region: NESIC
Location: New Bedford MA
Vehicle:
05 STI
WRB

Default

When the turbo seals went, it likely spewed motor oil all over the inside of your intercooler and plumbing.

Pour out the intercooler of oil, wash it out. Same with the pipes. There might be residuals in your intake manifold as well if it was bad enough.
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Old 01-18-2015, 12:41 AM   #5
kab101
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thanks guys, I replaced the PVC with the unit from my old engine, and cleaned the crap out. it was still smoking after. I drove it for a couple more weeks though and mysteriously it stopped smoking completely. Ill cross my fingers for now and see what happens..
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Old 12-29-2015, 01:26 AM   #6
kab101
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Join Date: May 2012
Default

To update this thread incase anyone has similar symptoms. The engine spun a rod bearing after 1000 miles, I'm assuming because the turbo send bits of metal into the engine. Ended up rebuilding my old short block which fixed the problem.

Regarding the p0021 code, I bought a new OCV and it fixed the problem, if you have an AP you can use it to sync up the readings from both sides of the head to make sure it works. I also removed the banjo bolt filter beside the cam gear on the driver side, however a lot of people say just replace it since it does have it usefulness.

As a lesson, don't take your car to mechanics who don't know what they're doing, and do things right the first time
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