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Old 09-14-2016, 12:13 PM   #1
psshhhaa
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Member#: 357158
Join Date: May 2013
Vehicle:
2005 Saab 9-2X VF48
Deep Blue

Default 15% Leakdown Cyl 1, Blowing White Smoke through Exhaust Intermittently

Hey Everyone, I am hoping to diagnose a problem and determine what strategies I have to maintain the longevity of my engine.

Compression test results: cyl 1-4, 175, 170, 165, 170
Leakdown test results: cyl 1-4, 15%, 5%, 6%, 8%

Symptoms: Engine is leaking a bit oil on the header somewhere near the heads. It seems more sweating then it is dripping constantly. Every so often, the car will blow white smoke at idle (quite a bit) or when cruising (small puff). I check my oil levels often and shows no signs of oil consumption but it seems like my coolant levels are dropping (from the expansion tank). I can smell coolant and oil burning sometimes (I know what the scent is like). I don't overheat when driving at least not yet. WOT pulls show consistent boost, no smoke.

On my AP, normal coolant temps when cruising is around 194-196F. I don't know if my turbo is bad.

Mods: 2005 Saab 9-2X EJ205 VF48, Sti Pinks, STi TMIC, uel headers, turboback exhaust 18.5psi tune on 91 octane. Engine is at 87000 miles, been on stage 3 for 7000 miles. Engine was compression tested and leak down tested prior to the mods and showed good #s.
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Last edited by psshhhaa; 09-14-2016 at 01:17 PM.
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Old 09-17-2016, 07:27 PM   #2
j-feagin
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Member#: 292372
Join Date: Aug 2011
Chapter/Region: RMIC
Location: Teller County, Colorado
Vehicle:
2002 wrx
midnight blue

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Need to isolate your cyl leakage, listen to engine closely while doing leak down test. Hissing in intake, exhaust pipe, or crank case? Burning oil prob weak valve cover bolt seals letting valve cover gasket leak. coolant smell from engine bay or exhaust?
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Old 09-21-2016, 09:39 PM   #3
borgomen
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15% isnt anything TOO crazy. did you perform the test or a shop? if you pressure test the cooling system does it hold? If so, get your hands on a camera to look into the cylinder for any type of coolant droplets
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Old 09-27-2016, 03:56 PM   #4
psshhhaa
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Member#: 357158
Join Date: May 2013
Vehicle:
2005 Saab 9-2X VF48
Deep Blue

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thanks for the recommendations. leakdown test was done at a shop. I will try the pressure test idea
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Old Yesterday, 12:04 PM   #5
rtv900
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Location: philadelphia
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2016 STI

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Quote:
Originally Posted by borgomen View Post
15% isnt anything TOO crazy. did you perform the test or a shop? if you pressure test the cooling system does it hold? If so, get your hands on a camera to look into the cylinder for any type of coolant droplets
agreed, 15% really isn't that much
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