Source of oil burn?

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Old Jun 20, 2012 | 08:25 AM
  #1  
crxguy406's Avatar
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From: Billings, Montana
Default Source of oil burn?

Engine is a D15B2. 194k miles. Burns about 1 quart per tank of gas.

1. Absolutely no leaks under the car.
2. Checked and changed the PCV.
3. Checked the spark plugs, they are all absolutely clean.
4. Pulled the oil cap while hot and running, no smoke or evidence of bad rings.
5. Compression tested perfect.
6. Checked the air intake, absolutely no evidence of oil.

What other tests could I do?
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Old Jun 20, 2012 | 08:40 AM
  #2  
TearSDMF89dx's Avatar
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From: C-Bus OH
Default Re: Source of oil burn?

sounds like valve seals they tend to get brittle and cause oil burn
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Old Jun 20, 2012 | 08:54 PM
  #3  
DCRB's Avatar
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From: Portland, OR, USA
Default Re: Source of oil burn?

yeah my buddies 90 laser rs turbo has 300k on it stock stem seals, oil litterally pours out of the exhaust stem seals (just on cylinder 3) and into the turbo and out the exhaust (it drips out of the exhaust manifold gasket if he doesn't tighten it down super hard. any ways the point is stem seals wear out and oil can leak past them into the exhaust or intake, and are a wear item. not TOO hard if you know what you're doing you just have to pressurize the cylinders (take the schrader valve out of a compression tester and use compressed air on the end) to keep the valves seated and closed
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Old Jun 21, 2012 | 03:51 AM
  #4  
crxguy406's Avatar
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From: Billings, Montana
Default Re: Source of oil burn?

Valve stem seals are pretty cheap too! Thanks guys, I'll definitely look into this.
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Old Jun 21, 2012 | 09:02 AM
  #5  
Randysi's Avatar
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From: Short Gap, WV
Default Re: Source of oil burn?

Post pictures of your surgery on the head. lol
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