 Oil in Exhaust |
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| Mikemo44 |
 Aug 4 2025, 10:11 AM
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#1
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Newbie  Group: Members Posts: 8 Joined: 26-August 23 From: Chicago Member No.: 27,543 Region Association: None  |
Hi All, I have burnt and unburnt oil coming out of the exhaust on cylinder 2. Compression and leak down tests were both good. Looking for suggestions on how oil could be getting in/exiting the exhaust? Some searching suggests a worn exhaust valve guide?
The car doesn't have an exhaust on it, so I am able to put eyes on the exhaust port. Thanks, |
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| porschetub |
Aug 6 2025, 10:55 PM
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#2
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Advanced Member Group: Members Posts: 4,902 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
QUOTE(Mikemo44 @ Aug 5 2025, 04:11 AM)  Hi All, I have burnt and unburnt oil coming out of the exhaust on cylinder 2. Compression and leak down tests were both good. Looking for suggestions on how oil could be getting in/exiting the exhaust? Some searching suggests a worn exhaust valve guide? The car doesn't have an exhaust on it, so I am able to put eyes on the exhaust port. Thanks, What the results of both compression and leak down tests, one mans good can be others mans not so good . Have you done a valve clearance check/reset ? ...pointless doing the above checks otherwise . Watched the vid and that cyl is burning a lot of oil sadly hence my comment on what your results on the tests were . Cheers. |
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| Mikemo44 |
Aug 7 2025, 08:23 AM
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#3
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Newbie Group: Members Posts: 8 Joined: 26-August 23 From: Chicago Member No.: 27,543 Region Association: None |
Compression on all 4 cylinders ranged btwn 115-123 psi. Only performed leak down on Cylinders 1 and 2, showing approx. 7-8% loss. I have checked and rechecked the valve clearances 3 or four times.
I have the engine out and waiting on a valve spring compressor tool to arrive today to take a look at the valve guides. Appreciate the help. Will report back once I get the valve disassembled. QUOTE(porschetub @ Aug 6 2025, 11:55 PM) QUOTE(Mikemo44 @ Aug 5 2025, 04:11 AM) Hi All, I have burnt and unburnt oil coming out of the exhaust on cylinder 2. Compression and leak down tests were both good. Looking for suggestions on how oil could be getting in/exiting the exhaust? Some searching suggests a worn exhaust valve guide? The car doesn't have an exhaust on it, so I am able to put eyes on the exhaust port. Thanks, What the results of both compression and leak down tests, one mans good can be others mans not so good . Have you done a valve clearance check/reset ? ...pointless doing the above checks otherwise . Watched the vid and that cyl is burning a lot of oil sadly hence my comment on what your results on the tests were . Cheers. |
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Posts in this topic
Mikemo44 Oil in Exhaust Aug 4 2025, 10:11 AM
Mikemo44 Here is a video of the cylinder in question:
wH9... Aug 6 2025, 02:58 PM rhodyguy Spent valve guide? Aug 6 2025, 04:22 PM Superhawk996 Compression test - you’re clearly burning oil
... Aug 6 2025, 06:32 PM
Mikemo44 Quick update. I removed both exhaust and intake va... Aug 7 2025, 12:00 PM Superhawk996 Going to try to offer some constructive advice wit... Aug 7 2025, 12:29 PM 930cabman Oil ring(s) stuck? Aug 7 2025, 02:56 PM Artfrombama Am I seeing a gap around the intake valve guide?
Aug 7 2025, 05:57 PM |
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