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oil in spark plug #1 cyl


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Anonymous Poster
tmack2@optonline.net

Nov 9, 2006, 7:11 AM

Post #1 of 6 (1920 views)
post icon oil in spark plug #1 cyl Sign In

Went to change plugs in01 Subaru Outback with 115,000 mi, pulled boot off #1 plug and was greeted with engine oil oozing out. I know this is not good, any ideas? thanks in advance


Tom Greenleaf
Ultimate Carjunky / Moderator
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Nov 9, 2006, 1:38 PM

Post #2 of 6 (1913 views)
Re: oil in spark plug #1 cyl Sign In

Is this an internal leak? Like does the firing end of the plug have a problem?

Sometimes a bad gasket in a valve cover can do this if external, T

I should move the post but won't right now........



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Anonymous Poster

Nov 10, 2006, 6:18 AM

Post #3 of 6 (1911 views)
Re: oil in spark plug #1 cyl Sign In

Not sure if it is internal leak, but that is my guess. The spark plug wires on this Subaru cover the entire opening so when I poped off plug wire oil was in & coming out of plug area. But was quite a bit of oil, did not pull any other plug wires yet. Hooked it up to OBDll beforehand and code read out needs tune-up. Car still runs and oil dipstick shows full.


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Nov 10, 2006, 7:06 AM

Post #4 of 6 (1908 views)
Re: oil in spark plug #1 cyl Sign In

This is going to be tricky! I suppose that if the plug wire's boot can hold oil in that it is not letting any possible external leak let oil in. Unsure About the only thing I can think of is a flaw in the head.

In the absence of an overheat along the way this would have been a flaw waiting to happen since it was new. I would talk to a Subaru dealer and find out if there's a recall or a TSB on this as it will be pricey to fix this, T



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Anonymous Poster

Nov 10, 2006, 9:29 AM

Post #5 of 6 (1907 views)
Re: oil in spark plug #1 cyl Sign In

after further inspection i found oil in #2 plug hole as well but i plulled the plug and it appears as the leak may well just be valve cover gasket on that side of engine.


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Nov 10, 2006, 11:35 AM

Post #6 of 6 (1905 views)
Re: oil in spark plug #1 cyl Sign In

I hope it's just a gasket! You could possibly test for an unseen leak using a non flammable powder and see if it leaves evidence, T







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