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oil on plugs
http://www.4g61t.org/forum/viewtopic.php?f=22&t=3254
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Author:  xlr8 [ Wed Mar 12, 2003 12:45 am ]
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Well whatever you do, make sure you do a compression test before you yank the head off. I'd hate to see someone go through all that BS and find that it was just a cracked rocker cover or some such.

If its only leaking under boost it may be that your getting alot of blow-by which is pressurising the crank case and forcing oil past the rocker cover gaskets - at least its a theory. A leak down test will tell you what condition the rings are in.

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