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Old 08-10-2016, 07:30 AM   #19
A1971Blazer
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Join Date: Nov 2013
Location: East Tennessee
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Re: Compression good - plug fouling

Quote:
Originally Posted by Ryanz View Post
Sorry, I have never heard of this. Where can I do this?
At the back of the head...under the valve cover....there is a hole cast into the head that lets the oil drain back down into the lifter galley and back down to the oil pan........it's directly behind the #8 cylinder...there's a lot of oil going to the rockers and it has to drain freely out of the top of the head or it puddles around the valve stem...thus getting sucked into the cylinder...

That may not be the issue but I was simply wondering if you had checked to be sure it wasn't partially or fully clogged.......... there are other holes but the engine is tilted slightly and there has to be a lot of oil trapped under the valve cover for it to reach them......

I've seen more than a few with this issue........it's easy to check before digging deeper into the problem...pull the cover off and have a look....
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1967 C10 Step side
1968 C10 Step side
1970 Chevrolet K/5 Blazer
1972 Chevrolet K/5 Blazer
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