thread size?
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More Turbo
Joined: Sep 2011
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thread size?
On my ford 312 cylinder head on the driver side it is missing a screw in plug. This plug is located on the rear of the head near the intake port. Anyone know the thread size?
thanks
Jerry
thanks
Jerry
Lead Driver
Joined: Dec 2012
Posts: 9,732
Likes: 823
From: Wentzville, MO
It’s a course thread 1/2 or 9/16s. It’s not the thread size that’s the problem it’s the length. If the bolt is too long it hits the push rod. Leave it out and it will blow oil out of the hole.
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