Missing bolt


New Member
I found a bolt on my oil plug when changing oil the head is 9/16 and its 1 1/2 inchs long any ideas on what end to tear apart


Well-Known Member
Staff member
I would be very thankful that thing is still in one piece.....

Then I would be dropping the pan and inspecting.


Friendly Neighborhood Former Technician
9/16, assuming it’s a C-15 it doesn’t belong as those have all metric bolts. Older stuff. Bout the only thing I can think of with a 9/16 head bolt through it are timing gears and the oil pump. If you have an old 34 or 38 series they could be out of the rocker shaft and fell down the oil drain back hole in the back of the head.

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