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Author Topic: Piston is hitting head on new rebuild help please  (Read 11978 times)

Offline WestTexasKing

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Re: Piston is hitting head on new rebuild help please
« on: June 19, 2013, 04:29:51 pm »
The first picture appears to show the piston sitting above the sleeve, I've looked at it numerous times trying to see if it was just an optical trick, but I think that's where your problem is.
Try this....
-Get some thick grease and smear it thinly all over the top of the piston (make sure you get all the way to the very edge of the piston!).
-Install head with gasket and snug the nuts down (don't torque).
-Bring the piston up until it hits the head.
-Remove head and observe where the grease was left (or where the grease was squished off the piston), this will tell you where the piston is hitting and can give us more info to diagnose your problem.
-Take a picture of any findings and post here, then wipe the grease off to prevent spark plug fouling later on.

One of the things it will tell us is if the piston is hitting the head or the head gasket, another thing it will tell us is if the head itself is cut correctly or not (well, partially anyway).

 

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