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Old 10-13-2021, 05:25 PM
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Quote:
Originally Posted by cycleguy55 View Post
You might try using air. Make sure all the head bolts are loose or removed. Put a fitting in one of the spark plug holes in an end cylinder (not the one with the broken valve) and pressurize it. Area of a 4.36" bore is 4.75 sq inches, so 100 PSI is 475 lbs pressure pushing up on the cylinder head.
Bore size is irrelevant. 100 psi from an air line into the cylinder will still be 100 psi.
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