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Old 10-13-2021, 03:30 PM
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Cobra Make, Engine: ERA 427 SC s/n 718, 428 FE
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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.
Sounds like a good plan. However, you should leave at least two head bolts loosely attached. 100 psi is quite a bit of air.
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