02-18-2007, 05:10 PM
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#4
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Sierra Grande Club
Join Date: Jan 2007
Location: New Mexico USA
Posts: 2,433
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Re: Changing valve seals using air chuck: If I have air leaks are the heads toast?
Quote:
Originally Posted by 84_4x4
to do a cylinder leakage test make sure its TDC of the compression stroke and then if it leaks out exhaust or intake you need new valves or new valve seats
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Anywhere on the compression stroke the valves will be closed.
s/t
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1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe. 
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