the air psi needed to hold the vale up will definitely not push the piston down. the main benefit to using air is it holds the valve all the way up nice & tight & makes adding the locks & new spring while using the spring compressor tool much easier.
I agree. Sometimes the seal holds it good sometimes it slips down getting the locks back on is a pain.
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Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune 13.43@103.4
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
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