Terrible news when I pulled valve cover - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Yukon Jack** · 06-13-2005, 09:00 PM

I put in the tool that thread into the spark plug hole and uses compressed air to hold the valves closed when pulling the valve springs. When I attached the air line there was still some air that was passing in the cylinder with about 100 psi from the compressor. Should there be no air passing or is a little okay when I pull the springs?

Definitely is holding some air as when you pull the air hose off there is a good bit of air pressure built up.

06-13-2005, 09:00 PM	#33
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,689	I put in the tool that thread into the spark plug hole and uses compressed air to hold the valves closed when pulling the valve springs. When I attached the air line there was still some air that was passing in the cylinder with about 100 psi from the compressor. Should there be no air passing or is a little okay when I pull the springs? Definitely is holding some air as when you pull the air hose off there is a good bit of air pressure built up. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

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