I am using a vacuum pump hooked to a rubber grommet that is pushed into the neck of the pump tank. I can pump it up to almost 28 inches of vacuum, which should help to pull the air out of the system.
I’ve done the vacuum pull with the engine running, when I get over 26 inches of vacuum the pump will start to squeal, signaling that it has air trapped somewhere. The vacuum will hold steady, so I know there is no other air leaks in the system.
I checked the belt and it is as tight as I can get it.
The fan clutch seems ok, but I will have to double check it’s operation.
I am at a loss
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1971 Trans Am - Sold
1977 Can Am - Sold
2002 Trans Am Firehawk - Sold
2004 GTO - Sold
2006 GTO - Sold
1970 GTO - Sold
1972 Trans Am - Sold
1970 Trans Am - Current Project
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