[GTX JOHN]

Big Block Mopar with CSI Pump and Aluminum
crossflow radiator.

Every time we run the system after 10 Minutes or more
sitting time.....it has lost prime and does not move a drop of water.

To prime I squeeze the hose for up to 30 seconds or put a small amount
of compressed air (10 PSI) thru cap on radiator with a rag around hose. I
can not find any leak.

I have flushed entire system several times and back flushed and
was not unusually dirty for a few year old racecar.

Replaced hoses with molded ones thinking they might be the issue.

Is there any utility to raising the stat housing with an extension and
putting the cap there like a dragster.

Everything is in OEM location and current cap is highest point in system.

Pump circulates like crazy once it is primed.

Thanks,
Racing next week and a new car to us.