Guitplayer, how did you seal off the coolant cap? I was always under the impression the coolant cap relieved pressure above a set amount. I never realized it works as a vacuum breaker.

Last edited by Peggy M; 07/17/2024 3:15 PM. Reason: Remove quote - not necessary ;)
1947.2 GMC 1/2T SWB panel
1947.2 GMC 1/2T long bed
1948 GMC 1/2T short bed