Denny,
I had my head off this summer because of a stuck valve. It turned out that the previous shop put it together without addressing the worn guides. In addition, it had a crack in #3, along the bottom edge of the exhaust well. I had the crack stitched up and it seems to be OK. I ran the motor last year for a bit with no thermostat and no pressure. As soon as I put in a 180 deg thermostat and a 7 lb cap, antifreeze started to disappear. I now run a 160 with no pressure.

I have also discovered that warming the engine for five minutes and then retorquing the head after installation is absolutely essential. This procedure is not specified in the Chev manual for 1951 but it is in the GMC manual and also the manual for 1955. I found that the torque values dropped from 80 to 60 or less after the engine was run for the first time.

Fred

Last edited by truckernix; 10/31/2008 2:48 AM.

1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed


My Chevy Master 4 Door is on the Road!