One thing that hasn't been mentioned here is a collapsing rad hose and I think it could also cause this effect. Sometimes a rad hose will flatten with the higher engine speed and deny the engine the coolant flow rate that it needs.


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!