Pontiac stopped drilling those added center block deck cooling holes because the newly designed timing cover with its two Round seals and baffle was far more efficient then the one used into 1966.
These so called cooling holes where not to help the whole motor to run cooler, be just the high heat center Exh port area and as such reduce the head gasket burn out issue they would have.
If you motors water pump and cooling system can hold a good temp in terms of hanging near your choose T stat temp when at speeds above 30 mph, but can't do so at idle conditions then you have one of two, or a combination of two problems.
Either your not moving enough coolant at idle, and or your not moving enough air at idle!
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs!
And he was not talking about 1/8 or 1/4 mile ETs!
1) 1940s 100% silver 4 cup tea server set.
Two dry rotted 14 x 10 Micky Thompson slicks.
1) un-mailed in gift coupon from a 1972 box of corn flakes.
Two pairs of brown leather flip flops, never seen more then 2 mph.
Education is what your left with once you forget things!
|