Hello Jerry,
I could try the block test liquid I suppose, but before doing that I remembered the bubble test, but also decided to check the new thermostat...
1- The bubble test did not reveal anything at all, so I must have some other type of blockage somewhere in the block or cylinder head?
2- New Stant 160 F thermostat did not open at 160F, but closer to 170F and was very slow. It also would not open evenly until about 180F... An old Delco 180F thermostat opened about 170F and was very quick and opened evenly...
I decided to use the Delco thermostat, this time the same thing occurred, only it took a little longer for the coolant to shoot out of the overflow pipe...
So the question after doing this is, could the cylinder head still be a major problem? or is it an obstruction in the block/head, or the fact that '37 216's do not like thermostats... It did not come with one, so I wonder...
Last edited by Philipj; 01/10/2021 8:32 PM.
