Why don't you want heat in the engine? Burn your fingers? Gas expensive? Why do engine builders use deck plates and run hot water through the block when boring & honing? Cam manufacturer says HOT. My junk is 140-150 going into the water, not 70. I just going to warm it up, let it heat soak for a few minutes and run the valves. Then I know and not guessing.

If the results don't match the theory, change the theory.