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John,
Increasing the pressure rating of the radiator cap does not make the
engine run cooler. The higher pressure will allow the engine to reach a higher
temperature before the cooling system internal pressure overcomes the cap
spring and it boils over. If your engine doesn't run on the high end of the
temp gage, a 7 lb cap is better because it puts less strain on the hoses and
radiator core as the pressure cycles when hot and cold.
Dave
Homstad
56
Dodge D500
Mike:
My
56 Fury calls for a 14# cap, but I'm using a 7# cap. It works
fine. I believe that the 14# cap will allow the engine temperature to
stay at a cooler temperature while running the engine at high rpm and out put
such as during racing.
The bottom hose on the
radiator is the intake for the water pump. If it is collapsing, I would
suspect the radatior cap to be not releasing the vacuum created when the
engine cools off. Collapse of the bottom hose is prevented by a spring
inside. Of course, an old hose will swell and collapse easier than a new
one.
John
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