The reason for a thermostat is twofold:

1. provides a constant temperature for the engine
2. Provides pressure, through throttleing, to increase the boiling point.

Without a thermostat, the cooling system runs at a lower pressure that causes steam pockets to develop. Sections of the head and block and be damaged.

Always run a thermostat. Your engine will love you.

__________________
Regards

Warren

Currently 1965 220Sb, 2002 FORD Crown Vic Police Interceptor

Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL

ENTER > = (HP RPN)

Not part of the in-crowd since 1952.