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will300
04-12-2011, 12:59 AM
Should I have a thermostat in my 89 tristar? Took it out for the first time and it ran pretty cool but dont know if i should have one for the summer or not. Dont go out much when its cold.

DooSPX
04-12-2011, 09:36 AM
The stock thermostat is 142* for the 351W. My 351 never see's over 140 on the gauge.

ahhudgins
04-12-2011, 10:54 AM
I will be going out for the first time in another week and our water temps are going to be in the upper 40s. Even with the correct thermostat in the block, my temp gauge won't get over 140 for a month or so.

I would still pull the housing and make sure yours is in good shape (not stuck open).