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Old 11-06-2020, 11:27 PM
PontiacJim1959 PontiacJim1959 is offline
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Join Date: Dec 2019
Location: Gastonia, NC
Posts: 492
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Quote:
Originally Posted by John O. View Post
Going to flush out coolant and change thermo. Car runs around 180-190 in the summer. Never runs hotter. Problem is I replaced temp sending unit today and started car up and immediately watching radiater, coolant was flowing through it and it was a stone cold engine. Outside temp 70. seemed to run fine all summer unless it just stuck open today. Dont know how old anti freeze is so figured I would drain and fill. What thermo would be best 180?
If no issues, stick with what works for you. 180 would be fine. If you do any cold weather winter driving, then 195 so as to get some heat in the engine/heater. Keeping the engine cooler is good in helping prevent detonation IF you were having any. I like to run a 160, but that is me.