broker-len Posted September 26, 2021 Share Posted September 26, 2021 have a 4 cylinder PA 180 thermostat if out side air is 85 or above seems to keep motor cool until stop,,,,traffic light !!!!!! temp seems to go up rather fast and cools down only after a steady clip if idle too long could go to 195 degrees maybe rad is clogged !!!!! looking for other experience with these cars Link to comment Share on other sites More sharing options...
31plymouth Posted September 27, 2021 Share Posted September 27, 2021 How old or what condition is the radiator core? My PA never goes above 150. Parades are no problem. I read on these forums that Evaporust has been used to clean cooling systems. Link to comment Share on other sites More sharing options...
Canadian PB Kid Posted September 27, 2021 Share Posted September 27, 2021 My heater core was plugged and I used a mixture of citric acid & tap water to clean it out, filled it up, let it soak for a couple days, now water flows at full rate, Is the water pump moving enough coolant... impeller? Dave STAY SAFE! Link to comment Share on other sites More sharing options...
ArticiferTom Posted September 27, 2021 Share Posted September 27, 2021 Try changing to a LS1 /160# stat . The number listed is when it startes to open and may take up to twenty more degrees to reach , full . Get one with by-pass hole or add your own . The factory manual call for 180 degree . BUT that was when they where running alcohol system . If that does not do it your system is restricted . My 160 runs me at 185 +/- . For more info on cooling systems search a site called How Things Work . Tom Link to comment Share on other sites More sharing options...
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