C 40 323.5 correct thermostat for '48 Crown Imperial Limousine

thomasrc

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I read in the service manual the temp range is 157 - 162, & will be fully open @ ~ 183. Bought the car in Jan 2024, nearly 100% original, with 48k miles from a mechanic who got it running last year. He owns a shop & works on a lot of cars, and can't remember if he took the thermostat out, or not. The radiator has been flushed, some hoses replaced & it tends to runs hot, generally when driving faster on the fwy. Temporarily installed a new temp gauge to get an accurate idea of the true temp, which is working upwards of 230 (or just under) or so. It seems to be losing water/anti-freeze, the head gasket is not blown. Looking around online, seeing several "correct replacements".....but can't be sure. I'll reach out to MoparMall tomorrow & see what they recommend to replace (or install) the correct thermostat. But, I hoped some of you fine folks could help me! Thanks in advance.......
 
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