Re: 1950 Packard 288 Auto overheating HELP

Posted by JD in KC On 2010/1/28 21:22:32

For what it's worth, I had the same symptoms when I first got my '50 Custom (356, Ultramatic). At speed (35-55) the temperature gauge would hover just between midpoint and hot. While idling, it would creep rapidly towards hot.

My problem turned out to be a 180F thermostat that was not opening completely. I replaced it with a 160F NAPA thermostat ($6.87) and the temperature gauge has remained midpoint ever since even on hot, humid days.

I read that you replaced your thermostat, I don't suppose it's possible that your thermostat was installed backwards (upside-down)... it's been known to happen.