Quote Originally Posted by Giovanni89 View Post
One word of caution on running cool. It's a 30 year old gauge, with a who knows how old temp sender, possibly corroded connections.
Interesting observation, makes sense.
Are there any temperature test that can be performed to somewhat get an accurate reading without replacing the sender/gauge? I don't mean continuous accurate readings, like if you had a new sender/gauge, but a specific test you can do. Like running the engine hot and measuring the temp of the coolant, or something like that, and then comparing that to the readings from the gauge.