On my '89 Dodge B250 camper van with a 318 engine, I noticed on a long trip today that the temp gauge never got above about the 1/4 mark…definitely not close to halfway up the gauge. I’m wondering if the stat is stuck open. It looks easily accessible at the top front of the engine, and new stats are cheap, so I’m thinking of throwing a new one in there tomorrow.
Looking at parts online, I see that I can get a 160, 180, or 195 degree stat, all of which will fit my 318 engine. What is the correct temp for this application? (camper van with an extended body and fiberglass high top, so it’s heavier than stock, mostly summer driving, I expect…)
And, what are the consequences of installing a stat with an improper temp range?