I'm having problems with my van
overheating but only when it's less than 60
degress. It was fine all summer but with
our first cold night it said low coolant. It's
going somewhere but we can't find out
where and the heads are low then we
bleed it and it's OK for a couple days
You need to find the leak, that is probably why it is overheating. Due to low coolant levels or a head gasket issue. You can use a coolant pressure test gauge, warm the engine up to operating temperature and get under the car and hood to look and smell for leaks, and or perform a cylinder pressure test. Did you check your oil? How is the transmission fluid and levels? You want to check if coolant isn't migrating to other systems. Could be an trans cooler issue as well.
Not going into oil or transmission fluid. What is a trans cooler
Looking for a Used Montana in your area?
CarGurus has 464 nationwide Montana listings starting at $525.
Search Pontiac Montana Questions
Pontiac Montana Experts