My car started overheating (all the way into the red on the temperature gauge). Its got coolant in the resevoir, so it not that its short on coolant.
After a few minutes of driving, then the temp starts climbing, but then it goes back down for a bit, then raises up into the red.
What makes this really strange is it seems to cool down VERY fast. Like I can drive it again in 15 minutes as if it wasn't overheated.
Any thoughts on what this could be? Thanks