Originally Posted by F22Who

The owner before me put a big Godspeed radiator in my 89 dx. Not sure why he didn't go with the stock size, but other then added weight oh well. My question is, my temp never gets up to running temp unless I drive the car and let it sit running for about 5-10 mins, but the second I start driving it drops all the way back to cold and the idle jacks back up. My assumption is that the thermostat is stuck open, because even with a larger radiator the thermostat should stay closed until running temp is reached correct? Tired of car idling high because the temp is always too low. New thermostat ya? Thanks

Originally Posted by Freemananana

What? What does everyone think the thermostat does. Maybe I'm wrong, but it's just a switch for the fans. I have seen many cars, mine included for a short period, that don't use the fan switch. They just always run the fans. If your thermostat is stuck open, your fans will always be on. Your car should still reach operating temperatures. The fans really only help the radiator while your car is sitting still. While you are moving the air that naturally passes over the radiator is much greater than whatever those little fans are putting out. If his car warms up while staying still, but doesn't overheat, I don't see how this can be thermostat related at all.

Google how to troubleshoot a thermostat. It tells you to put it in boiling water and see if it opens.X All it does is activate the fans when it opens. It isn't blocking a passage or anything like that at all.

I have something off topic to say. Why is "....."? Is that better than a regular period? I also like caps. It gives the eye a resting place when reading through paragraphs. Something easy to go back and read.