Join Date: Jun 2001
Thanked 0 Times in 0 Posts
Re: More On Operating Temps ??
Your thermostat is probably going bad. The temp will fluctuate a little but should stay at or above the thermostat temp. 210 is normal for a 195 stat, 180 is a little on the cool side.
Here's exactly what's happing from my point of view:
The thermostat's not closing all the way, and water is leaking through it. Since you have an electric fan, the lack of airflow allows it to warm to normal temp when sitting still.
Once you get up to highway speeds, you don't need a fan anymore, there is enough airflow to cool the engine. Since the thermostat's not closing all the way (asuming that's what the problem is), the engine is quickly overcooled.
I think I'd start by changing the thermostat. The stat for you fan could be bad also, I guess, but that would cause the problem you describe. There should be no water flowing through the radiator until you reach 195, so, even if the fan were running all the time, the engine should still maintain proper temp (like it did in it's stock state with the engine driven fan).
Hope this helps. [img]/wwwthreads_images/icons/tongue.gif[/img]
'97 Sidekick Sport