Intro from an old Assembly Plant guy

[87Bob]

Originally Posted by Keith Seymore

I guess that's not entirely true: I noticed the engine seemed to run "too cool", that is, the needle on the temp gage wouldn't come up to the first mark. Probably running about 140 degrees, and I was concerned that wasn't warm enough to burn all the condensate out of the motor oil plus - with winter coming - I'm going to want some heat in the cab!

So I did replace the thermostat with a new 180 deg stat; that seemed to help, as the needle is now coming up to the first mark on the gage. I'm wondering if that earlier stat (marked as a 180) had some problems.

K

I had heard that there are some problems with sending units reading cold when actually the engine is running at the right temp. The best way to check I'm told is to use an infared gun and check the temp at the thermostat housing. Then you know if it is the sender or the thermostat. As the sender gets hot the resistance is supposed to fall that is why you can check the gage by shorting out the wire to ground and the gage should read full hot.