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Joined: Mon Oct 23rd, 2017
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I have replaced the rad cap about a year or so ago. Not sure how it could go bad honestly.
Today the temp dropped and it was right when I was on an incline hill going slowly (rush hour traffic) turning to the right. IE: hill that turns right (clockwise) via an on ramp getting onto the highway.
Started seeing the temp drop and it went to about 170' F. It was like this all the way home (about another 20 minutes) Prior to that temp was at 220' F like normal.
I keep the truck running while in the driveway. Pop the hood and look at things. I unscrewed the degaus rad cap, and what normally happens is that the coolant level goes up quite a bit. This time it did not. It maybe went up half an inch. I thought that was odd. Does that mean it wasn't building pressure or it somehow lost pressure?
I then felt the hoses. The top rad hose was hot, the bottom rad hose was somewhat warm/hot. Checked the hoses to the thermostat and the larger hose was warm, but the little hose didn't feel hot at all. I started squeezing all the hoses, then unplugged the connector on the thermostat, left it undone. Then went back into the truck and saw that the temp started to go back up on the ultra gauge. It was at about 200' F. I checked the little hose again on the thermostat and it was hot now, so clearly coolant was going through it. Plugged the connector back in. Drove to the gym about 20 minutes later and the temp was fine. Drove back home, again temp fine.
The rad cap is cheap I think at around $12 on ebay so that's fine I don't mind getting another one but just seems odd. Never had this problem before.
hmmmmm....?
-Nigel
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2001 XLT 2.3L
~NSG~