Join Date: Apr 2002
Thanked 0 Times in 0 Posts
Indecisive coolant system
[warning: I'm going to go into a lot of detail here, so maybe one of you can figure out what is going on]
I've been having problems with my truck getting hot periodically. It must have a pinhole somewhere that allows it to leak very slowly. Every couple of months I have to fill the radiator up again with water.
I just did this a couple of weeks ago, and while I was filling it up, i'd start it up and let it get hot, then turn it off and let it cool off and then add more water. The wierd thing is that I had at least 3/4 full radiator and it would still go up to the L in NORMAL then after hanging there for quite a while, I could hear water rushing into the heater core and the temp dropped immediately. I thought maybe it was an air bubble or something, so I didn't think anything of it.
Well, this morning, I let my truck warm up and headed the 30miles to work. As I got into town, I noticed that my heater wasn't as hot as I thought it should be. I then noticed that my temp gauge would go up and down, inversely proportional to how much gas I was giving it. When I was braking, it would hit the AL, and when I was just driving it would hit the O (where it usually rests).
Can someone give me any guesses on what might be going on here? Could it be the water pump going out, or maybe just some crud in the water lines? Thanks in advance!