Quote:
Originally Posted by rkleypas
Chad,
I still need to check the temp at 2000 rpm. I took it out for a drive last night and it did great. When I got home, I idled it for 5 minutes and it got to 250. Grrr. Fans are running. I'm starting to wonder if the water pump is weak since I could not see any flow in the radiator with the cap off. If I rev it with the cap off and see movement, perhaps the water pump is weak? Something has to explain why it cools perfectly while moving and starts to climb at idle; again, fans are running to the tune of a jet engine.
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2K rpm is just a random number well above idle. The reason I'm pushing is that your symptoms sounds very similar to my own. I also thought weak waterpump and even went as far as to ship it back to the manufacturer to have it tested. Turned out I still had air in the system despite over 2k miles of street driving...
Mine wouldn't get to 250 at idle but it would get to 215/220 at low rpm. I first realized it was engine speed when I downshifted to go pass a car on a steep grade on the freeway. I was cruising along at 70 mph and 1600-1700 rpm in 6th gear. When I got stuck behind a car I quickly downshifted to 4th and passed the car at 3,000 rpm plus. In the handful of seconds it took to pass the car my temp dropped 10* due to the high RPM.
Getting all the air out of my motor wasn't easy.