Well....you guys got me to thinking about my overheating problem now!!!
I changed over from a MP viscous drive fan to the HHR electric fan about 4 months ago.
I then noticed that the car was not cooling down as it normally would,and the lower rad hose was always quite cool where as the top hose was singin' hot. The fan wanted to run almost continuously.
So....this thread got the best of me so I took out the Source pump tonite and put in a MP aluminum one.
Result......the car will sit and idle now with the fan cutting in and out at about 185*....just over the stat temp of 180. It hasn't done that for months!!!
I'm sort of thinking that the curved vane design is not as good as the old "paddle wheel" set up on the Mopar pump and it wasn't pumping as hard. What d'ya think???
I'll find out this Friday at our Outlaw Shootout because it's been pretty hot lately and once I get down to the last few cars, the hotlapping usually takes it toll.
Lets hope.....