Running real hot

[z28_xxx]

Thanks for the better explanation! Much appreciated


What year is your car? if 95+ (or is it 96+up,) there are 2 speeds,
low and high. Are you sure they are on HIGH and not just low?

Also - have you ever bled your cooling system after all this work?
- And if so - how did you accomplish this?

thanks

If I remember correctly 160 tstat I installed was a Hypertech and after I put it in I went back into the program to re-set it to 160 just be sure. Yesterday it got to about 85 and in freeway traffic it got to 210. This morning with the temperature about 50 or 60 it was past 185 in traffic. When it opened up and I was able to get some speed it went back down to just below 185. I remember when in similar or worse conditions it would only get slightly past the 185 on the hottest days with the air conditioning on. On cooler days or mornings like today it was a needles width past 160. Now it is reading much hotter than I remember and it is only March. I would rather spend the $500 on the radiator to save my motor.

[soCalTA]

The car is a 97 m6. I can't say it was "flushed" but when they replaced the water pump I would imagine a great deal of new fluid was put back in. As for the fans and speeds I have no idea if when they come on they are the low or high speed. Is there a way to check?

[Injuneer]

It is possible the "fluid" they put back in (aka "coolant") was not the correct kind for your 97? It left the factory with the extended life DexCool. If the system entrained excess air, or they filled it with the incorrect "standard" coolant without properly flushing the system, there's a chance the system may be sludged up, reducing cooling capacity.

If the system hasn't been fully flushed, that might be the next logical step.