I just replaced the water pump on my 1993 LT1.

I have tested the pressure, and it is fine, but my temp is skyrocketing within the first few minutes of driving.

Now all fluids are steaming hot, and i have a suttle squeak like fluids are getting on the belt.

I bled air from the piece above thermostat and the one on the hose to the left. Nothing comes out of the bleed screw near the intake.

Any ideas on why im overheating and what the noise could be?

Thanks.
Mark

 

noise could be the belt or theres a small leak somewhere and its squeeling when the cooling system pressures up. you need to blead these things more than once.

 

make sure the radiator is full while bleeding it. park the car as steep a hill you have in your area, park with the front of the car on the up side. let cool, fill radiator, with the radiator cap off open the bleed screws one at a time and close them when coolant comes out. refill radiator as needed. the bleed screw on the hose will not bleed untill the car is started. soo once you have bleed the lower screws, mine has one under the tb, one on the thermostat cover and one on the hose that is next to the alternator, this is the one that will not bleed without the motor running. anyways once you have fluid coming out of the other or others then with the cap still off start the motor and bleed the hose screw till fluid comes out, check coolant level in the radiator and fill if needed and put the cap on. take the car for a ride around the block and rebleed the screws without removing the radiator cap. then let it cool and do it again from the start to see if air is still there if so repeat till you get no air on the re bleed.
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Ive been following these steps, and there was no air on the second rebleed. But for some reason, the car is still getting very hot after a 5 minute drive, but not when idling?

Any ideas?

Thanks

 

Check the thermostat

 

I have to ask so don't be offended...you did remember to take that short connector drive shaft off the old pump and put it on the new pump?

 

may have a stuck thermostat. if you got a new one did you get the correct style therostat and in the right way?
http://www.shbox.com/1/tstat.jpg

 

The thermostat is correct and working. I have been bleeding it for the last few days and it seems to be getting better, but i am not sure if im doing it right. I have had the fans going. Should they be off, and would this make a difference? And to answer a previous question, yes i did remember to reinstall the shaft connector for waterpump.


Thanks for the help