Onyx Z

iTrader: (3)

I just installed a brand new ACDelco Water Pump on my 98 Z28. When I run it to bleed all of the air out of the system, the temp guage gets to the third mark and the thermostat still isn't opening,so I turn it off. The lower hose doesn't get hot, the radiator doesn't get hot, the water is boiling over out of the radiator. The dealership said to just run it, as long as it doesn't go into the red, it's fine. Has anyone else had this problem, if so, what did you do to fix it? Please help!!!!!!!

Thanks
Ryan

Ditch Digger

Mine did the same thing when I installed my heads and oil pump. It would get real close to over-heating so I would shut it off and let it sit for about half an hour. After doing this three times I gave up on it until the next day. After the car sat overnight the thermostat opened up normally and everything was fine. I believe that in my situation the car had to get up to operating temp and then cool completely before every thing started working properly.

Onyx Z

iTrader: (3)

Mine did the same thing except it had A LOT of air in the system. I just poured the water in each hose and filled it up by until water came out of the other end and turned the pump to help it circulate also. After that it worked perfectly.

StevieZ

iTrader: (3)

Squeeze the big hoses with both hands while the rad cap is open. This will help to purge the air.