Ok I have a 95 LT1 transplanted into a 89 Camaro. The problem I am having is, tonight I drove it around and the temp gauge would not go past 150. That was with the fans off. I brought it home and let it idle in the driveway. The temp got up to 215, fans did not turn on, however coolant started pouring out the overflow. I pulled the fan switch out of the waterpump, and there was plenty of coolant coming out of there. The radiator has a aftermarket cap on it. Any ideas what my problem is?

 

The factory setting for the fans is 215 or 220 (i can't remember). Have you reprogrammed the computer to come on at a lower temp? If so, you need to make sure the relays and the wiring are correct. Also, make sure the thermostat is matched to the fan temp that you have set. If that checks, you most likely have air in the system. This is why the factory has several air bleeds on the cooling system. So, double check the fan wiring, and then cycle the engine completely a few times to make sure the air is fully out of the system.

 

Can anyone give me an exact process to bleed the cooling system? Also at 215, it really should not overheat should it? Thanks.

 

Bleeding the LT1 is a pain. Here is what I recommend doing, but you don't have to. The tanks on the radiator are plastic and can be removed. Get the tanks off a 4th gen LT1 car and replace the driver tank on your radiator. If you notice, the outlet is posititioned toward the middle of the tank instead of the top. This will keep the hose completely full of water, instead of sucking in air, when the water level drops in the radiator. If you choosed not to do this, Make sure the radiator is completely full of water and loosen the bleeder screw on the tstat housing under the throttle body. this will bleed most of the air out. Hopefully you have an overflow tank and it should be filled to the proper level as well. start the car and when the coolant starts to come out of the radiator, put the cap back on. Make sure the tstat opens and then when the car gets to operating temp, turn it off. As the car cools, it will replace the air in the system by bubbling it through the overflow bottle and sucking in coolant at the same time.

 

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