Thermostats

rnoswal · 08-26-2005, 03:50 PM

Take out the radiator and get it cleaned out. Before you put it back in, blow out the lines with clean water, open drain on side of engine. Pull the hose ends off the heater and flush that out too. There is a radiator flush you can try from the local part stores. Then fill it up with plain old water and try to find the tester for head gasket leak I have heard others talk about on this forum. That at least should let you know if the gasket is leaking.

It is amazing just how fragile the head gasket seems to be on these cars. The last quite a while stock but eventually they do start leaking, like all cars do. It is not always a blown head gasket when the engine starts to overheat. Water leaks, fans not working, fan clutch not working, etc. I still think the car needs a bigger radiator. I put one in mine and it works great and it has been over 100 each day for quite a while. I put an electric fan on it and I love it!

I have gutted the thermostats in a lot of my cars and they all ran too cool. It doesn't always work that way, but I thought the Supra would react the same way. You just can't have any air in the system with these cars either. Make sure your radiator cap is working right and allowing water from the purge tank to be sucked back in the system as it cools down.

Let us know how it works out. Driving in this heat is a pain in the ass with an overheating car. Too hot to run the heater...lol.

Russ

08-26-2005, 03:50 PM	#9
rnoswal Lexus & 550's Join Date: Apr 2005 Location: Bossier City LA Posts: 556	Take out the radiator and get it cleaned out. Before you put it back in, blow out the lines with clean water, open drain on side of engine. Pull the hose ends off the heater and flush that out too. There is a radiator flush you can try from the local part stores. Then fill it up with plain old water and try to find the tester for head gasket leak I have heard others talk about on this forum. That at least should let you know if the gasket is leaking. It is amazing just how fragile the head gasket seems to be on these cars. The last quite a while stock but eventually they do start leaking, like all cars do. It is not always a blown head gasket when the engine starts to overheat. Water leaks, fans not working, fan clutch not working, etc. I still think the car needs a bigger radiator. I put one in mine and it works great and it has been over 100 each day for quite a while. I put an electric fan on it and I love it! I have gutted the thermostats in a lot of my cars and they all ran too cool. It doesn't always work that way, but I thought the Supra would react the same way. You just can't have any air in the system with these cars either. Make sure your radiator cap is working right and allowing water from the purge tank to be sucked back in the system as it cools down. Let us know how it works out. Driving in this heat is a pain in the ass with an overheating car. Too hot to run the heater...lol. Russ