Quote:
Originally Posted by Bdsiny
I'm defiantly not a mechanic . I did read up and heard that regular anti freeze won't cool it as much as purified water. Should the overflow tank be filled to the top?
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This is correct. Plain water with a surfactent like Water Wetter or Cool Ice will carry and transfer heat better than anti-freeze. If your car is overheating, adding anti-freeze will make it worse. That being said, you really need to run at least a 25% mixture.
Antifreeze contains lube for the water pump, and anti-corrosion additives. Plus, winter is coming, so.......
Reasons for overheating can be long and complicated. Try and break it down to a checklist, with the simple things first.
- Fan not working correctly. With the rear fan running, put your hand on the front of the radiator. Makes sure it's sucking air through the radiator core. If it overheats at speeds >45mph or so, the fan is usually not the issue. Unless it's running backwards.
- The two front fans are there for decoration. Ignore them.
- Replace the radiator cap.
- Incorrect ignition timing.
- Lean fuel mixture. Since you're having carb problems, this could be a big contributing factor.
- Incorrect cam timing. Much more difficult to check, and not usually a huge factor.
- The overflow bottle should be about 1/2 full with the engine cold.
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