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Re: Overheating

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Posted by rocnroll on June 13, 2005 at 09:18:32:

In Reply to: Posted by on June 12, 2005 at 20:22:07:

You can't fill it all the way to the top like a modern system UNLESS you put a catch can or reservoir (which is a good idea, unless you want to stay totally stock) because there HAS to be room in the radiator for expansion when the water heats up.....With the catch can setup, when the water heats up and expands, it will go out the overflow hose (the boiling over you experienced) and into the reservoir you have added. When the engine is shut down, the cooling action siphons the water (normally lost in a boilover) back out of the reservoir and into the radiator.

What it amounts to is just a bit more cooling capacity and no more antifreeze pumped out on the ground.

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