Caps are the most common cooling system failure. Look closely, there s a small mushroom like disk (atmospheric valve) on the bottom center, it should be held closed by a very light spring. Its rubber should be in good condition, as should the rubber that seals against the neck flange. The tension spring that applies pressure is also a failure point in that it can rust or corrode away. The atmospheric valve is to allow the cooling system to draw in air as it cools off, this prevents collapsed hoses or components like top tanks. New caps are cheap. Jim
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Today's Featured Article - Talk of the Town: Repairin a Gas Tank - by Staff. This interesting discussion is from the Tool Talk Discussion Forum. Remember that safety is your first priority - make sure you know what you are doing before attempting a potentially dangerous activity!
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