Dennis, If anyone believes this you can boil your water before adding it or put negative pressure. Either way will remove the fresh oxygen. gary ---Date: Mon, 3 Nov 2003 18:39:36 -0500 From: Dennis Haynes <dhaynes@OPTONLINE.NET> Subject: Re: Coolant loss mystery One of the worst things for a cooling system is the regular topping off of coolant. Every time you add coolant, you are also adding water with freshly dissolved oxygen. Corrosion, here it comes. It is important for the system to be tight. The cooling system should not be opened or bleed with a warm engine. Water even with Antifreeze will vaporize as law as 140 or so. As soon as the system is opened, the vapor will make bleeding difficult as you now some steam. In addition, since the heads have areas that get hooter than the coolant, the loss of pressure will cause some "flashing" which will cause uneven cooling and possible head warping, seal damage. I have also found there is no benefit to raising the front. In fact it makes it harder for the water pump to push the coolant up hill. As for the perplexing tale, make sure the pressure cap is working properly and have a leak down test performed to make sure coolant is not leaking into the cylinders or combustion gasses pushing the coolant out while driving. Dennis
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