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Old 07-27-2012
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I am: David .
Join Date: May 2007
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coolant on top of overflow tank

Does anyone else ever find coolant all over the top of the tank after a long drive?

My 3.0 does this often. I'll clean it all up, then after the next long drive it'll happen again. I don't think the tank is overflowing, as the coolant level is normal when it is stopped. I tried revving the engine while watching the tank, and I did not see any bubbles come up. Not showing any other signs of a blown headgasket.

All I can think of is that the coolant may be sloshing around on bumps and the cap just doesn't seal well enough. It's not supposed to be airtight though, is it?
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Old 07-27-2012
I am: James D
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If its the same as the 4.0 and the overflow hose plugs in on the top in a bad spot it may be the overflow hose could have a crack or is just old enough the when heated it leaks out a little.

The cap should be tight and not allow fluid out of the tank unless the temperature can lift the spring. If in doubt replace the cap, it's cheap.
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Old 07-27-2012
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I am: Ryan
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Yup run down to NAPA and get a new cap. While you're there pick up some combustion gas test strips to test the coolant.
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