Question about 1999 Ford Taurus
I have a 1999 Taurus SE 3.0L Vulcan Engine (12 Valve OHV). We have recently replaced the head gaskets, one cylinder head, intake manifold gaskets, exhaust maniford gaskets, water pump, thermostat, timing chain, timing cover gasket, front oil seal, and all other related gaskets. Saved one cyclinder head because it showed leakage of 20% in number 3 and passed warpage tests. Have not done any additional leak down tests or block chemical tests. Now the coolant level rises slowly from the bottom bar of the cold fill to roughly between the top bar of the cold fill and the black lid of the expansion tank when the engine is turned off. The cap whistles, but no steam escapes, and there are no bubbles in the coolant. Is this normal for cooling system operation and I don't know because I've just recently began checking the bottle after turning off the engine? Please help because I'm freaking out about it and want to know if I'm doing this unnecessarily. Thanks. Does it mean anything if the speed with which the coolant escapes the engine and enters the expansion tank varies? Sometimes it is a rapid release, other times it is very slow. Just want to make sure nothing is wrong with the car.
I had a similar problem with my 99 taurus. I had an expansion tube on the top of the plenum stopped up, the steel one. I took my garden hose and started testing to make sure water flowed through all of my system after i had put new heads and gaskets on mine. That tube probably was the original reason for my blowed head gasket, it got hot...I just took it off and ran a wire through it and blew it out with air hose then replaced it, maybe this is your problem.
Posted on Jun 09, 2009
Thanks for the help, miltonl999. Mine ended up being the radiator cap itself. I bought an after market expansion tank from Autozone, and a cap from a Ford Dealership. The Ford (Motorcraft) cap doesn't fit an aftermarket expansion tank. The orginal reason for the head gaskets on mine I think was the timing cover gasket cracking.
Posted on Jun 11, 2009
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Posted on Jan 02, 2017
Normal. This is called heat soak. When you stop the engine, its temperature rises since the coolant is no longer being circulated by the water pump through the radiator. The coolant then expands and goes higher in the overflow tank. As the engine cools, it retreats back into the engine. Proper level should be determined only when the engine is cool.
Posted on May 31, 2009
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