Question about 1998 Chevrolet C1500

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Losing water Ok I am losing water form my radiator and resivor tank. The obvious places i have checked (i.e. water pump, thermostat housing, hoses and no obvious leaks and there is no water in the oil (thank God). I am noticing the more than usual ammounts water comming from the exhaust. The vehicle is a 1998 Chevy Silvarado 1500 with a 5.7 (350) with about 148,000 miles. It does not run hot when the water is at normal levels. and tough i dont really drive it alot of miles per week about 150 or so it will take about 2.5 to 3 weeks to lose about a gallon of coolant. What is going on any help out there?

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  • jepenny616 Apr 15, 2009

    Would there not be water in the oil? or running hot?

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Probably is a leak in the head gasket between the water jacket and the cylinder or possibly a cracked head. Either way, it's not cheap even if you are fixing it yourself. Rick

Posted on Apr 15, 2009

  • Rick Reichlein Apr 15, 2009

    Not necessarily. It depends on where the leak is, not all leaks go into the oil - some in combustion & out to exhaust manifold. And won't necessarily overheat. Lots of cars have this problem with the aluminum heads & iron block when they get old

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