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Posted on Dec 12, 2010
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We understand that your problem is: I have a 1990 g20 Chevy van it has been overheating, I replaced the thermostat and the heater control valve. When it is overheating the heat inside wont work but sometimes the heat will work and the van wont overheat until I stop and restart. Somehow I am loosing water when I drive even though I only drive less than a mile at a time because of not wanting to cause more damage. I put water and antifreeze in it before I drive. I noticed that there is water running down the tailpipe but i cant see where it is coming from. Any suggestions? I am a girl doing this mostly myself so any help is better than what I have now!.

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Get a mat and good light see where it runs from and get back to me maybe a hose maybe a freeze plug

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  • Posted on Dec 12, 2010
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Check to see if any of the freeze plugs show signs of leaking. Freeze plugs are the round circle things you will see running along both sides of the engine block below the intake and manifold. Freeze plugs are designed to pop out if the coolant in the engine freezes preventing damage to the engine block. Over time these can corrode and start leaking coolant from them.

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