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: Had problem of coolant leak not visable on my 1999 Pontiac Grand AM SE. Turned out that IT WAS the intake manifold gasket that was defective and the cause was the DEX-COOL (orange coolant) that was causing the problem. It chemically was attacking the material that was in the gasket causing it to breakdown prematurely. There is a class action law suit going on now against GM for this very reason. I had the intake manifold gasket replaced and also flushed out the (orange) DEX-COOL antifreeze and replaced it with the standard green antifreeze. After 7 years, I have had no problems. This is the link that you can access to veiw more information concerning this if you want to; : www.DexCoolSettlement.com.

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Q: 1999 pontaic grand am se where is coolant going evorpates no sing of where?
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