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Originally Posted by nahumm924
My 98 GP GT has a terrible squeal that sounds like a belt slip or a pully bearing going after the engine warms up. I found that if I remove the oil cap the noise goes away. When I put the cap back on, the noise comes back. Anyone had this problem before?
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How many miles are on your GT? When was the last time you checked or changed the PCV valve. Another person had a similar problem whereby they complained of noise around the Upper Intake Manifold (UIM). We don't know the outcome of his problem. When you remove the oil cap, it may be associated posititve crankcase ventilation. Just my 2 cents.