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If the engine has been running without a leak and now it's started you probably have a bad water pump.

AnswerMost likely what you have is blown intake manifold gaskets allowing the leak.The engine will still run smoothly but is allowing water to leak and worst of all,allowing air into the cooling system.This is a problem because these particular engines will not self bleed the air out when you add more water to the radiator.this WILL cause the engine to overheat without warning and ruin an otherwise good engine.PARK the car until the gaskets are changed and cooling system properly bled.I recently changed three of these 3100 sfi engines out for customers due to this problem.
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โˆ™ 2011-09-13 17:53:42
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Q: What would cause an antifreeze leak around the timing chain cover of a 1996 Grand Am 3.1?
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