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Old 08-20-2007, 10:21 PM
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Re: blazer manifold gasket replace engine blown

If the coolant is not drained before removing the intake manifold, coolant WILL drain into the crankcase. It will destroy the oils ability to lubricate the engine. Flushing with heavy weight oil might be their way of saying they'll try to remove the coolant in the crankcase. The damage has already been done to the engine... if that is in fact what happened.
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