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Old 01-16-2005, 11:12 AM
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Uh excuse me but a 1997 Vortec does use a reverse rotation water pump...? The have done so since 87 or 88...

Just re-read your post (strokernova) and I think you are referring to the engine rotation (which is the same as always)...? I was talking about the water pump rotation...

Sly... If you look at the block where the water pump bolts on the passenger side holes their is a small hole just below the main hole for the water pump... This is the bypass I am referring to but on the Vortec block it is either not there or is blocked off in the casting... Look at an older block to see for sure and compare it to yours... Also notice the water pump that comes off the Vortec engine is different as it has a bypass line (that connects to the intake like a BBC) and also a heater hose line... But the bypass is a part of the main body of the waterpump...

I think I was possibly misunderstood on the bypass I was meaning...
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