The trick it seems like when installing a new water pump on our Pontiacs is getting the right clearance between the pump and the plate between it and the timing cover. I think there was a thread about this a while ago, but it was determined by someone on this forum that too much clearance between that plate and the water pump impeller severely affected the cooling ability of the water pump. Or at least clearancing the plate (i.e. bending it just enough to maintain adequate clearance of a certain dimension around the impeller) improved cooling by quite a bit.
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06-08-2018, 11:22 PM
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