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How to replace water pump on 1999 oldsmobile silouhette

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Drain the coolant
ok you will see a pulley with NO GROVES with FOUR 10mm bolts
that's the water pump losen the 4 bolts then remove the drive belt
remove the 4 bolts prev. loosed and remove that pulley
then there are FIVE 8mm bolts holding the water pump to front cover
remove the 5 water pump bolts
then use a screwdriver and hammer and tap the pump to seperate the pump from the cover
clean the old gasket off
install the new water pump and gasket
reassemble the vehicle
refill the cooling system with coolant prev drained till a steady stream is coming out the AIR BLEED SCREW the close the bleed screw
if you need to add more coolant USE ONLY GM DEXCOL
then set your heater controls to VENT AND HOT
start the vehicle and let run till HOT AIR IS COMING OUT OF THE VENTS not WARM this will insure no air locks
hope this was help full

Posted on Dec 13, 2009


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