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"THIS IS A STEEL REPLACEMENT PULLEY FOR THE LS1 MOTOR IN CAMARO SS, Z28, FIREBIRD FORMULA, TRANS AM WS6; WITH ORIGINAL FACTORY PLASTIC PART# 12559885.
THIS PULLEY WILL STOP THE NEED OF REPLACEMENT EVERY TIME THE PLASTIC BREAKS, OR COMES APART, AND RUINS THE PUMP RESERVOIR, AND LOSES THE BELT.
ALLOWS FOR EASY ACCESS TO THE PUMP BOLTS SO THE PULLEY DOES NOT HAVE TO BE REMOVED TO GET THE PUMP OFF!
GUARANTEED TO FIT 98-02 LS1 MOTORS AND REPLACE THE PLASTIC PART# 12559885.
EXACT OVERALL DIMENSIONS AS THE OEM PART.
OUTSIDE DIAMETER IS 6.6 INCHES AND 6.469in @ BELT GROOVE; BORE IS 0.7472 INCHES OR 18.9789mm TO FIT 19mm/.75in SHAFT SIZE (SAME OFFSET AS FACTORY PART)
SIMPLY PRESS ON UNTIL THE BELT DRIVE IS PERFECTLY ALIGNED
DOUBLE CHECK ALIGNMENT WITH BELT AND ACCESSORIES(ALTERNATOR, CRANK SHAFT, ETC.) FOR CORRECT PLACEMENT. There will be about 1/4'' of the bore not pressed on the shaft, because the factory part has a 1/4'' 'lip' inside it to make it 'stop' when it is aligned. These are made with no 'stop' inside."
I used that pulley on my LS swap. It's been fine, no issues.
I'm running truck spacing so it doesn't get pressed on the pump shaft all the way. I used permatex bearing retaining compound and it hasn't moved or slipped that i can tell. Many blasts to 6800rpm
Any PS pulley that is spoked is a huge improvement over the OEM solid pulley that blocks access to the pump bolts. Why remove the pulley just to be able to remove the pump bolts.
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