Pontiac 8665237 PUMP,W/CO

Lubricate the pressure relief valve and spring before installing them in the bore of the oil pump case, then install the cap and gasket, torquing them to specifications. Insert the oil pump gear and shaft into the oil pump body section of the timing chain cover to check the gear end clearance and side clearance; use a straightedge over the gears to measure the clearance between it and the gasket surface, ensuring the end clearance is between 0.002-0.006 in. If it is less than 0.002, measure the gears and pocket to identify the out-of-specification component. For side clearance, it should be between 0.0025-0.0050 in., and if it exceeds 0.0050, measure the gears and pocket accordingly. Check the flatness of the oil pump cover face with a straightedge and feeler gauge, replacing the cover if the clearance is 0.001 in or more. If all clearances are satisfactory, remove the gears and pack the pocket with petroleum jelly, avoiding chassis lube. Re-install the gears, ensuring petroleum jelly fills every cavity of the gear pocket and between the teeth, as the pump may not prime without it. Install the pump cover assembly screws, tightening them alternately and evenly to specifications. Finally, install the oil filter and check the oil level with the dipstick, monitoring the oil pressure gauge or warning light during initial start-up and driving; if low oil pressure is indicated, shut off the engine and inspect all work.