Installation

1. Lubricate and install pressure relief valve and spring in bore of oil pump cover. Install cap and gasket. Torque cap to 35 ft. lbs. (48 Nm) with a reliable torque wrench. Do not over tighten.

Fig. 14 Checking oil pump gear and cover clearance:

2. Install oil pump gears and shaft in oil pump body section of timing chain cover to check gear end clearance and side clearance.
a. Check oil pump end clearance by placing a straight edge over the gears and measure the clearance between the straight edge and the gasket surface. Clearance should be between .002" and .006". If clearance is less than .002" measure gears and pocket to determine which is out of specification.

Oil Pump Clearance Check:

Oil Pump Teeth Measurement:

Oil Pump Clearance:

b. Check oil pump side clearance. Clearance should be between .002" - .005". If clearance is greater than .0050", measure gears and pocket to determine which is out of specification.
c. Check oil pump cover flatness by placing a straight edge across the cover face, using a feeler gage between straight edge and pump cover. If clearance is .001" or more, the pump cover must be replaced.
3. If gear end clearance and oil pump cover is flat and side clearance is satisfactory, remove gears and pack gear pocket full of petroleum jelly. Do not use chassis lube.
4. Reinstall gears so petroleum jelly is forced into every cavity of the gear pocket and between the teeth of the gears. Place new gasket in position.
NOTICE: This step is very important as the oil pump may "lose its prime" whenever the pump, pump cover or timing chain cover is disturbed. If the pump is not packed, it may not begin to pump oil as soon as the engine is started and engine damage may result.
5. Install cover assembly screws. Tighten alternately and evenly. The torque specification is 10 ft. lbs. (14 Nm).
6. Install filter on nipple.