Oil Pump Assemble

Tools Required 

J 21882  Oil Suction Pipe Installer. See Special Tools and Equipment .

1. Apply clean engine oil GM P/N 12345610 (Canadian P/N 9931930) or equivalent, to the oil pump pressure relief valve, oil pump pressure relief valve spring, and oil pump body.
CAUTION: Refer to Safety Glasses Caution in Cautions and Notices.
IMPORTANT: Replace the oil pump pressure relief valve spring when you reuse the oil pump.
2. Install the following items:
   1. The oil pump pressure relief valve
   2. The oil pump pressure relief valve spring
   3. The oil pump pressure relief valve spring straight pin
Fig 1: View Of Oil Pump Pressure Relief Valve, Spring & Spring Straight Pin
Courtesy of GENERAL MOTORS CORP.
3. Apply clean engine oil GM P/N 12345610 (Canadian P/N 993193) or equivalent, to the oil pump drive gear, the oil pump driven gear, and the oil pump body internal surfaces.
4. Install the oil pump drive gear and the oil pump driven gear into the oil pump body.
   1. Align the matchmarks on the oil pump drive and driven gears.
   2. Install the smooth side of the oil pump drive and driven gears toward the oil pump cover.
Fig 2: View Of Oil Pump Drive Gear & Driven Gear
Courtesy of GENERAL MOTORS CORP.
5. Install the oil pump cover.
Fig 3: View Of Oil Pump Cover
Courtesy of GENERAL MOTORS CORP.
NOTE: Refer to Fastener Notice in Caution and Notices.
6. Install the oil pump cover bolts.

   Tighten:  Tighten the bolts to 12 N.m (106 lb in).

Fig 4: View Of Oil Pump Cover Bolts
Courtesy of GENERAL MOTORS CORP.
7. Inspect the oil pump for smoothness of operation by turning the oil pump driveshaft by hand.
8. Install the oil pump screen.
   1. If removed, replace the oil pump screen. The oil pump screen must have a good press fit into the oil pump body.
   2. Mount the oil pump in a soft jawed vise.
   3. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent, to the end of the oil pump screen pipe.
   4. Use the J 21882  and a soft-faced hammer in order to tap the oil pump screen into the pump body.

      The oil pump screen must align parallel with the bottom of the oil pan when the oil pan is installed.

Fig 5: Installing Oil Pump Screen Into Pump Body
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: Install a NEW oil pump driveshaft retainer during assembly.
9. Install the oil pump driveshaft and the NEW oil pump driveshaft retainer.
Fig 6: View Of Oil Pump Driveshaft & Oil Pump Driveshaft Retainer
Courtesy of GENERAL MOTORS CORP.