Oil Pump Assemble

WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.

Tools Required

J 21882 Oil Suction Pipe Installer

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.
Install the following items:
1. 2.1. The oil pump pressure relief valve
2. 2.2. The oil pump pressure relief valve spring
3. 2.3. The oil pump pressure relief valve spring straight pin
  
  Fig 1: Installing Oil Pump Pressure Relief Valve, Spring, & Straight Pin
  Courtesy of GENERAL MOTORS CORP.
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.
Install the oil pump drive gear and the oil pump driven gear into the oil pump body.
1. 4.1. Align the matchmarks on the oil pump drive and driven gears
2. 4.2. Install the smooth side of the oil pump drive and driven gears toward the oil pump cover.
  
  Fig 2: Installing Oil Pump Drive Gear
  Courtesy of GENERAL MOTORS CORP.
Install the oil pump cover.

Fig 3: Installing Oil Pump Cover
Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to FASTENER NOTICE in Caution and Notices.
Install the oil pump cover bolts.
Tighten

Tighten the bolts to 12 N.m (106 lb in).
Inspect the oil pump for smoothness of operation by turning the oil pump driveshaft by hand.

Fig 4: Identifying Oil Pump Cover Bolts
Courtesy of GENERAL MOTORS CORP.
Install the oil pump screen.
1. 8.1. If removed, replace the oil pump screen. The oil pump screen must have a good press fit into the oil pump body.
2. 8.2. Mount the oil pump in a soft jawed vise.
3. 8.3. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent, to the end of the oil pump screen pipe.
4. 8.4. 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
  Courtesy of GENERAL MOTORS CORP.
Important: Install a NEW oil pump driveshaft retainer during assembly.
Install the oil pump driveshaft and the NEW oil pump driveshaft retainer.

Fig 6: Installing Oil Pump Driveshaft & Retainer
Courtesy of GENERAL MOTORS CORP.