Service manual

Oil Pump Cleaning and Inspection
SIE-ID = 35473
Caution: Refer to Safety Glasses Caution in
Cautions and Notices.
1. Clean the oil pump components in cleaning
solvent.
2. Dry the components with compressed air.
3. Inspect the oil pump for the following conditions:
• Scoring on the top of the gears (1)
• Damaged gears (2) for the following:
− Chipping
− Galling
− Wear
• Scoring, damage or casting imperfections to
the body (3)
• Damaged or scored gear shaft (4)
• Damaged or scored gear shaft (5)
• Damaged bolt hole threads
• Worn oil pump driveshaft bore
• Damaged or sticking oil pump pressure
relief valve
Minor imperfections may be removed with a
fine oil stone.
• Collapsed or broken oil pump pressure relief
valve spring
4. If the oil pump is to be reused, install a NEW oil
pump pressure relief valve spring.
5. During oil pump installation, install a NEW oil
pump driveshaft retainer.
Oil Pump Assemble
SIE-ID = 389671
Tools Required
J 21882 Oil Suction Pipe Installer
1. Apply clean engine oil GM P/N United
States 12345610, GM P/N Canada 993193, 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:
2.1. The oil pump pressure relief valve
2.2. The oil pump pressure relief valve spring
2.3. The oil pump pressure relief valve
spring straight pin
186750
30401
Engine Engine Mechanical - 5.0L and 5.7L 6-87
2002 - Unit Repair (May 25, 2001)