Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN CARGO EXTENDED, 5.7 R, L31/KL8REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 330 (ENGINE MECHANICAL - 2.2L)REMOVAL AND INSTALLATIONUNIT REPAIR CLEANING, INSPECTION, AND SELECTIONOIL PUMP (UNIT REPAIR) DISASSEMBLY - L61TOOLS REQUIRED

2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8

Tools Required

2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8SECTION Tools Required

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

SA91101NE Feeler Gauge Set

Disassemble pressure relief valve.

Fig 1: Disassembling Pressure Relief Valve
Courtesy of GENERAL MOTORS CORP.
Remove gerotor cover and bolts.
Clean all parts in cleaning solvent. Remove varnish, sludge and dirt.

Fig 2: Removing Gerotor Cover And Bolts
Courtesy of GENERAL MOTORS CORP.
Inspect body clearance:
1. 4.1 Using a feeler gauge Service Tool SA 91101NE (or equivalent), measure the clearance between the driven rotor and pump body.
  Driven Rotor-to-Pump Body Side Clearance Standard: 0.150-0.277 mm (0.006-0.011 in.) Service Limit: 0.277 mm (0.011 in.) max.
2. 4.2 If the clearance is greater than maximum, replace the front cover assembly.
  
  Fig 3: Inspecting Body Clearance
  Courtesy of GENERAL MOTORS CORP.
Inspect tip clearance:
Using a Feeler Gauge Set SA91101NE (or equivalent), measure the clearance between both rotor tips.

Rotor Tip Clearance

Service Limit: 0.150 mm (0.006 in.) max.

Fig 4: Inspecting Tip Clearance
Courtesy of GENERAL MOTORS CORP.
Inspect end-to-end clearance: Using a Feeler Gauge Set SA91101NE (or equivalent) or Plastigage® (or equivalent) measure the clearance between the side of the gerotor assembly and the cover plate.