Mechanics

CHEVROLET EXPRESS ENGINE PROBLEM

2005 Chevrolet Express • 173,000 miles

Need instructions to change the oil pump. Oil levels are fine and van is always well-maintained. However, clicking noise in engine (down near the oil pan) leads me to believe there's a problem with the oil pump. Need instructions on how to replace the oil pump.
Avatar
Guest
November 5, 2012.



Replacement
Fig. 183:  View Of Oil Pump Screen &  O Ring Seal Crankshaft Front Oil Seal
Courtesy of GENERAL MOTORS CORP. Replacement
Engine Front Cover Replacement
1. Remove the oil pan. Refer to Oil Pan Replacement. Crankshaft Rear Oil Seal
2. Remove the engine front cover. Refer to Engine Front Cover Replacement. Replacement
3. Remove the oil pump screen bolt and nuts. Engine Rear Cover Replacement
4. Remove the oil pump screen with O ring seal. Oil Filter Adapter Replacement
5. Remove the O ring seal from the pump screen. Oil Filter Bypass Valve
Replacement
6. Discard the O ring seal. Oil Pan Cover Replacement

Oil Pan Replacement
Fig. 184:  View Of Crankshaft Oil Deflector &  Nuts Engine Oil Pressure Sensor
Courtesy of GENERAL MOTORS CORP. And/or Switch Replacement
Engine Oil Level Sensor and/or
7. Remove the remaining crankshaft oil deflector nuts. Switch Replacement
8. Remove the crankshaft oil deflector. Oil Pump,  Pump Screen and
Deflector Replacement
Fig. 185:  View Of Oil Pump &  Bolt ? Removal Procedure
Courtesy of GENERAL MOTORS CORP. ? Installation Procedure
Timing Chain and Sprockets
IMPORTANT: Do not allow dirt or debris to enter the oil pump assembly,  cap end as necessary. Replacement
Camshaft Replacement

9. Remove the oil pump bolts. Engine Flywheel Replacement
10. Remove the oil pump. Engine Replacement
11. Clean and inspect the oil pump. Refer to Oil Pump Cleaning and Inspection . Engine Oil and Oil Filter


Hmac300
Nov 5, 2012.