Sunday, April 8, 2012

How to Inspect and Replace Oil pump on Chevy Colorado and GMC Canyon?

The procedure for both GMC and Chevy Oil pump removal is same.

In this sections both the inspecting oil pump and replacing oil p[ump details are provided.
Its a complete step by step instructions with additional help diagrams.

Diagrams are provided to make the oil pump replacing procedure much easier.

Oil Pump INSPECTION, REMOVAL & INSTALLATION Details are as Follows:----

  1. Clean all parts of sludge, oil, and varnish by soaking in carburetor cleaner or cleaning solvent.
  2. Inspect for foreign material and determine the source of the foreign material.
  3. Inspect the oil pump housing and engine front cover for scoring, damaged threads, cracks or casting imperfections.
  4. Do not attempt to repair the oil pump housing. Replace the oil pump housing if damage is found.
  5. Inspect the oil pump gears for damage.
  6. Measure the inner oil pump gear tip clearance in several places.
  7. Measure the outer oil pump gear tip clearance in several places.
  8. Measure the oil pump gear side clearance.
  9. Inspect the pressure regulator valve for scoring, sticking or burrs.
  10. Inspect the pressure regulator valve spring for loss of tension or bending. Replace the pressure regulator spring if damaged.
  11. Inspect the oil pump pipe pickup tube and screen assembly for looseness, broken screen and o-ring damage.

Removal & Installation

  1. Before servicing the vehicle, refer to the Precautions Section.
  2. Remove or disconnect the following:

    Engine front cover
    Oil pump cover bolts
    Oil pump cover
  3. Matchmark the inner and outer gears in relation to the oil pump housing.
  4. Remove or disconnect the following: 

    Inner and outer oil pump gears
    Oil pump pressure relief valve plug
    Oil pump pressure relief valve and spring 

    Fig. Exploded view of the oil pump and related components-2.8L, 2.9L, 3.5L and 3.9L engines
To install:
  1. Install or connect the following:

    Oil pump pressure relief valve and spring
    Oil pump pressure relief valve plug and tighten to 124 inch lbs. (14 Nm)
    Oil pump outer and inner gears
    Oil pump cover and tighten the bolts to 89 inch lbs. (10 Nm).
    Engine front cover
  2. Start the engine and check for leaks.

These details will help.


Car repair guide?

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