How to Inspect & replace Oil Pump on Buick Rendezvous?

The oil pump replacing procedure is as follows:----


Oil Pump
INSPECTION
REMOVAL & INSTALLATION Details for 3.4L engine,3.5L Engine & 3.6L Engine.

Inspection

1. Clean all parts of sludge, oil, and varnish by soaking in cleaning solvent.
2. Inspect for foreign material and determine the source of the foreign material.
3. Inspect the pump housing and cover for the following conditions:
   
   
   Cracks or casting imperfections

   Scoring

   Damaged threads
4. Do not attempt to repair the pump housing. Replace the pump housing.
5. Inspect the oil pump gears for the following conditions:
   
   
   Scoring

   Excessive wear
6. Inspect the idler shaft for looseness or scoring. If loose or damaged, replace the oil pump.
7. Inspect the drive gear shaft for looseness or scoring.
8. Inspect the pressure regulator valve for the following conditions:
   
   
   Scoring

   Sticking Burrs may be removed using a fine oil stone
9. Inspect the pressure regulator valve spring for the following conditions:
   
   
   Loss of tension

   Bending
10. Inspect the suction pipe and screen assembly for the following conditions:
    
    
    Looseness If the suction pipe is loose, bent or has been removed, replace the pump body cover and suction pipe.

    Broken wire mesh or screen
11. Measure the oil pump gear lash. Install the gears, and measure in several places.
12. Measure the oil pump housing gear pocket.
13. Measure the oil pump gears .
    
    NOTE

    When deciding pump serviceability based on end clearance, consider depth of the wear pattern in the pump cover.
14. Measure the oil pump gear side clearance.

Removal & Installation

3.4L & 3.5L Engines

1. Before servicing the vehicle, refer to the Precautions Section.
2. Drain the engine oil
3. Remove or disconnect the following:
   
   
   Negative battery cable

   Oil pan

   Bolt attaching the oil pump to the rear crankshaft bearing cap

   Oil pump and driveshaft

   Crankshaft oil deflector nuts and deflector, if necessary
4. Inspect the oil pump and oil pump driveshaft. 
   
   
   
   Fig. Exploded view of the oil pump mounting-3.4L and 3.5L Engines

To install:

1. Install or connect the following:
   
   NOTE

   Rotate the oil pump driveshaft as necessary for proper engagement with the oil pump drive.
   
   
   
   
   Crankshaft oil deflector, if removed. Torque the nuts to 18 ft. lbs. (25 Nm).
   
   
   
   
   Oil pump and driveshaft

   Oil pump to the rear crankshaft bearing cap. Torque the bolt to 30 ft. lbs. (41 Nm).

   Oil pan

   Negative battery cable
2. Fill the engine with oil.
3. Start the vehicle and inspect for leaks, repair if necessary.

3.6L Engine

1. Before servicing the vehicle, refer to the Precautions Section.
   
   WARNING

   Do not remove the left bank idler sprocket.
2. Remove the primary timing chain.
3. Remove the crankshaft sprocket.
4. Remove the oil pump bolts and the oil pump.
   
   
   

   

   Fig. Oil pump installation-3.6L engine

To install:

NOTE

There are no serviceable components within the oil pump. Disassemble the pump only to diagnose an oiling concern. A disassembled oil pump must not be reused. A disassembled oil pump must be replaced.

1. Align the oil pump gerotor with the crankshaft flats and install the oil pump to the engine block.
2. Align the pump body with the mounting holes in the cylinder block.
3. Install the oil pump bolts. Tighten the oil pump bolts to 17 ft. lbs. (23Nm).
4. Install the crankshaft sprocket.
5. Install the primary timing chain.

These details will help.

Thanks.

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Car repair guide?

http://technoanswers.blogspot.in/2012/03/car-repair-guide.html