Oil Pump: Service and Repair

Oil Pump





Removal

NOTICE: During engine repair procedures, cleanliness is extremely important. Any foreign material, including any material created while cleaning gasket surfaces, that enters the oil passages, coolant passages or the oil pan may cause engine failure.

NOTE: On early build engines, the timing chain rides on the inner side of the RH timing chain guide. Late build engines are equipped with a different design RH timing chain guide that requires the timing chain to ride on the outer side of the RH timing chain guide. For service, all replacement RH timing chain guides will be the late build design.

All vehicles

1. Remove the engine front cover. For additional information, refer to Engine Front Cover Service and Repair.

Engines equipped with early build RH timing chain guides

2. Rotate the crankshaft clockwise and align the timing marks on the Variable Camshaft Timing (VCT) assemblies as shown.





Engines equipped with late build/replacement RH timing chain guides

3. Rotate the crankshaft clockwise and align the timing marks on the VCT assemblies as shown.





All vehicles

4. NOTE: The Camshaft Holding Tool will hold the camshafts in the Top Dead Center (TDC) position.

Install the Camshaft Holding Tool onto the flats of the LH camshafts.





5. NOTE: The Camshaft Holding Tool will hold the camshafts in the TDC position.

Install the Camshaft Holding Tool onto the flats of the RH camshafts.





6. Remove the 3 bolts and the RH VCT housing.





7. Remove the 3 bolts and the LH VCT housing.





8. Remove the 2 bolts and the primary timing chain tensioner.





9. Remove the primary timing chain tensioner arm.





10. Remove the 2 bolts and the lower LH primary timing chain guide.





11. Remove the primary timing chain.





12. Remove the crankshaft timing chain sprocket.





13. Remove the 2 bolts and the oil pump screen and pickup tube.
- Discard the O-ring seal.





14. Remove the 3 bolts and the oil pump.





Installation

1. Install the oil pump and the 3 bolts.
- Tighten to 10 Nm (89 lb-in).





2. Using a new O-ring seal, install the oil pump screen and pickup tube and the 2 bolts.
- Tighten to 10 Nm (89 lb-in).





3. Install the crankshaft timing chain sprocket.





4. Install the primary timing chain with the colored links aligned with the timing marks on the VCT assemblies and the crankshaft sprocket.





5. Install the LH primary timing chain guide and the 2 bolts.
- Tighten to 10 Nm (89 lb-in).





6. Install the primary timing chain tensioner arm.





7. Reset the primary timing chain tensioner.
- Rotate the lever counterclockwise.

- Using a soft-jawed vise, compress the plunger.

- Align the hole in the lever with the hole in the tensioner housing.

- Install a suitable lockpin.





8. NOTE: It may be necessary to rotate the crankshaft slightly to remove slack from the timing chain and install the tensioner.

Install the primary tensioner and the 2 bolts.

- Tighten to 10 Nm (89 lb-in).

- Remove the lockpin.





9. As a post-check, verify correct alignment of all timing marks.





10. Inspect the VCT housing seals for damage and replace as necessary.





11. NOTICE: Make sure the dowels on the Variable Camshaft Timing (VCT) housing are fully engaged in the cylinder head prior to tightening the bolts. Failure to follow this process will result in severe engine damage.

Install the LH VCT housing and the 3 bolts.

- Tighten in the sequence shown to 10 Nm (89 lb-in).





12. NOTICE: Make sure the dowels on the Variable Camshaft Timing (VCT) housing are fully engaged in the cylinder head prior to tightening the bolts. Failure to follow this process will result in severe engine damage.

Install the RH VCT housing and the 3 bolts.

- Tighten in the sequence shown to 10 Nm (89 lb-in).





13. Install the engine front cover. For additional information, refer to Engine Front Cover Service and Repair.