Oil Pump: Service and Repair

REMOVAL PROCEDURE

^ Tools Required
- J 42038 Camshaft Holding Fixtures





1. Remove the engine front cover.
2. Remove the camshaft covers.

Important: You must install the J 42038 immediately after cam cover removal. The fixtures prevent unexpected camshaft rotation caused by valve spring pressure.

3. Install the camshaft holding fixture J 42038 onto the ends of the camshaft. Rotate the engine to align the camshafts with the tool using the hex in the camshaft and an open wrench.





4. When installed properly, the J 42038 will be fully seated on the camshaft ends with the camshaft flats parallel to the cam cover sealing surface.
5. Remove the oil pan.
6. Remove the oil pump pipe and screen.





7. Remove the camshaft drive chain tensioner (1) in order to remove the primary camshaft drive chain from the drive sprocket.





8. Remove the four oil pump assembly retaining bolts identified by the larger head size.
9. Slide the oil pump assembly off the nose of the crankshaft with the drive sprocket in place.





10. Remove the crankshaft sprocket from the oil pump assembly.
11. Wrap the oil pump in a towel for safe, clean storage until inspection or assembly is necessary.
12. If necessary, disassemble the oil pump.
13. If necessary, clean and inspect the oil pump.

INSTALLATION PROCEDURE





1. If necessary, assemble the oil pump.
2. Align the crankshaft sprocket splines with the oil pump gerotor and install the sprocket in the oil pump.





3. Place the pump and sprocket assembly in position by rotating the crankshaft sprocket until the machined slot (2) is indexed with the drive pin (1) in the crankshaft.





4. Slide the pump and sprocket onto the crankshaft until a positive stop is felt. Make sure the crankshaft sprocket is aligned with the drive pin in the crankshaft.
5. Install the oil pump pipe and screen.
6. Install the oil pan.





7. When properly installed, the crankshaft sprocket will protrude from the oil pump but the face of the sprocket will be located behind the machined step in the crankshaft as shown.
8. Align the pump body with the mounting holes in the cylinder block.
9. Install the oil pump retaining bolts.
^ Tighten the oil pump retaining bolts to 25 Nm (18 ft. lbs.).
10. Install the primary camshaft drive chain over the drive sprocket.





Important: Make sure correct primary and secondary camshaft drive chain timing are maintained.

11. Install the camshaft drive chain tensioner (1).





12. Remove the J 42038 from the cylinder heads.
13. Install the camshaft covers.
14. Install the engine front cover.