Renew

Oil Pump, Renew

- Remove the oil pan.




- Place a drain tray under the transfer housing. Remove the housing bolts and housing (1, 2 Fig. 1).




- Remove the pick-up pipes (3 Fig. 1), push back the lock tabs (1 Fig. 2) and remove the pump sprocket bolts (2 Fig. 2).

- Remove the oil pump drive sprocket (3 Fig. 2), tab washer (4 Fig. 2) and shims.

- Remove the oil pump securing bolts and remove the pump.




- Remove the pressure relief valve cap, spring, mandrel and valve (1-4 Fig. 3).

- Clean the mating face in the cylinder block, the relief valve assembly, sprocket and shims.

- Lubricate the relief valve assembly, assemble into new pump, tighten the cap.

- Fit the new oil pump to the engine and tighten the securing bolts.




- Move the drive chain as far rearward as possible, fit a shim pack of 0.015 in. thickness to the oil pump flange (3 Fig. 4), align the bolt holes, fit the drive sprocket and two securing bolts. Using a straight edge (2 Fig. 4), check the alignment of the oil pump drive sprocket (1 Fig. 4) and crankshaft sprocket (4 Fig. 4).

- Remove and refit the pump drive sprocket and adjust the value of shim thickness as required in order to align the sprockets.

- When the alignment is satisfactory, remove the pump sprocket. Fit the chain and shims to the sprocket, fit to the oil pump. Fit the tab washer and securing bolts. Tighten the bolts and lock over the tabs.

- Ensure that the tension of the oil pump drive chain is correct, see Service Data under Engine Specifications. Adjust by slackening the tensioner securing screws, tapping the tensioner inwards to increase the tension, and securing in position when the tension is correct.

- Fit new `O' rings to the oil pump pick-up pipes. Lubricate and refit the pipes to the pump.

- Fit and seat the transfer housing. Fit and tighten the securing bolts.

- Refit the oil pan.