Withdrawal
Remove the oil pan to access the oil pump.
Remove the oil pump drive sprocket, unscrew the bolts securing the pump housing and the brackets securing the pump to the engine block bracket.
Remove the pump, if necessary, remove the oil pump drive chain tension adjusting plates installed between the pump bracket and the block.
Installation
Install a new oil seal between the pump housing and the block at the outlet of the main oil line.
Replace the pump drive chain tension adjusting plates, making sure the oil passage holes in the plates align with the main oil line holes in the engine block.
Fasten the pump mounting bracket so that there is no tension in the pump housing.
Make sure the pump drive chain is properly tensioned, which should flex slightly when pressed with your thumb. Pump drive chains can be of different lengths (see subsection «Detailed Specifications»).