Overhaul
WM 172019 Removing and installing oil pump
Preliminary work
Preliminary work
1. Remove oil pan.
Information
Component overview
Overview
Information:
The oil pump must not be disassembled and reassembled!
When carrying out work on the oil circuit, it must be ensured that no dirt gets into the engine!
Information:
The oil pump can be replaced while installed.
Oil pump
1 - Rear intake pipe
2 - Fastening screw, M6 x 25
3 - Front intake pipe
4 - Fastening screw M6 x 25
5 - Pin
6 - Tensioning rail
7 - Mounting chain case cover
8 - Fastening screw M5 x 20
9 - Guide rail
10 - When reusing drive chain, mark running direction.
11 - Drive wheel on the drive chain, pay attention to the feather key
Removing oil pump
Removing oil pump
1. Unscrew chain tensioner of timing chain.
Unscrew the chain tensioner
2. Unscrew the 4 fastening screws M6 x 25 of the oil suction pipe on the lower section of the crankcase.
Oil suction pipe fastening screws on lower part of crankshaft housing
3. Unscrew oil return line from the oil pump.
Oil return line
4. Remove the oil pump timing chain cover. To do this, unscrew the 2 fastening screws M5 x 25.
Chain cover fastening screws
5. Release the 3 fastening screws M8 x 50.
Oil pump fastening screws
6. Tilt the oil pump forwards.
Oil pump
7. Push the tensioning rail for the oil pump drive aside with a finger. At the same time, raise the oil pump slightly and tilt forwards.
Oil pump drive tensioning rail
8. Take the oil pump drive chain off the oil pump sprocket and remove the oil pump.
9. Unscrew the oil suction snorkel from the oil pump.
Installing oil pump
Installing oil pump
Information:
In order to make it easier to install the oil suction pumps in the Cayenne Turbo (M48/50), it should be ensured that the driving slits on the chain sprocket are as horizontal as possible.
1. Position the oil pump slanting forwards on the lower section of the crankcase. At the same time, put the drive chain over the chain sprocket.
Oil pump
2. Tighten the 3 fastening screws. - Tightening torque: 17 ftlb.
Oil pump fastening screws
Notice:
Incorrect handling of drive chain
Tensioning rail tilted
- Drive chain must be tensioned.
3. Check that the tensioning rail is in the correct position. To do this, use a finger to push the tensioning rail away slightly from the chain. When doing this, the tensioning rail must be under pressure and holding the chain under tension.
Oil pump drive tensioning rail
4. Mount the plastic cover of the chain sprocket. Tighten the two fastening screws. - Tightening torque: 4.2 ftlb.
Chain sprocket plastic cover fastening screws
5. Secure the oil return line. Tighten fastening screw. - Tightening torque: 7.5 ftlb.
Oil return line fastening screw
6. Attach the four fastening screws for the oil suction tube to the lower part of the crankshaft housing. - Tightening torque: 9.5 ftlb.
Oil suction pipe fastening screws on lower part of crankshaft housing
7. Fit tensioner for the timing chain.
Subsequent work
Subsequent work
1. Check that the timing chain has not jumped over. To do this, turn the engine by two turns at the crankshaft. Make sure you can turn the engine without any mechanical resistance. Otherwise, set the timing.
2. Reinsert the cleaned oil pan.