Oil Pump: Service and Repair
WM 172019 Removing and installing oil pump
Tools
Technical values
Preliminary work
WARNING
Hot fluid
- Danger of scalding
-> Let the fluid cool down.
-> Wear personal protective gear.
1. Drain engine oil.
-> 170155 Changing engine oil and oil filter Removal and Replacement.
WARNING
Objects or loads falling down
- Risk of squashing or crushing
-> Secure components to prevent them from falling down.
2. Remove engine carrier.
-> 103219 Removing and installing engine carrier 103219 Removing and installing engine carrier.
3. Loosen compressor and lay it to one side.
-> 87341900 Removing and installing air conditioning compressor 87341900 Removing and installing air conditioning compressor.
4. Loosen holder for servo lines -2- on cylinder head 4-6.
4.1. Unscrew three external Torx screws (M6) -1-.
Holder for servo lines on cylinder head 4-6
5. Loosen flange -2- for positive crankcase ventilation line -1-.
5.1. Unscrew two external Torx screws (M6) -3- and place connection piece to one side.
Positive crankcase ventilation adapter
6. Remove screw adapter -2- for air conditioning compressor.
6.1. Unscrew two cheese head bolts (M8) -1- and remove connection piece.
Air conditioning compressor support
7. Remove coolant distributor housing.
-> 195919 Removing and installing coolant distributor housing Service and Repair.
8. Turn the engine clockwise at the crankshaft pulley to the TDC marking of cylinder 1/4 and detach pulley.
8.1. Check camshaft position (cylinder 4 overlap) at cylinders 4-6. Remove lid -arrows-.
-> 15050250 Checking camshaft timing - Engine installed 15050250 Checking camshaft timing - engine installed.
Lid
8.2. The adjusting gauge 9686 must fit into the camshaft slots.
Camshaft adjusting gauge
9. Remove the chain tensioner for side 4-6.
9.1. Replace sealing ring.
Removing oil pump
1. Remove oil pump.
1.1. Unscrew two fastening screws (M6 x 80) -1-.
On engines M97.20 and M97.21, the screw (M6 x 110) at the bottom left was removed when the engine carrier was removed.
1.2. Unscrew two countersunk screws (internal Torx, M6 x 20) -2-.
1.3. Unscrew one external Torx screw (M10 x 100) -3-.
1.4. Detach oil pump from crankcase. A careful twisting motion makes it easier to remove the pump.
1.5. Replace O-rings and moulded seals.
Oil pump threaded joint
Installing oil pump
Information
Always replace gaskets and O-rings.
- Grease all gaskets (except for the cooling system) with Kluber Syntheso Glep (Part No. 000.043.204.68).
1. Insert new seals on the oil pump housing and on the connection piece and lightly grease.
Information
- Make sure the driver for the intermediate shaft is positioned correctly.
2. Fit oil pump with new seals and O-rings.
2.1. Align driver for the intermediate shaft.
2.2. Insert oil pump. A careful twisting motion makes it easier to install the pump.
2.3. Fit oil pump with the fastening screws uniformly.
On engines M97.20 and M97.21, a countersunk screw (internal Torx, M6 x 110) is installed through the engine carrier instead of the fastening screw (M6 x 80, bottom left).
3. Tighten fastening screws.
3.1. Fastening screws M6 -1 and 2- :
=> Tightening torque: 10 Nm (7.5 ftlb.)
3.2. Fastening screw, M10 -3- :
=> Tightening torque: 46 Nm (34 ftlb.)
Oil pump threaded joint
Subsequent work
1. Fit chain tensioner with a new sealing ring.
=> Tightening torque: 80 Nm (59 ftlb.)
2. Fit new lids on cylinder head (do not use lubricants).
Lids
3. Pull fixing pin off crankshaft pulley.
4. Fit coolant distributor housing.
-> 195919 Removing and installing coolant distributor housing Service and Repair.
5. Fit air conditioning compressor support.
=> Tightening torque: 23 Nm (17 ftlb.)
6. Fit crankcase vent line connection piece.
6.1. Tighten two external Torx screws (M6).
=> Tightening torque: 10 Nm (7.5 ftlb.)
7. Secure holder for servo lines using three external Torx screws (M6).
=> Tightening torque: 10 Nm (7.5 ftlb.)
8. Fit air conditioning compressor.
-> 87341900 Removing and installing air conditioning compressor 87341900 Removing and installing air conditioning compressor.
9. Fit engine carrier.
-> 103219 Removing and installing engine carrier 103219 Removing and installing engine carrier.
10. Fill in engine oil.
-> 170155 Changing engine oil and oil filter Removal and Replacement.
11. Inspect engine for leaks.