Lubrication circuit

OIL PUMP

REQUIRED TOOLS

• [1]. Subframe retaining bolt (ref. 169 589 00 62 00) (Fig.30).

REMOVAL

• Lower the subframe:

• remove the air filter housing,
• the throttle actuator (vehicles with particulate filter) or the air intake throttle (vehicles without particulate filter),
• remove the steering column universal joint bolt, then separate the joint (lock the steering wheel),
• support the radiator,
• remove the engine undertray,
• move the rear of the wheel arch liners aside,
• unhook the rubber exhaust mountings,
• remove the earth strap bolt from the oil sump,
• with manual gearbox, unclip the clutch hydraulic control pipe from the gearbox and the bulkhead,
• with xenon headlamps, disconnect the height sensor connector and remove its mountings,
• fit a support device under the subframe,
• remove the 4 subframe mounting bolts (1) (Fig.30),
• in place of the subframe mounting bolts, fit the retaining bolts with the stops [1],

Make sure the stops are centred on the retaining bolts.

• remove the 4 subframe mounting bolts (2),
• lower the subframe.

Before lowering the subframe, make sure no wiring harness, hose or pipe will obstruct its descent.

• Drain the engine oil.
• Remove:

• the auxiliary drive belt (see relevant operation),
• the compressor and secure it to the body (without opening the circuit),
• the alternator,
• the auxiliary drive belt tensioner bracket,
• the catalytic converter,
• the oil dipstick tube.

• Disconnect the oil level sensor (3) (Fig.31).
• Place a workshop jack under the engine and raise it to relieve the rear engine mounts.
• Remove the mounting bolt (4) of the engine mount.

Fig. 31

Fig. 30

Lubrication

1. 1
   Cylinder block
2. 2
   Piston underside oil jet
3. 3
   Oil deflector
4. 4
   Bolt (M6): 1.2 daN.m
5. 5
   Sealing gaskets
6. 6
   Oil sump
7. 7
   Bolt (M6):

• 1st stage: 0.6 daN.m
• 2nd stage: 1.3 daN.m.

1. 1
   Drain plug: 3 daN.m
2. 2
   Oil level, temperature and quality sensor: 0.5 daN.m
3. 3
   Oil dipstick guide tube
4. 4
   Oil dipstick
5. 5
   Oil pump
6. 6
   Bolt: 1.4 daN.m
7. 7
   Suction pipe
8. 8
   Oil pump drive chain
9. 9
   Oil pump cover.
10. 10
    Bolt (M6): 1.2 daN.m
11. 11
    Turbocharger
12. 12
    Turbo feed pipe
13. 13
    Banjo bolt: 1.5 daN.m
14. 14
    Turbo return pipe
15. 15
    Bolt (M6): 0.8 daN.m
16. 16
    Oil filter housing
17. 17
    Oil cooler pipe
18. 18
    Oil cooler
19. 19
    Oil filter cartridge
20. 20
    Oil filter cover: 2.5 daN.m
21. 21
    Oil filler tube
22. 22
    Oil filler cap
23. 23
    Oil separator.

• Remove the oil pan (fig.33).
• Remove the oil pump chain cover (fig.32).

Fig. 32

• Remove the bolts (6) from the oil pump (7), then disengage the pump from its chain and remove it.

INSTALLATION

Reinstall the previously removed components, observing the following points:

• replace all sealing gaskets and clean the mating surfaces,
• before reinstalling, fill the oil pump with engine oil,
• observe the oil pan tightening sequence (Fig.33),

Fig. 33

• replace the tightening bolts where required,
• fill with engine oil and check the level.

CHECKING THE OIL PRESSURE

REQUIRED TOOLS

• Pressure gauge.

CHECK

• Set the coolant expansion tank (1) aside without disconnecting the hoses.
• Remove the bolt (2) from the oil filter housing (3) (Fig.34).
• Connect the pressure gauge with its adapter in place of bolt (2).
• Bring the engine to its normal operating temperature.
• Check the oil pressure at 80°C:

• ≥ 0.8 bar at idle.
• ≥ 3 bar at 2,000 rpm.
• ≥ 4 bar at 4,000 rpm.

• Stop the engine.
• Disconnect the pressure gauge.
• Refit bolt (2).
• Check the engine oil level.
• Check for oil leaks.

Fig. 34