Removal of the oil pump must be carried out in the following order.
Remove the upper part of the engine oil sump, unscrew the M10x1.0 nut (9) and remove the star (8) oil pump drive with chain (10) drive.
Loosen the bolt (2, fig. 4.98) and nuts (1) oil pump mounts and remove it.
Remove intake pipe (1, fig. 4.99) unfiltered oil and pressure pipe (2) filtered oil from the engine block.
Attention! The relief valve spring is highly compressed.
The design of the pressure reducing valve with a temperature-controlled piston is shown in Figure 4.100.
If necessary, remove the piston of the pressure reducing valve, for which, with a suitable rod, press on the sleeve (3, fig. 4.100) inside and remove the retaining ring (4).
The oil pump must be installed in the following order.
Attention! When carrying out further operations, exclude damage to the seal lips on the edges of the cylinder block housing.
Replace O-rings (12, 13, see fig. 4.13) round section on the intake pipe, lightly lubricate them with engine oil and insert the suction pipe into the cylinder block.
Replace o-ring (15, see fig. 4.13) round cross-section on the pressure pipe and lightly lubricate it with engine oil.
Insert the pressure pipe into the engine block in such a position that it can be fixed in the oil pump after the pump has been installed on the engine. Replace o-ring (arrow, fig. 4.101) oil pump.
Screw the threaded bushing into the oil pump housing as far as it will go (arrow, fig. 4.102).
Align the oil intake pipe and pressure pipe so that they match the corresponding holes in the oil pump. Push the oil pump onto the pipes.
Install and tighten the nut (7, see fig. 4.13) oil pump mounting torque 20 Nm (2.0 kgf·m).
Set asterisk (8) with chain (10) on the pump shaft and tighten the nut (9, M10) fastening of an asterisk of a drive of the oil pump the moment of 45 Nm (4.5 kgf·m).
Turning with socket wrench (arrow, fig. 4.103) threaded bushing in the pump, adjust the chain tension so that the maximum chain slack (A) was 2.0 mm.
Insert and tighten new self-locking bolt (6, see fig. 5.13, M8x45) oil pump mountings.