- remove the oil pan (see subsection 3.5);
Figure 122. Oil pump drive sprocket mounting bolt
- unscrew the bolt in the center of the sprocket, shown in the figure 122, and remove the sprocket together with the chain from the pump shaft;
Figure 123. Fastening the oil pump to the bottom of the crankcase (using a four-cylinder engine as an example)
Figure 124. Additional support bracket for mounting the oil pump on a five-cylinder engine
- loosen the oil pump mounting bolts and remove it. The pump is secured with three bolts: two on one side and one on the opposite side. In addition, the five-cylinder engine has a support bracket attached to the pump and the lower part of the crankcase block. Figures 123 and 124 show the pump in the installed position. To access the pump on a five-cylinder engine, you also need to remove the intake manifold support;
- if necessary, unscrew the plug of the oil pump pressure relief valve. It is under pressure, so you should hold it before turning it all the way out. Remove the valve parts from the inner hole and check them carefully;
Figure 125. Oil pump of both types of engines: 1 - guide bushing; 2 - oil pump for a four-cylinder engine; 3 - spring washer; 4 — bolt, 25 Nm; 5 - support bracket (five-cylinder engine); 6 - washer; 7 — bolt, 10 Nm; 8 - washer; 9 — bolt, 25 Nm; 10 - oil pump of a five-cylinder engine; 11 — oil pump drive sprocket; 12 - washer; 13 - drive chain; 14 — bolt, 25 Nm
Figure 126. Installing the oil pump pulley on the shaft
- the installation of the oil pump is carried out in the reverse order. Figure 125 shows how the pump is mounted on both types of engines. Tighten the mounting bolts to a torque of 25 Nm. Place the pump drive sprocket on the shaft so that the corresponding places match (figure 126).
Oil pump repair
The oil pump cannot be repaired. If the reason for removing the pump was a loss of oil pressure, the oil pump should be replaced. When replacing, carefully check the chain and drive sprocket to avoid installing a new pump with worn drive parts.