Unscrew the oil drain plug and drain the oil from the engine. Send the drained oil for disposal. Disconnect the SS (1, Fig. 4.135) from the oil level sensor, unscrew the nuts (2) and remove the oil level sensor (3).
Clean the sealing surface on the oil pan. Replace the sealing gaskets - oil level sensor, oil filter cover and oil drain plug. Replace and tighten the oil filter cover to 33 N·m (3.3 kgf·m), tighten the oil drain plug (M12) to 25 N·m (2.5 kgf·m). Fill the engine with oil.
Install the stiffening plate and secure it in two steps – with a torque of 56 Nm (5.6 kgf·m) + 90°.