Oil Pan and Cylinder Block Base Plate
The cylinder block base plate (1) houses the oil pump, strainer and splash shields. The base plate is attached to the cylinder block by means of bolts. The bolt heads are protected by blanking covers.
The oil pan (2) is attached to the cylinder block base plate by means of bolts and is sealed with a special sealing compound. A drain plug is installed in the underside of the oil pan.
Oil Pump
The oil pump (1) is secured to the cylinder block by means of three bolts. One of these bolts also secures a splash shield. The oil pump is chain driven from the crankshaft and delivers oil to the cylinder block, where it is distributed via channels to all moving parts of the engine.
The oil pump is shown with the engine inverted and the cylinder block base plate removed from the cylinder block.
Oil Pump Strainer
The oil pump strainer (1) is attached to the underside of the cylinder block base plate by means of two bolts and locates with the oil pump body when the base plate is assembled to the cylinder block.
Splash Shields
The M9R engine is equipped with two splash shields. A splash shield (2) is located adjacent to the oil pump and is secured to the cylinder block by means of a bolt (1). This splash shield is shown with the engine inverted and the cylinder block base plate removed from the cylinder block.
Another splash shield is secured to the flywheel end of the base plate by means of a bolt (3).
Oil Filter and Cooler Assembly
The oil filter and cooler assembly is secured to the cylinder block by means of bolts and comprises:
- Oil filter housing (1)
- Plate type heat exchanger (3)
- Coolant inlet nozzle (5)
- Coolant outlet nozzle (4)
The heat exchanger is secured to the oil filter housing by means of screws. Engine coolant is circulated through the assembly by way of two coolant hoses that are secured by clamps to the nozzles. The nozzles are secured to the filter housing by means of bolts. A coolant system schematic can be found in “Functional Description: Coolant System” .
The oil pressure switch (2) is located in the oil filter housing.
To gain access to the oil filter assembly for maintenance, the engine and transmission undershield must first be removed.
Oil Level Sensor
The oil level sensor is located at the rear of the engine, right side, and is screwed into the cylinder block by means of an integral screw thread. The probe of the oil level sensor is immersed in the engine oil within the base plate, and sends a low level warning signal to the instrument cluster via a harness.
Dipstick and Dipstick Guide Tube
The dipstick guide tube is contained in a plastic housing that is secured to the cylinder block by a bolt (2). The dipstick is positioned in the guide tube by a bayonet cap fitting (1).
A nozzle (3) on the side of the guide tube housing is connected by a hose (5) to the oil filler assembly (4) that is attached to the air cleaner housing.
Oil Specification
The oil specification for M9R 780 is as follows:
| ACEA Oil Quality Classification | Viscosity |
|---|---|
| A5/B5 | 5W-30 |