Contents: Crankshaft and main bearings ⇩ Ladder frame and oil pan ⇩ Oil filter and oil cooler assembly ⇩
The main components of the crankshaft and oil pan are as follows:
- Crankshaft and main bearings
- Ladder frame and oil pan
- Oil filter and oil cooler assembly
Crankshaft and main bearings
| Pos. | Spare part number | Name |
| 1 | - | Crankshaft |
| 2 | - | Upper main bearing shell |
| 3 | - | Upper main bearing shell (No. 3 - thrust bearing) |
| 4 | - | Bearing cap |
| 5 | - | Lower main bearing shell |
The crankshaft is made of forged steel. The main and connecting rod journals are hardened by high-frequency quenching. The crankshaft is installed in 5 main bearings with a 2-layer housing.
The crankshaft drive pulley is fixed relative to the shaft not with a key, but only with one bolt.
The main bearing caps are doubled and secured with bolts installed in two planes. This helps to increase the strength and rigidity of the cylinder block.
The main bearings are selectively selected aluminum-tin split liners. An oil groove in the upper part of each bearing transfers oil to the crankshaft to lubricate the bearings of the upper connecting rod head. The upper and lower liners of the third bearing have built-in thrust washers that limit the axial play of the crankshaft.
The arrow on the bearing caps should point towards the front of the engine, the markings are as follows:
The text of the article was taken from the website [LRMAN.RU]
| Bearing cap | Identification |
| 1 | F(front) |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | R (rear) |
The front and rear crankshaft oil seals are pressed into holders.
Ladder frame and oil pan
| Pos. | Spare part number | Name |
| 1 | - | Oil pan |
| 2 | - | Staircase construction |
| 3 | - | Cylinder block |
An aluminum alloy ladder frame is mounted to the cylinder block to improve engine rigidity and reduce noise, vibration and harshness (NVH). The structure is made from high-pressure die-cast aluminum and includes an oil deflector to reduce foaming and oil splashing.
The side clearance between the ladder frame and the cylinder block should be adjusted using a special tool. The clearance at the rear is adjusted using a suitable ruler (for more information, please refer to the service station manual).
The ladder frame is secured to the cylinder block with 22 bolts. The stamped steel oil pan is secured to the ladder frame with 16 bolts. The oil pan drain plug is located on the rear wall of the pan, and the oil level/temperature sensor is located on the right side of the ladder frame, behind the turbocharger drain pipe.
The oil pump is bolted to the underside of the ladder frame at the front left side and is driven by a chain from the crankshaft sprocket (for more information, please refer to the section on lubrication system).
A reusable gasket is provided to seal the joint between the oil pan and the ladder structure; a sealant is used to seal the joint between the oil pan and the ladder structure.
Oil filter and oil cooler assembly
| Pos. | Spare part number | Name |
| 1 | - | Hose - coolant distribution manifold to oil radiator |
| 2 | - | Oil radiator |
| 3 | - | Oil pressure sensor |
| 4 | - | Oil filter |
| 5 | - | Base plate |
The oil filter and oil cooler assembly is secured to the left side of the ladder frame with 6 bolts. The oil pressure sensor passes through the base plate of the oil filter and oil cooler assembly to the ladder frame (for more information, please refer to the section on lubrication system).
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