Crank Mechanism, Assembling

Crank mechanism, assembling

Cleaning

Caution! Make sure that the oil galleries are clean and free of foreign material.

Caution! Make sure that the component is free of foreign material and lubricant.

Ensure that the all components are completely clean. Blow clean the oil ducts in the block, intermediate section and oil pan.

Classification of main bearings
Wipe clean the bearing positions in the block and intermediate section. Check that the parts are clean and free from damages.
Check the classification of the block and crankshaft. Refer to: Engine, B6324S5 Engine





Install the main bearings in the cylinder block and the intermediate section. See the table.
E.g.: The marking on the block by bearing position 1 is "F", while the marking on the crankshaft at the corresponding bearing position is "M". This gives a red-marked bearing in the block and a yellow-marked one in the intermediate section.
The axial bearing is positioned at bearing recess 6.
Bearings with small grooves are placed in the engine block's bearing positions 1, 4, 7.
Bearings with complete grooves are placed in the engine block's bearing positions 2, 3, 5.
When reusing old bearing halves, make sure that they are positioned correctly with regards to crankshaft's rotational direction.






Caution! Make sure that the mating faces are clean and free of foreign material.

Use: Sealant, 1161771

Apply sealant on the engine block as shown.

Install the following items:
1. - 2.5mm ±0.5
2. - 1mm ±0.2
3. Make sure that no sealant is applied longer than the line shows.
Thoroughly lubricate all the bearing shells and the surface of the axial bearing.





Carefully position the crankshaft in the block.
The crankshaft may not be rotated before the intermediate part is torque-tightened.





Position the intermediate section.
Lubricate and install all the screws.





Torque: Intermediate section for engine block step 1 Stage 1: 5 Nm Stage 2: 30 Nm





Torque: Intermediate section for engine block step 2 , 5 Nm





Torque: Intermediate section for engine block step 3, 25 Nm











Torque: Intermediate section for engine block step 5 , 25 Nm

There is a classification letter stamped in for every cylinder. Refer to: Engine, B6324S5 Engine
The first letter corresponds to the classification of the cylinder diameter in cylinder 1 and is then followed by cyl. 2, 3, 4, 5, 6. Choice of piston is decided by the cylinder bore's classification. E.g.: Cylinder class D shall have piston marked D, etc.





Use piston ring pliers. Turn the piston rings so that the openings are offset as illustrated.
A = Compression ring. The text on the piston ring must be upwards.
B = Scraper ring. The bevel shall face down.
C = Oil ring. Three parts equilateral.
First install the expander ring (C), then the two other rings over the expander ring.
Ensure that the piston rings can be turned easily.
Incorrect positioning results in higher oil consumption.






Warning! Wear safety goggles.

The lock ring shoots away easily.
There is a marking on top of the piston. It shall face forward in the engine block. The connecting rods are symmetrical and can face either way. However, marked connecting rods shall face the same way.
Assemble connecting rod and piston with the piston pin. Check that the classification of each cylinder/piston diameter and any numbering of connecting rod match. Install both lock rings for the piston pin. Check that the lock rings are positioned correctly in the piston. The opening shall be in a vertical line.
Wipe clean at the bearing position in the connecting rod and cap, and blow with compressed air on the connecting rod's/cap's fracture surface.





999 5746 Holder 999 5746 Holder
The piston's arrow (top of piston) shall point forward and make sure that the classification matches. Use piston ring compressor. Lube the cylinder bores, pistons and bearings shells with oil. Turn the crankshaft so that the crank pin is at lower dead centre for the cylinder the piston is to be installed in. Make sure that the engine hangs so that the cylinder bores are as vertical as possible.
Carefully press/tap down the piston (e.g., with a hammer handle). When the piston has released the piston ring compressor, turn the engine 180° in the work stand. Tighten the connecting rod until it is fixed against the big-end bearing journal.





The crankshaft may not be rotated before the connecting rod's cap is tightened. Install the cap. Check that any marking matches. Lubricate the new screws with oil and install them. Tighten the screws according to the following sequence:

Check that the connecting rod can be moved sideways.





Torque: M6, 10 Nm


Install the following items:
- oil pump and line. Refer to: Oil pump, B6324S5 Service and Repair
- oil sump. Refer to: Oil pan, B6324S5 Service and Repair
- front crankshaft seal. Refer to: crankshaft front seal, B6324S5 Service and Repair
- rear crankshaft seal. Refer to: Crankshaft seal, rear, B6324S5 Service and Repair
- other parts. Refer to: Engine block, installing components, B6324S5 Engine Block, Installing Components