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Crankshaft, removing and fitting

Crankshaft, removing and fitting

To remove



1. Remove the engine - see Engine, removing and fitting .

2. Fit the engine with adapter KM-412-3 onto assembly stand KM-412 or 83 94 751 Holder, engine and 83 96 376 Sleeve adapter kit x4 .

3. Remove the oil pump - see Oil pump, removing and fitting .

4. Block the flywheel and belt pulley respectively with KM-652 or 83 94 868 Flywheel locking attachment (1) and remove the crankshaft.

Caution

Note the order of the big-end bearing caps. Remove the big-end bearing cap from the connecting rod.

The fracture surfaces of the connecting rods and the big-end bearing caps form an individual fit and must not be interchanged or damaged. Do not rest the connecting rods or big-end bearing caps on their fracture surfaces to avoid damage.

5. Note the order of the crankshaft bearing caps. Remove the crankshaft bearing cap from the engine block.

6. Remove the crankshaft from the engine block.

7. Clean all parts.

8. Check the crankshaft - see Crankshaft end float, check , Crankshaft rotational deviation, check .

Note

When changing the crankshaft, its impulse sensor disc (1) must be transferred - tightening torque 15 Nm.


9. Moisten new bearing shells with engine oil and fit into the engine block and bearing cap. Fit the crankshaft carefully into the engine block. The crankshaft seat can be adjusted with light taps with a rubber hammer on the crank throws (2).



To fit


1. Apply a bead of adhesive sealing compound (black) in the groove on the rear crankshaft bearing cap. Fit the crankshaft and big-end bearing caps.


Note the markings and fitting position.

Tightening torque/angle tightening

Crankshaft bearing cap on engine block - 50 Nm + 45° + 15°

Note

Use new bolts. Press in adhesive sealing compound (black) once more from above until it comes out of the joints after fitting the rear crankshaft bearing cap.


Big-end bearing cap on connecting rod - tightening torque 25 Nm + 30°.

2. Fit the sealing ring for the rear crankshaft - see procedure Crankshaft rear sealing ring, change .

3. Block the flywheel and drive wheel respectively with KM-652 or 83 94 868 Flywheel locking attachment . Fit the flywheel on the crankshaft with new bolts - tightening torque 35 Nm + 30° + 15°. Fit the drive wheel onto the crankshaft with new bolts - tightening torque 60 Nm. Fit the oil pump - see Oil pump, removing and fitting . Remove the engine from the assembly stand KM-412 and adapter KM-412-3 from the engine. Fit the engine - see Engine, removing and fitting .