Tightening diagram of crankshaft bearing caps - AR03.20-P-4351-02SX

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CRANKSHAFT BEARING CAP

Number	Designation				Engine 273
BA03.20-P-1001-01D	Bolt for crankshaft bearing cap	M8	Stage 1	Nm	20
BA03.20-P-1001-01D	Bolt for crankshaft bearing cap	M8	Stage 2	° ∠	90
BA03.20-P-1002-01D	Side crankshaft bearing cap bolt	M8	Stage 1	Nm	20
BA03.20-P-1002-01D	Side crankshaft bearing cap bolt	M8	Stage 2	° ∠	90
BA03.20-P-1003-01D	Bolt for crankshaft bearing cap	M10	Stage 1	Nm	5
			Stage 2	Nm	30
			Stage 3	∠°	90

Lubricate bolts (1 to 30) of crankshaft bearing cap and the crankshaft fitted bearing cap on thread and bolt head contact surface.

Tighten bolts (1 to 30) in the numbering sequence.
Arrow identifies direction of travel.

If no torquing angle wrench is available at the final tightening stage, the bolts can be turned further using a socket wrench and locking handle all in a single operation. Do not use a flexirod torque wrench for tightening in order to avoid any angle errors.

To loosen the bolts (1 to 30), proceed in reverse order.

Fig 1: Tightening Sequence Of Crankshaft Head Contact Bolts
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.