Tightening Procedure For Crankshaft Bearing Caps - AR03.20-P-4351-02MR

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Engine 133, 139, 260, 270, 274, 282

Topical note

Notes on threaded connections fastened using a tightening angle-based tightening process

AH00.00-P-0020-01A

CRANKSHAFT BEARING CAP

Number	Designation			Engine 133	Engine 139
BA03.20-P-1001-01B	Bolt for crankshaft bearing cap	Stage 1	Nm	38	40
BA03.20-P-1001-01B	Bolt for crankshaft bearing cap	Stage 2	∠°	90	90

CRANKSHAFT BEARING CAP

Number	Designation			Engine 260	Engine 270
BA03.20-P-1001-01B	Bolt for crankshaft bearing cap	Stage 1	Nm	36	36
BA03.20-P-1001-01B	Bolt for crankshaft bearing cap	Stage 2	∠°	120	120

CRANKSHAFT BEARING CAP

Number	Designation			Engine 274
BA03.20-P-1001-01B	Bolt for crankshaft bearing cap	Stage 1	Nm	36
BA03.20-P-1001-01B	Bolt for crankshaft bearing cap	Stage 2	∠°	120

CRANKSHAFT

Number	Designation				Engine 282
BA03.20-P-1001-01P	Bolt, crankshaft bearing cap to crankcase	M14	Stage 1	Nm	32
BA03.20-P-1001-01P	Bolt, crankshaft bearing cap to crankcase	M14	Stage 2	∠°	63

Shown on engine 274 from below

Courtesy of MERCEDES-BENZ USA

Oil crankshaft bearing cap bolts on thread and bolt head contact surface.
Tighten crankshaft bearing cap bolts in the numerical sequence Engine 133, 139, 260, 270, 274
Engine 282

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Observe torque and tightening angle of the crankshaft bearing cap bolts.

If no angle tightener is available, continue turning crankshaft bearing cap bolts with a socket wrench and breaker bar in one move to specified angle. To exclude an angular error, do not use a bending rod torque wrench when tightening.