Tightening Procedure For Cylinder Head Bolts - AR01.30-P-5800-01MFC

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Engine 260

Topical note

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

AH00.00-P-0020-01A

CYLINDER HEAD

Number	Designation				Engine 260
BA01.30-P-1001-01Y	Bolt, cylinder head to crankcase	M11	Stage 1	Nm	10
			Stage 2	Nm	40
			Stage 3	∠°	90
			Stage 4	∠°	90
			Stage 5	∠°	90

CYLINDER HEAD

Number	Designation			Engine 260
BA01.30-P-1002-01Y	Bolt, cylinder head to timing case cover	M8	Nm	20

Fig 1: Identifying Tightening Angle With Magnet (450 589 00 13 00)

Courtesy of MERCEDES-BENZ USA

Cylinder head on the crankcase

Tighten screws (1 to 10) in numerical sequence to stage 1 .
Tighten screws (1 to 10) in numerical sequence to stage 2 .
Tighten screws (1 to 10) in numerical sequence with a tightening angle with magnet to stages 3 to 5 .
Follow the tightening sequence within the stages. Do not tighten the same screw in multiple stages right after one another.

Engine damage can occur otherwise.

Courtesy of MERCEDES-BENZ USA

Cylinder head on the timing case cover
Tighten bolts (11) .