Remove/install cylinder head cover - AR01.20-P-5014MCU

ENGINE 132.910 in MODEL 451.3/4 

Fig 1: Identifying Cylinder Head Cover Remove/Install Components (1 Of 2)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Cylinder Head Cover Remove/Install Components (2 Of 2)

Courtesy of MERCEDES-BENZ USA

MODIFICATION NOTES

27.1.09

Remove/install clamp on vent hose for crankcase of cylinder head cover added

Step 2

	Remove/install
1	Remove ignition coils		AR15.12-P-2003MCU
2	Remove clamp (11) of crankcase vent hose (2) on cylinder head cover (1)	For vehicles, on which the clamp (11) is not yet installed, it must then be retrofitted during installation. : Replace clip (11). The clamp (11) must be fitted as close as possible to the cylinder head cover (1). Clamp pliers with side cutter
3	Detach crankcase vent hose (2) to the cylinder head cover (1)
4	Remove oil dipstick (3) from cylinder head cover (1)
5	Disconnect engine wiring harness (4) on engine		AR01.00-P-2420-01MCU
6	Detach vacuum hose (5) and supply line (7) on secondary air injection valve (6)
7	Remove complete exhaust system		AR49.10-P-7000MCU
8	Remove bolts for secondary air injection pipe (8) on cylinder head	The secondary air injection pipe (8) is attached to cylinder head by three bolts.	*BA14.30-P-1002-03C
9	Remove bolts (9) for secondary air injection valve (6) on cylinder head and remove together with secondary air injection pipe (8)
10	Remove bolts on cylinder head cover (1)	The cylinder head cover (1) is fastened with ten bolts. Loosen bolts for cylinder head cover (1) in reverse order of the tightening procedure. : Observe prescribed tightening sequence of bolts for the cylinder head cover (1).	AR01.20-P-5014-03MCC
			*BA01.20-P-1002-01I
11	Detach and remove cylinder head cover (1) from cylinder head	Check seal on cylinder head cover (1) for damage; replace cylinder head cover (1) if necessary. Remove sealant residue in the area of the joint edge of the cylinder head and timing case cover. : Check seals for spark plug shafts for damage, replace if necessary. Apply sealant in the area of the joint edge of the cylinder head and timing case cover. Sealing compound	*BR00.45-Z-1053-01A
12	Remove bracket (10) for engine wiring harness (4) on cylinder head cover (1)	When replacing the cylinder head cover (1).
13	Install in the reverse order
	Risk of accident  caused by vehicle starting off by itself when engine is running. Risk of injury  caused by contusions and burns during starting procedure or when working near the engine as it is running	Secure vehicle to prevent it from moving by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
14	Conduct engine test run and check engine for leaks in the area of the cylinder head cover (1)

CRANKCASE VENTILATION, CYLINDER HEAD COVER

Number	Designation		Engine 132.9
BA01.20-P-1002-01I	Bolt, cylinder head cover to cylinder head	Nm	10

COMBINATION VALVE

Number	Designation		Engine 132.910
BA14.30-P-1002-03C	Bolt, pipe for secondary air injection to cylinder head	Nm	8

REPAIR MATERIALS

Number	Designation	Order number
BR00.45-Z-1053-01A	Sealing compound	Q0000282V000000000