Remove/install cylinder head cover · ar0120p5014tk · Mercedes-Benz WIS

AR01.20-P-5014TK

Remove/install cylinder head cover

09.08.2019

Engine	271.941 in model 211.042/242
Engine	271.956 in model 211.041/241

Modification notes

05.08.2019

AH05.20-P-1000-09SZ, added.

Operation step 8

1	Engine cover
2	Cylinder head cover
3	Front engine cover
4	Vent line
5	Bolts
6	Seal
Y32	Air pump switchover valve

P01.20-2069-06

 	Remove/install
1	Detach engine cover (1) upward off the cylinder head cover (2).	 Grasp with both hands and pry off. Check seal; replace if necessary.
		 Installation: When positioning the engine cover (1), ensure that the seal is seated correctly on the filler neck. The seal should not be pressed down by the engine cover (1), but must lie against the engine cover (1).
2	Unclip front engine cover (3).
3	Remove ignition coils.		AR15.12-P-2003T
4	Remove lower engine compartment paneling.		AR61.20-P-1105T
5	Disconnect the engine wiring harness to remove the cylinder head cover (2).		AR01.00-P-2410-02T
6	Detach bleed line (4) from the cylinder head cover (2).
7	Unclip air pump switchover valve (Y32) from the bracket.
8	Unscrew screws (5) and take off cylinder head cover (2).		AR01.20-P-5014-03Q
	General information on checking camshafts and bearing points of camshafts		AH05.20-P-1000-09SZ
		 Installation: Install new seals (6) and check that the seals (6) are seated correctly in the cylinder head cover (2). Observe tightening procedure for screw/bolts (5).
		 Screw/bolt, cylinder head cover to camshaft bearing housing	*BA01.20-P-1001-01H
		 Ignition coil to cylinder head cover	*BA15.12-P-1002-01F
9	Install in the reverse order.
 Warning	Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.	Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
10	Check for leaktightness when engine is running.

 Crankcase ventilation, cylinder head cover, camshaft bearing housing

Number	Designation		Engine 271
BA01.20-P-1001-01H	Screw/bolt, cylinder head cover to camshaft bearing housing	Nm	9

 Distributor ignition (DI [EZL]) system

Number	Designation		Engine 271
BA15.12-P-1002-01F	Ignition coil to cylinder head cover	Nm	8

Referenced documents

ah0520p100009sz General information on checking camshafts and bearing points of camshafts
ar0100p241002t Disconnect engine wiring harness
ar0120p501403q Bolt tightening procedure for cylinder head cover
ar1512p2003t Remove/install ignition coils
ar1512p2003t
ar6120p1105t Detach/attach lower engine compartment paneling
as0000z000501a Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.