Remove/install valves - AR05.30-P-3511AMG (ML63 AMG)

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ENGINE 156

Fig 1: Identifying Valves Components

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

	Remove/install
	Risk of death caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between columns of vehicle lift and position four support plates at vehicle lift support points specified by vehicle manufacturer.	AS00.00-Z-0010-01A
1	Remove cylinder head (1)	Model 164, 251	AR01.30-P-5800GZS
		Models 209, 211, 219	AR01.30-P-5800TMG
		Model 216, 221	AR01.20-P-5014SMG
2	Mount cylinder head (1) onto assembly device	Assembly device	Fig 6
3	Attach the assembly tool (7) for valves at the cylinder head (1) and position vertically on the valve disk (2)	Use parts 3, 4, 5, 7, 15, 19 from the valve assembly tool case.
		Valve assembly tools case	Fig 4
4	Remove hydraulic valve clearance compensation elements		AR05.00-P-2011AMG
		Suction
5	Depress the valve spring with the assembly tool (7) and remove the split valve spring retainer locks (4)	Magnetic finger	Fig 2
6	Remove upper valve disk (2) and lower valve disk (3)	Check upper valve disk (2) and lower valve disk (3) for burrs, replace if necessary. The intake valve has 2 valve springs.
		Magnetic pin	Fig 3
		Thrust piece	Fig 5
7	Use pliers to remove valve stem seal (5)	Installation: Fit protective sleeve for valve stem seal (5) onto valve stem. Lubricate valve stem seal (5) and press on with drift. Pull off protective sleeve for valve stem seal (5) again.
		Pliers	Fig 7
		Drift	Fig 8
8	Remove cylinder head (1) from assembly device
	Risk of explosion and poisoning caused by the melting down or improper handling of sodium-filled valves. Risk of injury caused by skin contact with sodium resulting in heat or chemical burns.	Do not open sodium-filled valves. Wear protective gloves and safety glasses when handling damaged valves.	AS05.30-Z-0001-01A
9	Remove valve (6)	Installation: Check surface of valve stems for roughness and formation of ridging (visual inspection or with a nail). Replace valves that have rough stem surfaces or burrs.
10	Inspect valve (6)	The intake and exhaust valves must not be worked otherwise there is the risk that the valve (6) may not be sealed correctly. If the dimensions are less than the specified tolerances, the valve must be replaced.	AR05.30-P-4201-01SLR
		BE05.30-P-1001-01E BE05.30-P-1002-01E BE05.30-P-1003-01E BE05.30-P-1004-01E *BE05.30-P-1005-01E
	Disposal of sodium-filled valves	Exhaust valves with sodium filling	OS05.30-P-0001-01A
11	Install in the reverse order

TEST VALUES FOR VALVES

Number	Designation			Engine 156
BE05.30-P-1001-01E	Valve disk dia. Ø	Exhaust	mm	33.35 (±0.1
BE05.30-P-1001-01E	Valve disk dia. Ø	Intake	mm	40 (±0.1)
BE05.30-P-1002-01E	Valve disk height	Exhaust when new	mm	1.75 (± 0.1)
BE05.30-P-1002-01E	Valve disk height	Intake when new mm	1.48	1.48 (± 0.1)
BE05.30-P-1003-01E	Valve seat angle (α)	Exhaust	∠°	45 (±15')
BE05.30-P-1003-01E	Valve seat angle (α)	Intake	∠°	45 (±15')
BE05.30-P-1004-01E	Valve stem dia. Ø	Exhaust	mm	5.97 (-0.015)
BE05.30-P-1004-01E	Valve stem dia. Ø	Intake	mm	5.98 (-0.015)
BE05.30-P-1005-01E	Valve length	Exhaust	mm	103.55 (±0.015)
BE05.30-P-1005-01E	Valve length	Intake	mm	106.67 (±0.2)