Remove/install valves - AR05.30-P-3511SXI

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ENGINE 642 in MODEL 207, 212, 218, 221, 222

Fig 1: Valves Remove/Install Components (1 Of 2)

Courtesy of MERCEDES-BENZ USA

Fig 2: Valves Remove/Install Components (2 Of 2)

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Remove cylinder head (1)	ENGINE 642 in MODEL 222	AR01.30-P-5800LFD
		ENGINE 642 in MODEL 207, 212, 218	AR01.30-P-5800OGE
		ENGINE 642 in MODEL 221	AR01.30-P-5800SXI
2	Detach exhaust manifold	ENGINE 642 in MODEL 222	AR14.10-P-3915LFD
		ENGINE 642 in MODEL 207, 212, 218	AR14.10-P-3915OGE
		ENGINE 642 in MODEL 221	AR14.10-P-3915SXI
3	Mount cylinder head (1) onto assembly device (01)	Before putting assembly device (01) into operation, check that counterholders (02) are correctly mounted on cylinder head (1). There is otherwise the danger that the cylinder head (1) will be pressed upwards out of the assembly device (01) and the cylinder head (1) will be damaged with the valves (6) in the combustion chamber. Observe operator's manual of assembly device manufacturer (01).
		Assembly tool	Figure
4	Mount assembly lever (03) with depressor (04) on sliding piece (05)	Position depressor (04) vertically at upper valve spring retainer (2) and align to sliding piece (05).
		Depressor	Figure
		Valve assembly tools kit	Figure
5	Slide air bellows for assembly device (01) with the lever (06)	Ensure that the air bellows for the assembly device (01) always correctly coincides with the combustion chamber and is pushed in the middle. The air bellows can otherwise be pushed out of the side of the combustion chamber and this leads to damage to the valves (6). Move the air bellows of the assembly device (01) with a lever (06) in such a way that the air bellows is aligned above the combustion chamber with the respective valves (6). Observe operator's manual of assembly device manufacturer (01).
6	Connect compressed air to assembly device (01) and open compressed air valve	The assembly device (01) air bellows presses the valve disks in the combustion chamber. Observe operator's manual of assembly device manufacturer (01).
7	Remove upper valve spring retainer (2) and valve spring (3)	Press valve spring (3) together. Remove valve keeper (4) with tweezers (07).
		Pliers	Figure
		Drift	Figure
		Replace valve stem seals before mounting the upper valve spring retainers (2) and valve springs (3): ↓ Replace valve stem seals	AR05.30-P-3500-02TI
8	Take out lower valve spring retainer (5)
9	Close compressed air valve for assembly device (01)	Then seal off the compressed air to the assembly device (01).
10	Remove valves (6)	For this purpose, detach the cylinder head (1) from the assembly device (01).
	Check
11	Check upper and lower valve spring retainers (2 and 5)	Check upper and lower valve spring retainers (2, 5) for score marks, cracks and pitting; replace if necessary.
12	Check valve stems	Check surface of valve stems for roughness and ridging (visual inspection or with nail). Replace valves (6) with a rough stem surface or ridging.
13	Install in the reverse order