Remove/install chain tensioner · ar0510p7800a · Mercedes-Benz WIS

AR05.10-P-7800A

Remove/install chain tensioner

27.7.94

ENGINE 111

P05.10-0225-06

1 End piece

14 Chain tensioner housing

15 Sealing ring

25 Oil filler cap

26 Intake cam

P05.10-0226-06

1 End piece

2 Ball (return flow check valve)

3 Compression spring

4 Ball guide

5 Aluminum seal

7 Filler pin

8 Compression spring

9 Detent spring

10 Thrust pin

11 Ball (control valve)

12 Compression spring

13 Thrust piece (interference-fit)

14 Chain tensioner housing

15 Aluminum seal

16 Timing case cover

17 Cylinder head

18 Bolt+washer

19 Tensioning rail

20 Cylinder head gasket

21 Timing chain

22 Plastic shoulder (sliding surface) of tensioning rail

A Oil feed duct

B Oil reservoir for chain tensioner

	Remove
1	Remove top part of air filter		AR09.10-P-1050G
2.1	Remove compressor, install	Engine 111 with supercharger	AR09.50-P-4705A
3	Position piston of cylinder 1 to 20° after ignition TDC	Crank engine at crankshaft  At 20° after ignition TDC of cylinder 1, the timing chain cannot skip at the camshaft sprockets with the chain tensioner removed. To check whether cylinder 1 is positioned at 20° after ignition TDC, remove the oil filler cap (25). The tips of the intake cams (arrow) of cylinder 1 must point upwards at an angle.
4	Cover over alternator	e.g. with clean rag
5	Slacken end piece (1) one turn
6	Remove chain tensioner (14) complete	 If the complete chain tensioner is slackened, it must be removed, disassembled and reassembled as described.
	Install
7	Install chain tensioner (14)	 	AR05.10-P-7800-02A
8	Run engine and inspect for leaks

 Timing chain, chain tensioner

Number	Designation		Engine 111


BA05.10-P-1001-01B	End piece of chain tensioner	Nm	40
BA05.10-P-1002-01B	Chain tensioner housing in timing case cover	Nm	80

Commercially available tools

Number	Designation
WH58.30-Z-1035-06A	10 mm pin wrench socket, 1/2" square