Removing and installing valve springs (cylinder head installed) · ar0530s3030a · Mercedes-Benz WIS

AR05.30-S-3030A

Removing and installing valve springs (cylinder head installed)

24.9.98

ENGINE 611.980 in MODEL 638.094 /194 /294
with CODE (MQ4) Engine OM611 DE22 LA (75 kW)
with CODE (MQ5) Engine OM611 DE22 LA (90 kW)

ENGINE 611.980 in MODEL 638.094 /194 with CODE (MQ3) Engine OM611 DE22 A (60 kW)

Removing and installing valve springs (cylinder head installed)

S05.30-2502-09

1 Exhaust camshaft

2 Inlet camshaft

3 Retaining lock

4 Camshaft housing

5 Connecting piece

6 Tensioning claw

7 Cylinder leak tester

15 Tweezers

16 Bottom valve spring retainer

R13 Glow plug 1

R14 Glow plug 2

R15 Glow plug 3

R16 Glow plug 4

8 Valve assembly tools case

9 Top valve spring retainer

10 Valve spring

11 Valve collets

12 Magnetic pin

13 Valve stem seals

14 Drift

 	Removing, installing
1	Remove glow plugs (R13, R14, R15, R16)		AR15.20-S-4111B
2	Remove camshafts (1, 2)		AR05.20-S-6992C
		 Installation: inspect basic position of camshafts, if necessary, after inspecting, 	AR05.20-S-6010C
		set basic position of camshafts	AR05.20-S-6020B
3	Remove camshaft housing (4)
4	Position piston of the cylinder to be processed to TDC	 Rotate engine at crankshaft; hold timing chain up for this step so that it does not jam. Do not crank engine back.	AR01.00-S-0120D
		 Pistons 1, 4 or 2, 3 are positioned to TDC
5	Install retaining lock (3) for crankshaft/starter ring gear	After positioning cylinder to be processed to TDC, to prevent crankshaft and piston being turned on	AR03.30-S-5000C
6	Seal injector hole	 The connector piece (5) is attached using the original tensioning claw (6)
			*611589006300
7	Connect cylinder leak tester (7)	 Calibrate tester. Remove check valve. Pressurize compression chamber of the cylinder to be processed to about 5 bar.	AR01.00-P-1300-01HB
			*611589016300
			*611589026300
			*WH58.30-Z-1015-05A
8	Attach valve assembly tool (8) to the cylinder head	 Use parts (3, 5, 7, 12, 19) from valve assembly tools case	*111589256100
		 Screw retaining fork (part 12) into thread at edge of cylinder head and position thrust piece (part 7) perpendicularly at top valve spring retainer (9)
9	Use assembly tool (8) to compress valve springs (10)
10	Remove valve collets (11)	 Removal: use tweezers (15) or magnetic pin (12)
		 Installation: ensure valve collets (11) are properly located
			*210589004000
			*WH58.30-Z-1040-02A
11	Remove top valve spring retainer (9) and valve springs (10)	 Valves must not strike the piston crown.  Inspect top valve spring retainer (9) for wear, replace if necessary.
12	Remove valve stem seals (13)	 Inspect valve stems for wear, replace if necessary
		 Installation: oil valve stem seals (18) and press on with drift (19)
			*606589003700
			*604589004300
13	Remove bottom valve spring retainer (16)	 Inspect bottom valve spring retainer (16) for pitting, replace if necessary
14	Install in the reverse order