Page 619 of 2053
1B3 -- 70 OM600 ENGINE MECHANICAL
D AEW OO M Y_2000
15. Install the guide pulley (22) and fit the closing cover
(20).
Tightening Torque23 N∙m (17 lb-ft)
16. Replace the gasket (3) and install the cylinder head
cover (2).
Tightening Torque10 N∙m(89lb-in)
17. Install the cooling fan belt pulley and fan clutch.
18. Install the belt tensioning device and then install the
belt.
19. Install the cooling fan.
20. Fill the engine oil and check oil leaks by running the
engine.
Page 650 of 2053
OM600 ENGINE MECHANICAL 1B3 -- 101
D AEW OO M Y_2000
HYDRAULIC VALVE CLEARANCE COMPENSATION ELEMENT CHECK
1 Cylinder Head Cover
2 Bolt 10N∙m (89 lb-in) .....................
3 Gasket Replace..........................4 Valve Tappet
5 Cylinder Head
Page 656 of 2053
OM600 ENGINE MECHANICAL 1B3 -- 107
D AEW OO M Y_2000
Tools Required
102 589 03 40 00 Magnetic Bar
116 589 06 63 00 Magnetic Finger
601589015900AssemblingBoard
601 589 02 59 00 Supporting Bridge
667589003100PressLever
Removal & Installation Procedure
1. Remove the nuts (8) uniformly and then remove the
washer (7), exhaust manifold (9) and gasket.
Installation Notice
Check the stud bolt (6) for damage and replace if
necessary.
Tightening Torque12 N∙m (106 lb-in)
Replace the gasket and tighten the nuts (8).
Tightening Torque25 N∙m (18 lb-ft)
2. Install the assembling board (11) to the cylinder
head with 4 cylinder head blots (10).
Assembling Board 601 589 01 59 00
3. Pull out the valve tappet (1) with magnetic bar (12).
Notice
Place the valve tappets upside down (open end up-
ward).
Magnetic Bar 102 589 03 40 00
4. Install the supporting bridge (13) on the cylinder
head (5).
Supporting Bridge 601 589 02 59 00
Page 686 of 2053
OM600 ENGINE MECHANICAL 1B3 -- 137
D AEW OO M Y_2000
CAMSHAFT TIMING TEST
Preceding Work : Removal of glow plug
1 Cylinder Head Cover
2 Bolt 10N∙m (89 lb-in) .....................
3 Gasket Replace..........................4 Valve Tappet
5 Cylinder Head
Timing
CditifhftIntake valveExhaust valveCondition of camshaftOpenCloseOpenClose
NewAT DC 11 . 3 3_ABDC 17_BBDC 28_BTDC 15.25_
After approx. 20,000kmAT DC 1 2_ABDC 18_BBDC 27_BTDC 14_
* At 2mm of valve lifting stroke.
Page 687 of 2053

1B3 -- 138 OM600 ENGINE MECHANICAL
D AEW OO M Y_2000
Tools Required
001589532100 DialGauge
363 589 02 21 00 Dial Gauge Holder
366589002105 Extension
Measurement Procedure
1. Remove the cylinder head cover.
2. Rotate the engine in the direction of engine rotation
until the intake valve of NO.1 cylinder is completely
closed. The cam lobe faces up (arrow).
Notice
Do not rotate the engine at the bolt of the crankshaft
sprocket. Do not rotate the engine in the opposite di-
rection of engine rotation. If do, thiswill cause seri-
ous measuring errors.
3. Install the dial gauge holder and dial gauge (7) with
the extension (8) to the cylinder head and position
the tracer pin (9) onto the valve tappet (intake valve
of cylinder NO.1) with a preload of min. 3mm.
Notice
The tracer pin should be positioned exactly vertical.
Dial gauge Holder 363 589 02 21 00
Dial Gauge 001 589 53 21 00
Extension 366 589 00 21 05
4. Set the dial gauge to ’0’.
5. Rotate the engine further in direction of rotation until
the dial gauge has moved back by 2mm (valve lift) to
1mm.
6. Check the timing.
NewAT DC 11 . 3 3_
After approx. 20,000kmAT DC 1 2_
Notice
If timing is out standard, the camshaft should be
checked for wear and the timing chain for stretch. If
adifferenceofmorethan4_exists, the timing chain
should be replaced.
7. Replace the gasket and install the cylinder head
cover.
Tightening Torque10 N∙m(89lb-in)
Page 688 of 2053
OM600 ENGINE MECHANICAL 1B3 -- 139
D AEW OO M Y_2000
CAMSHAFT
Preceding Work : Removal of cylinder head cover
1 Bolt 25N∙m (18 lb-ft) ......................
2 Washer
3 Camshaft Bearing Cap
4 Camshaft
5 Dowel Pin
6 Locking Washer
7 Timing Chain8 Cylinder Head
9OilPan
10 Camshaft Sprocket
11 Was h er
12 12-- Sided Bolt (M11)
Check, 25N∙m (18 lb-ft)+90_ ...............
13 Gasket Replace..........................
14 Chain Tensioner 80N∙m (59 lb-ft) ............
Page 695 of 2053
1B3 -- 146 OM600 ENGINE MECHANICAL
D AEW OO M Y_2000
Notice
Always install the chain tensioner to be filled with oil.
Place the chain tensioner in engine oil up to over the
collar on the hexagon headwith the thrust pin facing
up. Slowly push down the thrust pin as far as the
stop 7~10 times with the aid of a press or a column
drill
Faulty chain tensioners should be replaced com-
pletely.
3 Screw Plug
4 Aluminum Gasket
5Ball
6 Ball Guide
7 Compression Spring
8 Compression Spring
9 Housing
10 Thrust Pin11 Valve Disc
12 O -- Ring
13 Snap Ring
14 Compression Spring
15 Filler
A Feed Bore from Cylinder Head
BToOilPan
Page 701 of 2053
1B3 -- 152 OM600 ENGINE MECHANICAL
D AEW OO M Y_2000
CYLINDER HEAD GUIDE RAIL
Preceding Work : Removal of the cooling fan
Removal of poly V-- belt
Removal of chain tensioner
1 Cylinder Head Cover
2 Bolt 10N∙m (89 lb-in) .....................
3 Gasket Replace..........................
4 Camshaft Sprocket
5 Washer
6 12-- Sided Bolt (M11)
Inspect, 25N∙m (18 lb-ft)+90_ ..............
7 Tensioning Lever
8 Bolt 23N∙m (17 lb-ft) ......................9 Bearing Pin Sealing Compound.............
10 Guide Rail
11 Bearing Pin
12 Guide Pulley
13 Socket Bolt 23N∙m (17 lb-ft) ................
14 Closing Cover
15 Spring
16 Timing Chain