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 689 of 2053
1B3 -- 140 OM600 ENGINE MECHANICAL
D AEW OO M Y_2000
Tools Required
602 589 00 40 00 Engine Lock
Removal Procedure
1. Rotate the crankshaft and position the piston of no.1
cylinder at TDC.
Notice
Do not rotate the crankshaft in the opposite direction
of engine rotation.
In this position, the markings of the camshaft/cam-
shaft bearing cap (arrow) must be aligned.
2. Place alignment marks on the camshaft sprocket
and timing chain.
3. Remove the starter motor and install the engine
lock.
Engine Lock 602 589 00 40 00
Page 692 of 2053
OM600 ENGINE MECHANICAL 1B3 -- 143
D AEW OO M Y_2000
5. Tighten the camshaft bearing cap bolts acccording
to installation order.
Tightening Torque25 N∙m (18 lb-ft)
Notice
Tighten the No. 1 bolts (light arrow) by one revolu-
tion in stages first and then tighten the No.2 bolts
(dark arrow).
OM 662LA
OM 661LA
6. Install the camshaft sprocket to be aligned the mark-
ings of the camshaft / camshaft bearing cap (arrow).
Notice
Align the alignment marks on the timing chain and
sprocket.
7. Tighten the camshaft sprocket bolt.
Tightening Torque25 N∙m (18 lb-ft) + 90_
Page 696 of 2053
OM600 ENGINE MECHANICAL 1B3 -- 147
D AEW OO M Y_2000
TIMING CHAIN
Preceding Work : Removal of glow plug
Removal of chain tensioner
Removal of cooling fan
Removal of cylinder head cover
1 Chain Link
2 Timing Chain
3 Camshaft Sprocket
4 Outer Plate
Page 697 of 2053
1B3 -- 148 OM600 ENGINE MECHANICAL
D AEW OO M Y_2000
Tools Required
000589584300 ChainAssemblingDevice
Replacement Procedure
1. Cover over the chain box with cleaning rag and grind
off both chain pins (arrow) at a chain link (1) of the
timing chain.
2. Remove the outer plate (4) and chain link (1).
Notice
Ensure that the ends of the timing chain do not drop
into the chain box.
3. Loosen the chain tension with approx. 4 turns.
4. Connect the new timing chain (arrow) with chain link
(1)totheoldtimingchain(2).
5. By rotating the crankshaft in the of engine rotation,
pull out the old timing chain with installing the new
timing chain.
6. Remove the old timing chain and hold the ends of
the new timing chain to camshaft sprocket (3) with
wire (arrow).
Page 699 of 2053
1B3 -- 150 OM600 ENGINE MECHANICAL
D AEW OO M Y_2000
11. Place the fitting tool (8) onto the chain link and rivet
the chain pins one by one.
Tightening Torque35-- 40 N∙m (26-- 30 lb-ft)
12. Check the riveting of chain pins and re-- rivet if nec-
essary.
13. Remove the wire.
14. Position the no.1 cylinder at TDC.
In this position, the marking on camshaft / camshaft
bearing cap (arrow) must also be aligned. If the
markings are not aligned, the timing chain must be
re-- set and the injection pump timing has to be set.
Page 700 of 2053
OM600 ENGINE MECHANICAL 1B3 -- 151
D AEW OO M Y_2000
TENSIONING RAIL
Preceding Work : Removal of cylinder head
Removal of timing case cover
1 Tensioning Rail2 Bearing Pin
Notice
The plastic coating of the tensioning rail can not be
replaced.
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