Page 458 of 1463
1B3-156 OM600 ENGINE MECHANICAL
TIMING CASE COVER GUIDE RAIL
Preceding Work : Removal of cylinder head cover
1 Bearing Pin
2 Bearing Pin
3 Guide Rail
4 Oil Pump Chain5 Crankshaft
6 Spring
7 Bushing
8 Tensioning Lever
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OM600 ENGINE MECHANICAL 1B3-157
Removal Procedure
1. Pull out the tensioning lever (8) together with the spring (6)
and guide rail (3) far enough until the tensioning lever has
moved passed the oil pump chain (4) and is resting against
the crankshaft (5)
2. Pull the tensioning lever (8) off the bearing pin (2) and
carefully remove the spring (6). Remove the tensioning lever
(8) together with the spring (6) and bushing (7).
3. Remove the guide rail (3).
Installation Procedure
1. Install the guide rail (3). Attach the spring (6) to the guide
rail and to the tensioning lever (8).
Notice
Ensure that the spring is correctly located in the guide rail
(arrow).
2. Push the guide rail, spring, bushing and tensioning lever
together onto the bearing pin (1, 2).
Page 460 of 1463
1B3-158 OM600 ENGINE MECHANICAL
CRANKSHAFT SPROCKET
Preceding Work : Removal of oil pan
Removal of timing case cover
1 12-Sided Stretch Bolt (M11) .. Check, 25Nm + 90°
2 Washer
3 Camshaft Sprocket
4 Timing Chain
5 Bearing Pin
6 Bearing Pin
7 Oil Pump
8 Oil Pump Sprocket
9 Oil Pump Chain
10 Washer11 Bolt............................................................25Nm
12 Crankshaft Sprocket
13 Crankshaft
15 Key
16 Guide Rail
17 Spring
18 Bushing
19 Tensioning Lever
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OM600 ENGINE MECHANICAL 1B3-159
Special Tools
116 589 07 15 00 Drift
102 589 05 33 00 Puller
Removal Procedure
1. Pull out the tensioning lever (19) together with the spring
(17) and guide rail (16) far enough until the tensioning lever
has passed the oil pump chain (9) and is resting against
the crankshaft (13).
2. Pull out tensioning lever (19), spring (17) and bushing (18)
from the bearing pin (6).
3. Pull out the guide rail (16).
4. Remove the bolt(11) and then remove the washer (10), oil
pump chin (9) and sprocket (8).
Page 463 of 1463
OM600 ENGINE MECHANICAL 1B3-161
Installation Procedure
1. Put the same alignment mark on the new crankshaft
sprocket as in the old sprocket.
Notice
Check the timing chain, camshaft sprocket, injection pump
timing sprocket, oil pump chain and oil pump sprocket for
wear and replace if necessary.
2. Install the new crankshaft sprocket (12) by using a drift (21).
Notice
Align the groove of sprocket and woodruff key (arrow)
exactly.
Drift 116 589 07 15 00
3. Fit the timing chain (4) on the crankshaft sprocket (12).
Notice
Align the alignment marks (arrow) on the chain and sprocket.
4. Install the camshaft sprocket (3).
Tightening Torque 25 Nm + 90°
Notice
Pay attention on the alignment marks and dowel pin (arrow).
Page 464 of 1463
1B3-162 OM600 ENGINE MECHANICAL
Notice
If the max. length ‘L’ of the stretch bolt exceeds 53.6mm,
replace it.
5. Fit the oil pump chain (9) on the crankshaft sprocket (12)
and insert the oil pump sprocket (8) into the oil pump chain
and then install it on the oil pump.
Notice
The curved side of the oil pump sprocket should face the
oil pump.
6. Insert the woodruff key (15).
7. Install the guide rail (16). Attach the spring (17) to guide rail
and to tensioning lever together onto the bearing pins (5,6).
Notice
Ensure that the spring is correctly located in the guide rail
(arrow).
Page 465 of 1463
OM600 ENGINE MECHANICAL 1B3-163
PISTON
Preceding Work : Removal of the cylinder head
Removal of the oil pump
1 Oil Ring
2 2nd Ring
3 Top Ring
4 Snap Ring.............................................. Replace
5 Piston Pin
6 Piston
7 Connecting Rod Bushing.......................... Check8 Connecting Rod
9 Connecting Rod Upper Bearing Shell
10 Connecting Rod Lower Bearing Shell
11 Connecting Rod Bearing Cap
12 Connecting Rod Bolt.........................35Nm + 90°
13 Crankcase
14 Cylinder Bore
Notice
There are two kinds of connecting rods (for machining) and they are different in weight approx. 15g. When replacing
the connecting rod, measure its weight and ensure that a engine has the same weight of connecting rods. If not, there
would be a unbalancing of engine.
Page 468 of 1463
1B3-166 OM600 ENGINE MECHANICAL
Installation Procedure
1. Fit the piston onto the connecting rod so that the arrow
(15) and the locking slot (16) are facing in direction of the
vehicle.
2. Coat the piston pin (15) with engine oil and insert it by hand.
Notice
Do not heat up the piston.
3. Install the new snap ring (4) into the grooves (arrow).
4. Check the piston rings (1, 2, 3) and replace them if
necessary.
5. Install and arrange the piston rings to be evenly 120° from
each ends gap.