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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)
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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) ............
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1B3 -- 142 OM600 ENGINE MECHANICAL
D AEW OO M Y_2000
7. Remove the camshaft bearing cap.
8. Pull off the camshaft.
Notice
Be careful not to miss front locking washer.
9. Pull out the locking washer.
Notice
Check the condition of locking washer and replace if
necessary.
Installation Procedure
1. Insert the locking washer.
2. Check the valve tappet and ensure that tappet
moves smoothly.
3. Coat the camshaft with oil and install the camshaft
onto the cylinder head so that the TDC marking (ar-
row) is positioned upward vertically.
4. Install the camshaft bearing caps according to
markings(1, 2, 3 etc.).
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1B3 -- 144 OM600 ENGINE MECHANICAL
D AEW OO M Y_2000
Notice
If max. length ’L’ of the 12-- sided bolt exceeds
53.6mm, replace it.
8. Install the chain tensioner.
Tightening Torque80 N∙m (59 lb-ft)
Notice
Replace the seal.
Before installation, by pumping in the oil approx. 10
times, fill the oil.
9. Remove the engine lock.
10. Check the TDC marking of OT on the crankshaft.
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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.
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1B3 -- 158 OM600 ENGINE MECHANICAL
D AEW OO M Y_2000
CRANKSHAFT SPROCKET
Preceding Work : Removal of oil pan
Removal of timing case cover
1 12-- Sided Stretch Bolt (M11)
Check, 25N∙m (18 lb-ft)+90_ ...............
2 Washer
3 Camshaft Sprocket
4 Timing Chain
5 Bearing Pin
6 Bearing Pin
7OilPump
8 Oil Pump Sprocket
9 Oil Pump Chain10 Washer
11 Bolt 25N∙m (18 lb-ft) ......................
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 -- 161
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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 (ar-
row) 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 Torque25 N∙m (18 lb-ft) + 90_
Notice
Pay attention on the alignment marks and dowel pin
(arrow).
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OM600 ENGINE MECHANICAL 1B3 -- 163
D AEW OO M Y_2000
PISTON
Preceding Work : Removal of cylinder head
Removal of the oil pump
1 Oil Ring
2 2nd Ring
3 Top Ring
4 Snap Ring Replace........................
5 Piston Pin
6Piston
7 Connecting Rod Bushing Check............8 Connecting Rod
9 Connecting Rod Upper Bearing Shell
10 Connecting Rod Lower Bearing Shell
11 Connecting Rod Bearing Cap
12 Connecting Rod Bolt 35N∙m (26 lb-ft)+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 replac-
ing 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.