Page 693 of 2053
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.
Page 707 of 2053
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
Page 710 of 2053
OM600 ENGINE MECHANICAL 1B3 -- 161
D AEW OO M Y_2000
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).
Page 712 of 2053
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.
Page 715 of 2053
1B3 -- 166 OM600 ENGINE MECHANICAL
D AEW OO M Y_2000
Installation Procedure
1. Fit the piston onto the connecting rod so that the ar-
row (15) and the locking slot (16) are facing in direc-
tion 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 (ar-
row).
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.
Page 717 of 2053
1B3 -- 168 OM600 ENGINE MECHANICAL
D AEW OO M Y_2000
12. Coat the bolts (12) with oil and then tighten the bolts.
Tightening Torque40 N∙m (30 lb-ft) + 90_
13. Rotate the crankshaft and check axial clearance be-
tween the connecting rod and crankshaft.
14. Measure clearance between the piston crown and
cylinder
StandardMax. 0.12mm
15. Position the piston at TDC and measure the dis-
tance between the piston crown and the crankcase
surface.
StandardMax. 0.965 mm
Notice
Measure at points marked.
Dial Gauge 001 589 00 53 21
Dial Gauge Holder 363 589 02 21 00
Page 734 of 2053
OM600 ENGINE MECHANICAL 1B3 -- 185
D AEW OO M Y_2000
Removal & Installation Procedure
1. Remove the timing case cover.
2. By inserting a round bar (6) approx. 0.7m from the
back to the front side through the oil gallery, knock
out the steel balls (1,3).
Notice
Be careful not to damage the bores of the steel
balls.
6 Shop -- made tool
3. Thoroughly clean the bores of steel balls.
4. Place the steel ball (3) onto the drift (7) with a little
grease and position to the bore and then tap until the
drift stops.
Drift 601 589 08 15 00
5. Place the steel ball (1) onto the drift (7) with a little
grease and position to the bore and then tap until the
drift stops.
Drift 601 589 08 1500
6. Warm up the engine and check the oil for leaks.
Page 748 of 2053
OM600 ENGINE COOLING 1D3 -- 13
D AEW OO M Y_2000
Removal & Installation Procedure
1. Drain coolant from the radiator.
2. Remove the coolant thermoswich connector from
radiator.
3. Remove the each coolant hose.
4. Remove the auto T/M oil cooling hose and cooling
line.
Installation Notice
TighteningHose : 29-- 40N∙m (21-- 30 lb-ft)Tightening
TorqueTube : 25-- 35N∙m (18--26 lb-ft)
5. Loosen the radiator upper mounting bolt and re-
move the mounting stopper and insulator.
6. Remove the radiator.
7. Check the radiator pin for crack, leakage and bend-
ing and replace it if necessany.
8. Installation should follow the removal procedure in
the reverse order.