Page 337 of 2053
1B2 -- 44 M161 ENGINE MECHANICAL
D AEW OO M Y_2000
CRANKSHAFT REAR RADIAL SEAL
Preceding Work: Removal of flywheel or drive plate
1 Special Tool
2 Special Tool3 Crankshaft Rear Seal
Tools Required
601 589 03 43 00 Crankshaft Rear Seal Installer
Replacement Procedure
1. Remove the radial seal with a screw driver.
Notice:Use a clean cloth not to damage the radial seal
mounting hole and the crankshaft.
2. Install the special tool (2) to the crankshaft.
3. Apply the engine oil on the special tool (2).
Notice:Do not use the grease.
4. Install the radial seal on the inner parts assembler.
5. Press in the special tool (1) until the radial seal is
stopped.
6. Check for leaks while operating the engine.
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1B2 -- 48 M161 ENGINE MECHANICAL
D AEW OO M Y_2000
Removal & Installation Procedure
1. Unscrew the connecting rod bearing cap bolt and re-
move the bearing cap.
Installation Notice
Tightening Torque
40 NSm (30 lb-ft) + 90°
DMake sure that the upper and lower bearing shells
do not change each other.
DCoat the bearing shell with engine oil.
DInstall the bearing cap according to the consecu-
tive number.
Part No. : 601 030 00 62 2.15 mm
Part No. : 601 030 01 62 2.20 mm
Part No. : 601 030 02 62 2.25 mm
Part No. : 601 030 03 62 2.30 mm
Part No. : 601 030 04 62 2.40 mm
2. Unscrew the crankshaft bearing cap bolts and sepa-
rate the upper and lower bearing shells and thrust
washers.
Installation Notice
Tightening Torque
55 NSm (41 lb-ft) + 90°
DRemove the bearing cap from front (pulley side) to
rear.
DMake sure that the upper and lower bearing shells
do not change each other and coat with engine oil.
DThe oil grooves (arrows) in the thrust washers
must face outward and insert the thrust bearing
into the bearing cap.
DThere are five kinds of thrust washers by thick-
ness. Select the proper washer when repaired.
3. Remove the crankshaft.
4. Installation should follow the removal procedure in
the reverse order.
5. After completion of the installation, check for the ro-
tating condition of the crankshaft.
Installation Notice
DMake sure the crankshaft bearing cap properly
seated in place in the crankcase side. When perfectly
installed, the projected part (arrow) locates in the left
side (intake manifold side).
DAssemble so that the projected part of the cap and
crankcase face the same direction.
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1B2 -- 56 M161 ENGINE MECHANICAL
D AEW OO M Y_2000
7. Unscrew the bolt (3) from the armature (4) and re-
move the roll pin, and remove the armature.
Installation Notice
Tightening Torque
35 NSm (26 lb-ft)
8. Unscrew the nut (6) and remove the seal cover (7).
Installation Notice
Tightening Torque
60 -- 70 NSm (44 -- 52 lb-ft)
Notice:Put the locking slot of nut toward armarture.
9. Take off the timing chain from intake camshaft
sprocket.
10. Remove the adjuster piston (9) and conical spring
(10) from intake camshaft sprocket.
11. Unscrew the bolt (11) and remove the flange shaft.
Installation Notice
Ti
ghteningTo rque
1st step: 18 -- 22 NSm
(13 -- 16 lb-ft)
TighteningTorque
2nd step: 60°±5°
Notice:The flange bolt is designed to be used only
once, so always replace with new one.
12. Installation should follow the removal procedure in
the reverse order.
13. Check and adjust the camshaft timing.
Page 353 of 2053
1B2 -- 60 M161 ENGINE MECHANICAL
D AEW OO M Y_2000
7. Remove the bearing cap, and remove the intake
and the exhaust camshaft.
Installation Notice
Tightening Torque
22.5 -- 27.5 NSm
(16.6 -- 20.3 lb-ft)
Notice:Check the numbers on the bearing cap not to be
mixed up.
8. Apply the engine oil on the valve tappet and cam-
shaft bearing.
9. Installation should follow the removal procedure in
the reverse order.
Notice:
DBase circle of cam should cantact with the valve tap-
pet.
DInstall the camshaft bearing caps according to the
numbers on the cylinder head cast and bearing cap.
10. Check the camshaft timing position.
Page 355 of 2053

1B2 -- 62 M161 ENGINE MECHANICAL
D AEW OO M Y_2000
Tools Required
111 589 03 15 00 Holding Pin
Inspection Procedure
1. Position the NO.1 cylinder piston to ATDC 20°by
turning the crankshaft.
Notice:When the ATDC 20°mark on vibration damper
is aligned with timing gear case cover, the intake and ex-
haust cam of cylinderwill make the slope to the center
and will face up. In this way, the insert hole in NO.1 and
NO.4 camshaft bearing capwill match in line with the
flange hole for camshaft sprocket.
2. Check the timing as below procedure;
-- Check if the holding pin 111 589 03 15 00 can be
inserted into the NO.1 and NO.4 bearing cap hole.
-- At this condition, check if the ATDC 20°mark on
vibration damper aligns with the marker on the tim-
ing gear case.
Adjustment Procedure
1. Position the NO.1 cylinder to ATDC 20°.
2. Remove the chain tensioner.
3. Remove the exhaust camshaft sprocket.
4. Adjust the timing position with inserting the holding
pin 111 589 03 15 00 into the NO.1 and NO.4 cam-
shaft bearing cap hole and flange hole while rotating
the camshaft by using wrench.
5. Install the chain to the intake camshaft sprocket.
6. Install the chain to the exhaust camshaft sprocket
and tighten the bolt.
Installation Notice
Ti
ghteningTo rque
1st step: 18 -- 22 NSm
(13 -- 16 lb-ft)
TighteningTorque
2nd step: 60°±5°
The sprocket bolt is designed to be used only once,
so replace with new one.
7. Install the chain tensioner.
Installation Notice
Ti
ghteningScrew Plug40 NSm
(30 lb-ft)
Tightening
TorqueTensioner
Assembly72 -- 88 NSm
(53 -- 65 lb-ft)
8. Check the camshaft timing.
Page 358 of 2053
M161 ENGINE MECHANICAL 1B2 -- 65
D AEW OO M Y_2000
5. Install the engine lock 602 589 00 40 00 to the ring
gear to prevent the crankshaft from rotating.
6. Blow up with compressed air.
7. Install the supporting bar 111 589 01 59 00 (d) and
the lever pusher 111 589 18 61 00 (a).
8. Mount the thrust piece 111 589 25 63 00 (b) vertical-
ly to the valve spring retainer (2).
9. Press the valve spring (3) by using the lever pusher
111589186100(a).
10. Remove the valve cotter (1) using the pincette.
11. Remove the upper retainer (2) and the valve spring
(3).
12. Remove the valve stem seal (4) and replace if nec-
essary.
Notice:Check the valve stem seal for damage and re-
place if necessary.
13. Remove the lower retainer (5).
Notice:Check the retainer for damages and replace
with a new one if necessary.
14. Installation should follow the removal procedure in
the reverse order.
Page 360 of 2053
M161 ENGINE MECHANICAL 1B2 -- 67
D AEW OO M Y_2000
VALVE STEM SEAL
Preceding Work: Removal of valve spring
1 Drift 119 589 00 43 00
2 Valve Stem Seal3 Protective Sleeve
Tools Required
119 589 00 43 00 Drift
Replacement Procedure
1. Remove the valve stem seal (2) using the pliers.
Notice:Check the valve stem seal for damage and re-
place if necessary.
2. Coat the valve stem seal with oil and assemble it with
the protective sleeve.
3. Insert the valve stem seal by pressing it with the drift
119 589 00 43 00.
Page 361 of 2053
1B2 -- 68 M161 ENGINE MECHANICAL
D AEW OO M Y_2000
CHAIN TENSIONER
1 Screw Plug 40 NSm (30 lb-ft) ................
2 Seal
3 Filler Pin
4 Compression Spring
5 Snap Ring6 Thrust Pin
7 Chain Tensioner Housing
72-- 88 NSm (53-- 65 lb-ft) ....................
8Seal
Removal Procedure
1. Position the number 1 cylinder to ATDC 20°.
Notice:Remove the oil filler cap at adjustment position,
and check whether the intake camshaft cam’s lobe (ar-
row) stays in the upper side.
2. Cover the generator with a clean cloth.
3. Release the tension by unscrewing the screw plug
once.
Notice:In case that the tension is reduced by unscrew-
ing the screw plug, reinstall after completely removing
the chain tensioner. If the chain tensioner is tightened
again without completely reducing its tension, then the
snap ring doesn’t return to the original position and the
tension gets exceeded.