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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 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.
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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.
Page 364 of 2053
M161 ENGINE MECHANICAL 1B2 -- 71
D AEW OO M Y_2000
Sectional View
1 Screw Plug
2 Ball (Nonreturn Valve)
3 Compression Spring
4 Ball Guide
5 Seal (Aluminum)
6 Filler Pin
7 Compression Spring
8 Snap Ring
9 Thrust Pin
10 Ball (Nonreturn Valve)
11 Compression Spring
12 Thrust Piece13 Chain Tensioner Housing
14 Seal
15 Timing Gear Case Cover
16 Cylinder Head
17 Bolt / Washer
18 Tensioning Rail
19 Cylinder Head Gasket
20 Timing Chain
21 Tensioning Rail Base (Sliding Surface)
A Oil Supply Hole
B Chain Tensioner Oil Storage Hole
Page 374 of 2053
M161 ENGINE MECHANICAL 1B2 -- 81
D AEW OO M Y_2000
CRANKSHAFT SPROCKET
Preceding Work: Removal of oil pan
Removal of tensioning rail
Removal of crank case guide rail
1 Oil Pump Chain Tensioner
2 Oil Pump Chain Bushing
3 Oil Pump Chain Spring
4 Crankshaft Sprocket
5Key6 Bolt (M8 x 20, 1 piece) / Washer
29-- 35 NSm (21-- 26 lb-ft) ...................
7 Oil Pump Sprocket
8OilPump
9 Oil Pump Roller Chain
10 Timing Chain
Page 375 of 2053

1B2 -- 82 M161 ENGINE MECHANICAL
D AEW OO M Y_2000
Tools Required
615 589 01 33 00 Crankshaft Sprocket Puller
Removal & Installation Procedure
1. Put the assembly mark at the crankshaft sprocket (4)
and the timing chain (10) with the paint (arrow).
Installation Notice
Align the assembly marks on crankshaft sprocket and
timing chain. Also, align the assembly marks on cam-
shaft sprocket and timing chain when installing.
2. Unscrew the bolt (6) and remove the oil pump sprock-
et (7) from the oil pump.
Installation Notice
Tightening Torque
29 -- 35 NSm (21 -- 26 lb-ft)
3. Remove the oil pump roller chain (9).
4. Remove the oil pump chain tensioner (1), oil pump
chain bushing (3), and the oil pump chain spring (2).
5. Remove the crankshaft sprocket (4) using crankshaft
sprocketpuller615589013300.
Notice:
DMake sure not to lose the crankshaft pulley key (5)
when removing.
DInstall the crankshaft sprocket (4) after warming it up.
6. Installation should follow the removal procedure in
the reverse order.
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M161 ENGINE MECHANICAL 1B2 -- 83
D AEW OO M Y_2000
PISTON
Preceding Work: Removal of engine
Removal of cylinder head
Removal of oil pan
Removal of oil pump
Removal of baffle plate
1 Connecting Rod Bearing Cap
2 Connecting Rod
3 Connecting Rod Bolt (M9 x 52, 8 pieces)
1ststep40NSm (30 lb-ft) ..................
2nd step 90°4Piston
5 Snap Ring
6 Piston Pin
Page 378 of 2053
M161 ENGINE MECHANICAL 1B2 -- 85
D AEW OO M Y_2000
1. Check the piston ring gap and apply the engine oil to
the piston pin and the connecting rod bushing.
2. Connect the piston and the connecting rod by press-
ing in the piston pin (6) and install the snap ring to the
groove.
3. Clean the cylinder bore, connecting rod bearing jour-
nal, connecting rod bearing shell and the piston and
coat them with engine oil.
4. Install the piston ring.
5. Install the piston so that the arrow on the piston head
faces to the forward of the vehicle.
6. After aligning the connecting rod and the bearing cap
mark (// or a number), tighten the bolts.
Installation Notice
TighteningTorque1st step: 40 NSm (30 lb-ft)TighteningTorque2nd step: 90°
Apply the engine oil to the bearing cap upper and low-
er bearing shells.
7. Check if the crankshaft rotates without any trouble by
rotating it.