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
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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
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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.
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1B2 -- 86 M161 ENGINE MECHANICAL
D AEW OO M Y_2000
CONNECTING ROD
Preceding Work: Removal of piston
1 Connecting Rod Bushing
2 Oil Gallery
3 Balance Weight
4 Connecting Rod Bearing Cap Bolt
(M9 x 52, 8 pieces)
1ststep40NSm (30 lb-ft) ..................
2nd step 90°5 Fit Sleeve
6 Upper Connecting Rod Bearing
7 Lower Connecting Rod Bearing
8 Bearing Shell Lug
9 Marking [Indication (//) or Numbers]
ServiceDataStandard
Distance (L) from The Connecting Rod Bearing to Bushing Bore CenterE20 : 154 mm
E23 : 149±0.05 mm
Width of The Connecting Rod (B) at Bearing Bore21.940 -- 22.000 mm
Width of The Connecting Rod (b) at Bushing Bore21.940 -- 22.000 mm
Basic Bore at The Bearing Shell (D1)51.600 -- 51.614 mm
Basic Bore at The Bushing (d1)24.500 -- 24.521 mm
Bushing Inner Diameter (d)22.007 -- 22.013 mm
Clearance Between The Piston Pin and The Bushing0.007 -- 0.018 mm
Peak -- to-- valley Height of Connecting Rod Bushing on Inside0.005 mm
Permissible Wwist of Connecting Rod Bearing Bore to Connecting Rod Bushing
Bore0.1/100 mm
Permissible Deviation of Axial Paralleism of Connecting Rod
Bearing Bore to Connecting Rod Bushing Bore0.045/100 mm
Permissible Deviation of Axial Paralleism of Connecting Rod Bearing Bore from
Concentricity0.01 mm
Permissible Difference of Each Connecting Rod in Weight0.4 g
Page 381 of 2053
1B2 -- 88 M161 ENGINE MECHANICAL
D AEW OO M Y_2000
PISTON RING
Preceding Work: Removal of piston
1 Piston Compression Ring (Top Ring)
2 Piston Compression Ring (2nd Ring)
3 Piston Oil Ring4--
5 Spacer
6SideRail
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M161 ENGINE MECHANICAL 1B2 -- 89
D AEW OO M Y_2000
Replacement Procedure
1. Measure the piston ring’s gap.
EdGfTh
Groove 1 0.20 -- 0.40 mm
End Gap of The
PistonRingGroove 2 0.20 -- 0.40 mmPistonRing
Groove 3 0.20 -- 0.45 mm
GapBetweenGroove 1 0.028 -- 0.060 mmGapBetween
ThePistonand
ThPitRi
Groove 2 0.010 -- 0.045 mm
The Piston RingGroove 3 0.010 -- 0.045 mm
Notice:If out of specification, replace the piston ring.
2. Remove the piston ring with a pliers.
3. For installation, position the piston ring to be the
‘TOP’ mark on the piston ring upward and arrange the
piston ring ends to be 120°apart.
4. Adjust the hook spring joint in the oil ring 180°away
from the ring end.
Page 383 of 2053
1B2 -- 90 M161 ENGINE MECHANICAL
D AEW OO M Y_2000
OIL PAN
1Bolt
2Bolt
3Bolt
4Bolt5Bolt
6OilPan
7 Gasket
Removal & Installation Procedure
1. Remove the drain plug and drain the oil completely.
2. Unscrew the bolts and remove the oil pan and gasket.
Notice:Arrange the bolts according to each size.
3. Clean the inside of oil pan and sealing surface, then
apply the sealant.
4. Replace the gasket with new one.
5. Install the oil pan with gasket, and tighten each bolt in
specified torque.
6. Check for oil leaks while running the engine.