Page 379 of 2053

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
Page 382 of 2053
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.
Page 384 of 2053
M161 ENGINE MECHANICAL 1B2 -- 91
D AEW OO M Y_2000
Oil Circulation
1 Oil Strainer
2OilPump
3OilPan
4 Oil Non-- Return Valve
5 Oil Filter
6 Oil Filter Bypass Valve
7 Main Oil Gallery
8 Closing Ball (φ15mm)
9 Crankshaft
10 Connecting Rod Bearing
11 Crankshaft Bearing
12 Connecting Rod
13 Piston
14 Oil Spray (Piston Crown Area)
15 Non-- Return Valve (Crankcase)16 Oil Supply (To Chain Tensioner)
17 Camshaft
18 Cam Bearing
19 Valve
20 Oil Gallery (Supply Oil to Intake Tappet)
21 Oil Gallery (Supply Oil to Exhaust Tappet)
22 Ball (φ8mm)
23 Camshaft Plug
24 Seal
25 Screw Plug
26 Oil Return Gallery
(Cylinder Head and Crankcase)
27 Oil Return Gallery (Crankcase)
28 End Cover (φ20mm)
29 Oil Return Pipe
Page 385 of 2053
M161 ENGINE MECHANICAL 1B2 -- 97
D AEW OO M Y_2000
OIL PRESSURE RELIEF VALVE
Preceding Work: Removal of oil pan
1 Screw Plug 50 NSm (37 lb-ft) ................
2 Compression Spring3 Guide Pin
4Piston
Removal & Installation Procedure
1. Remove the screw plug (1).
Installation Notice
Tightening Torque
50 NSm (37 lb-ft)
2. Remove the spring (2), guide pin (3) and the piston
(4).
3. Installation should follow the removal procedure in
the reverse order.
Notice:Don’t use the seal for the screw plug.
Page 386 of 2053
1B2 -- 98 M161 ENGINE MECHANICAL
D AEW OO M Y_2000
OIL NON-- RETURN VALVE
Preceding Work: Removal of timing gear case cover
1 Oil Non-- return Valve
Functions
The non -- return valve prevents the oil in the chain ten-
sioner from drying up. In other words, it stops oil-- return-
ing in order to prevent the oil in the chain tensioner from
getting dry. As a result, the chain tensioner can be acti-
vated with oil in itself.
Replacement Procedure
1. Remove the non--return valve using a pliers.
2. Insert new non-- return valve with hand.
Page 387 of 2053
M161 ENGINE MECHANICAL 1B2 -- 99
D AEW OO M Y_2000
OIL DIPSTICK GUIDE TUBE
1 Oil Dipstick Level Gauge
2 Oil Dipstick Guide Tube
3O--ring4 Bolt (M6 X 16, 1 piece)
9--11 NSm (80-- 97 lb-in) ....................
5 Clamp
Removal & Installation Procedure
1. Pull out the oil dipstick level gauge (1).
2. Unscrew the bolt (4) and remove the oil dipstick guide
tube (2).
Installation Notice
Tightening Torque
9--11NSm (80 -- 97 lb-in)
It is very hard to remove the oil dipstick guide tube
without special tool. If it is not necessary, do not re-
move the guide tube.
3. Installation should follow the removal procedure in
the reverse order.
4. Check for leaks by starting the engine.