Page 1593 of 3573
ENGINE MECHANICAL 6A Ð 43
8. Camshaft Timing Gear
9. Camshaft Thrust Plate
10. Camshaft
11. Crankshaft Front Oil Seal
·With the oil seal pushed in deep, install the special
tool as shown in the illustration and remove the oil
seal.
Oil Seal Remover : 5-8840-2362-0
12. Timing Gear Case
13. Tappet
14. Piston Assembly
15. Main Bearing Cap Assembly
16. Crankshaft
17. Piston Cooling Oil Pipe
18. Cylinder Block
Page 1594 of 3573

6A Ð 44 ENGINE MECHANICAL
INSPECTION REPAIR
Make the necessary adjustments, repairs, and part replacements if excessive wear or damage is discovered
during inspection.
1. Remove the gasket and any other material adhering to
the upper surface of the cylinder block.
Be very careful not to allow any material to accidentally
drop into the cylinder block.
Be very careful not to scratch the cylinder block.
2. Carefully remove the oil pump, Rear Oil Seal retainer,
and oil pan installation surface seal.
3. Wipe the cylinder block clean.
Cylinder Liner Projection Inspection
1. Hold a straight edge 1 along the top edge of the cylinder
liner to be measured.
2. Use a feeler gauge 2 to measure each cylinder liner
projection.
The difference in the cylinder liner projection height
between any two adjacent cylinders must not exceed
0.03 mm (0.0012 in).
0.0 – 0.1 (0.0000 – 0.0039)
mm(in.) Standard
Flatness
1. Remove the cylinder body dowel.
2. Set the cylinder liner remover to the cylinder liner.
3. Check that the remover shaft ankle is firmly gripping the
cylinder liner bottom edge.
4. Slowly turn the remover shaft handle counterclockwise
to pull the cylinder liner free.
Cylinder Liner Remover Ankle: 5-8840-2304-0
Cylinder Liner Remover: 9-8523-1169-0
NOTE:
Take care not to damage the cylinder body upper during the
cylinder liner removal procedure.
5. Use a straight edge 1 and a feeler gauge 2 to measure the
four sides and the two diagonals of the cylinder body
upper face.
If the measured values exceed the limit, the cylinder
body must be replaced.
0.20 (0.0079)
mm(in.) Limit
Page 1595 of 3573

ENGINE MECHANICAL 6A Ð 45
Cylinder Liner Bore Measurement
Use a cylinder indicator to measure the cylinder liner bore
at measuring point in the thrust Ð and axial Ð
directions of the crankshaft.
Measuring Point 20mm (0.79 in)
If the measured value exceeds the specified limit, the cylinder
liner must be replaced.
NOTE:
The inside of the dry type cylinder liner is chrome plated. It
cannot be rebored or honed.
If the inside of the cylinder liner is scored or scorched, the
cylinder liner must be replaced.
Cylinder Liner Grade Selection
Measure the cylinder body inside diameter and select the
appropriate cylinder liner grade.
If the cylinder liner fitting interference is too small, engine
cooling efficiency will be adversely effected.
If the cylinder liner fitting interference is too large, it will be
difficult to insert the cylinder liner into the cylinder body.
NOTE:
There are two methods by which liners can be selected.
Method I
The cylinder block deck has been marked during production
to indicate the correct liner sizes. The liner grade (i.e. 1, 2, 3,
4) is indicated in permanent ink.
In the case of a questionable liner marking use the next
method for correct liner selection.
Method II
Cylinder Body Bore Measurement
1) Take measurements at measuring point (A) across
positions Ð , Ð , Ð , and Ð .
Measuring Point (A) 98 mm (3.86 in).
12233
1
112
2334
4
0.001 – 0.019 (0.0004 – 0.0007)
mm (in.) Standard Fifting Interference
Page 1596 of 3573

6A Ð 46 ENGINE MECHANICAL
Cylinder bore
diameter average
1Liner outside
diameterLiner
Grade
97.001-97.010
(3.8189-3.8193)
97.011-97.020
(3.8193-3.8197)
97.021-97.030
(3.8197-3.8201)
97.031-97.040
(3.8201-3.8205)97.011-97.020
(3.8193-3.8197)
97.021-97.030
(3.8197-3.8201)
97.031-97.040
(3.8201-3.8205)
97.041-97.050
(3.8205-3.8209)
2
3
4
mm (in.) 2) Calculate the average value of the four measurements
to determine the correct cylinder grade.
3) Consult the following table with the resultant diameter
for the correct liner application.
Cylinder Liner Installation
1. Cylinder Liner Installation Using The Special Tool.
1) Use new kerosene or diesel oil to thoroughly clean
the cylinder liners and horse.
2) Use compressed air to blow-dry the cylinder liner
and bore surfaces.
Cylinder Liner Installer : 5-8840-2313-0
NOTE:
All foreign material must be carefully removed from the
cylinder liner and the cylinder bore before installation.
3) Insert the cylinder liner 1 into the cylinder body 2
from the top of the cylinder body.
Page 1597 of 3573

ENGINE MECHANICAL 6A Ð 47
4) Set the cylinder liner installer  to the top of the
cylinder liner.
Position the cylinder body so that the installer center
is directly beneath the bench press shaft center Ã.
Cylinder Liner Installer: 5-8840-2313-0
NOTE:
Check that the cylinder liner is set perpendicular to the
bench press and that there is no wobble.
5) Use the bench press to apply a seating force of
4,900 N (500kg/1,102.5 lb) to the cylinder liner.
6) Apply a force of 24,500 N (2,500 kg /5,512.5 lb) to fully
seat the cylinder liner.
7) After installing the cylinder liner, measure the cylin-
der liner projection.
8) After installing the cylinder liner, measure the cylin-
der liner projection.
Refer to ÒCylinder Liner Projection InspectionÓ in
this Section
Measure the cylinder liner bore inside diameter and
select the appropriate piston grade.
CAUTION:
After installed the piston assembly. Check and see that there
is appropriate clearance between pistons and oil jet pipes by
rotating crankshaft slowly.
16. Crankshaft
·Install the main bearings to the cylinder body and
the main bearing caps.
·Be sure that they are positioned correctly.
·Apply new engine oil to the upper and lower main
bearing faces
·Carefully mount the crankshaft.
This illustration 4JG2-T
REASSEMBLY
18. Cylinder Block
17. Piston Cooling Oil Pipe
1) Fix the oil jet pipes with knock pins on the cylinder
block.
2) Install the oil pipe for piston cooling in the cylinder
block, tightening a relief valve 1 and four joint bolts
2 to the specified torque.
Relief valve fixing bolt
29 (3.0/22)
Oil pipe fixing bolts
19 (1.9/14)
8 (0.8/69 lb·in.) M8
M6N·m (kg·m/lb·ft)
N·m (kg·m/lb·ft)
Page 1598 of 3573

6A Ð 48 ENGINE MECHANICAL
·Apply engine oil to the thrust washer.
·Assemble the thrust washer to the No. 3 bearing
journal. The oil grooves must face the crankshaft.
15. Main Bearing Cap Assembly
·Apply the recommended liquid gasket or its equiva-
lent to the No. 5 crankshaft bearing cap cylinder
body fiting surfaces at points 1 and 2 shown in the
illustration.
NOTE:
Be sure that the bearing cap fitting surface is completely
free of oil before applying the liquid gasket.
Do not allow the liquid gasket to obstruct the cylinder
thread holes and bearings.
·Install the bearing caps with the bearing cap head
arrow mark facing the front of the engine.
·Apply engine oil to the crankshaft bearing cap bolts.
·Tighten the crankshaft bearing cap bolts to the
specified torque a little at a time in the sequence
shown in the illustration.
NOTE:
Check to see that the crankshaft turns smoothly by rotating
it manually.
·Apply the recommended liquid packing or its equiva-
lent to the No. 5 crankshaft bearing cap 3 as shown
in the illustration.
Install the arch packing 4 to the No. 5 bearing cap.
NOTE:
Take care to install the arch packing in the groove of bearing
cap correctly.
Take care not to scratch the arch packing outer surface.
167 (17.0/123)N·m (kg·m/lb·ft)
Page 1599 of 3573
ENGINE MECHANICAL 6A Ð 49
14. Piston Assembly
·Refer to ÒPiston and connecting rodÓ in this Section.
13. Tappet
12. Timing Gear Case
1) Install the timing gear case to the cylinder body.
NOTE:
Take care not to twist the front oil seal.
2) Tighten the timing gear case bolt together with the
timing gear case gasket to the specified torque.
19 (1.9/14)N·m (kg·m/lb·ft)
3) Cut away the gasket protruding above the fitting
surfaces (as shown in the illustration).
11. Crankshaft Front Oil Seal
·Use the installer to install the front oil seal 1 to
the gear case cover 2.
Oil Seal Installer: 5-8840-2061-0
Note the oil seal installation depth 3 shown in
the illustration.
Depth 3 = 1 mm (0.039 in.)
10. Camshaft
·Refer to ÔCamshaft, TappetÕ in Section 6A.
9. Camshaft Thrust Plate
·Install the thrust plate to the cylinder body and
tighten the thrust plate bolts to specified torque.
18 (1.8/13)N·m (kg·m/lb·ft)
Page 1600 of 3573

6A Ð 50 ENGINE MECHANICAL
8. Camshaft Timing Gear
1) Install the camshaft timing gear to the camshaft.
The timing gear mark ("Y - Y") must be facing
outword.
2) Tighten the timing gear to the specified torque.
64 (6.5/47)N·m (kg·m/lb·ft)
7. Oil Pump Assembly
·Refer to ÔOil pumpÕ in Section 6A2.
6. Crankcase Assembly
·Refer to ÔCrankcaseÕ in Section 6A2.
5. Crankshaft Rear Oil Seal
1) Tighten the adapter to the crankshaft rear and
section with 2 bolts.
2) Insert the oil seal into the peripheral section of the
adapter,
3) Insert the sleeve into the adapter section, and 1)
tighten it with a bolt (M12 x 1.75L = 70) until the
adapter section hits the sleeve.
4) Remove the adapter and the sleeve.
5) With the seal pressed in, check the dimension of
the oil seal section.
Standard Dimension = 12.5 ± 0.3 mm
Oil Seal Installer: 5-8840-2359-0
4. Cylinder Block Rear Plate
·Tighten the cylinder block rear plate fixing bolt to the
specified torque
82 (8.4/61)N·m (kg·m/lb·ft)
3. Flywheel
·Refer to ÔCrankshaftÕ in Section 6A.
2. Cylinder Head Gasket
1. Carefully remove carbon deposits and gasket
residue from the piston top face and the cylinder
body upper surface.