Nissan Terrano model r20 series 2004. Manual — part 58
Assembly
PISTON
1. Assemble pistons, piston pins, snap rings and connecting rods.
a. Numbers are stamped on the connecting rod and cap cor-
responding to each cylinder. Care should be taken to avoid
a wrong combination including bearing.
b. When inserting piston pin in connecting rod, heat piston
with a heater or hot water [approximately 60 to 70°C (140
to 158°F)] and apply engine oil to pin and small end of
connecting rod.
c. After assembling, ascertain that piston swings smoothly.
2. Install piston assembly.
CAUTION:
a. Stretch the piston rings just enough to fit them in the pis-
ton grooves.
b. Be sure the manufacturer’s mark faces upward.
c. Install No. 1 piston ring (oil ring) in such a way that its gap
faces the direction of engine front, as shown in illustration
at left; and then install 2nd and top rings so that their gap
is positioned at 120° one to another.
CRANKSHAFT
1. Install crankshaft.
(1) Set main bearings in the proper position on cylinder block.
a. If either crankshaft, cylinder block or main bearing is
reused again, it is necessary to measure main bearing
clearance.
b. Upper bearings have oil hole and oil groove, however
lower bearings do not.
NEM174
NEM175
NEM182
NEM176
ENGINE OVERHAUL
TD27Ti
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(2) Apply engine oil to crankshaft journal and pin and install crank-
shaft.
(3) Install main bearings caps.
a) Install main bearing cap with the lowest number facing the front
of vehicle.
b) Apply engine oil to main bearing cap and cylinder block contact
surfaces.
c) Install rear oil seal assembly. Apply engine oil to contact surface
of rear end oil seal and crankshaft.
(4) Install crankshaft thrust washer at the 4th journal from front.
Install thrust washer so that oil groove can face crankshaft.
(5) Tighten bearing cap bolts gradually in stages, starting from two
to three separate stages, from center bearing and moving out-
ward in sequence.
(6) Measure crankshaft free end play at No. 4 bearing.
Crankshaft free end play:
Standard
0.060 - 0.25 mm (0.0024 - 0.0098 in)
Limit
0.4 mm (0.016 in)
If beyond the limit, replace No. 4 main bearing thrust washer.
Refer to SDS.
SEM674B
SEM057
SEM675B
SEM677B
SEM063
ENGINE OVERHAUL
TD27Ti
Assembly (Cont’d)
EM-139
2. Install pistons with connecting rods.
(1) Install them into corresponding cylinder using Tool.
I
Be careful not to scratch cylinder wall with connecting rod.
I
Apply engine oil to cylinder wall, piston and bearing.
I
The leaf type combustion chamber on piston head must be
facing toward the fuel pump side.
(2) Install connecting rod bearing caps.
3. Measure connecting rod side clearance.
Connecting rod side clearance:
Standard
0.10 - 0.32 mm (0.0039 - 0.0126 in)
Limit
0.32 mm (0.0126 in)
If beyond the limit, replace connecting rod and/or crankshaft.
4. Install oil strainer and oil pan.
5. Install all removed parts.
GEAR TRAIN
1. Set No. 1 piston at its Top Dead Center.
2. Align each gear mark and install gears.
EEM108
SEM678B
SEM488
NEM177
ENGINE OVERHAUL
TD27Ti
Assembly (Cont’d)
EM-140
TIMING GEAR CASE
Installation
1. Before installing timing gear case, remove all traces of liquid
gasket from mating surface using a scraper.
Also remove traces of liquid gasket from mating surface of front
plate.
2. Apply a continuous bead of liquid gasket to mating surface of
timing gear case and install the two rubber seals as shown.
I
Be sure liquid gasket is 2.5 to 3.5 mm (0.098 to 0.138 in)
wide.
I
Attach timing gear case to front plate within 20 minutes
after coating.
I
Wait at least 30 minutes before refilling engine coolant or
starting engine.
I
use Genuine Liquid Gasket or equivalent.
NEM183
NEM184
NEM185
SEM683B
ENGINE OVERHAUL
TD27Ti
Assembly (Cont’d)
EM-141
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