2002 NISSAN TERRANO Service Repair Manual

REPLACEMENT OF IDLER GEAR BUSHING
1. Use a suitable tool to replace bushing.
2. Ream idler gear bushing.
Finished size:
42.00 - 42.02 mm (1.6535 - 1.6543 in)
Idler gear shaft
Install idler gear shaft so that oil hole of shaft faces upward.
CAMSHAFT AND CAMSHAFT BUSHING
Camshaft bushing clearance
Measure inside diameter of camshaft bushing (A) and outside
diameter of camshaft journal (B) with a suitable gauge.
Clearance between camshaft and bushing (A þ B):
Standard
0.020 - 0.109 mm
(0.0008 - 0.0043 in)
Limit
Less than 0.15 mm (0.0059 in)
REPLACING CAMSHAFT BUSHING
1. Remove welch plug.
Using Tool, remove camshaft bushings from the cylinder block.
Some bushings must be broken in order to remove.
2. Using Tool, install camshaft bushings as follows:
(1) Install camshaft bushings in the order of ªrearº, ª4thº, ª3rdº,
ª2ndº and ªfrontº. All bushings must be installed from the front.
(2) Face the cutout upward and toward the front of the engine dur-
ing installation.
SEM706
SEM669B
NEM171
SEM993B
SEM686B
ENGINE OVERHAULTD27Ti
Inspection (Cont'd)
EM-133

(3) Rear camshaft bushing.
Align the cutout of rear bushing with knock pin of replacer bar
before installation.
Insert rear bushing with replacer bar into the cylinder block.
Install guide plate with bolt holes (on the ªTDº mark side) fac-
ing upper side of cylinder block. Tighten bolts.
Drive replacer bar until the alignment mark on replacer bar is
aligned with the end of replacer guide.
Remove replacer set.
After installation, check that oil hole in camshaft bushing are
aligned with oil hole in cylinder block.
SEM995B
SEM110C
NEM172
ENGINE OVERHAULTD27Ti
Inspection (Cont'd)
EM-134

(4) 4th, 3rd and 2nd camshaft bushings.
Install in the same manner as rear camshaft bushing.
(5) Front camshaft bushing.
Using 1st bushing adapter, position front camshaft bushing so
that oil hole in cylinder block is aligned with oil hole in bushing.
The camshaft bushing of the front side must be inserted at 0.5
mm (0.020 in) from the extreme front of cylinder block.
NEM173
SEM001C
EEM105
ENGINE OVERHAULTD27Ti
Inspection (Cont'd)
EM-135

3. Check camshaft bushing clearance.
4. Install new welch plug with a drift.
Apply liquid sealer.
When setting 4th through 2nd bushings on replacer bar, tape
the bar to prevent movement.
CAMSHAFT ALIGNMENT
1. Check camshaft journal and cam surface for cracks, wear or
damage.
If fault is beyond limit, replace.
2. Check camshaft runout at center journal.
If runout is greater than specified limit, repair or replace cam-
shaft.
Camshaft runout
(Total indicator reading):
Standard
Less than 0.02 mm (0.0008 in)
Limit
Less than 0.06 mm (0.0024 in)
SEM987B
SEM034
SEM999B
SEM670B
ENGINE OVERHAULTD27Ti
Inspection (Cont'd)
EM-136

3. Measure camshaft end play between locating plate and gear.
If beyond the specified limit, replace camshaft locating plate.
Camshaft end play:
Standard
0.08 - 0.28 mm (0.0031 - 0.0110 in)
Limit
Less than 0.5 mm (0.020 in)
4. Measure camshaft cam height. If beyond the specified limit,
replace camshaft.
Cam height:
Standard
Intake
41.570 mm (1.6366 in)
Exhaust
41.900 mm (1.6496 in)
Limit
Intake
Less than 41.20 mm (1.6220 in)
Exhaust
Less than 41.40 mm (1.6299 in)
SEM671B
SEM037
ENGINE OVERHAULTD27Ti
Inspection (Cont'd)
EM-137

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 70ÉC (140
to 158ÉF)] 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 120É 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 OVERHAULTD27Ti
EM-138

(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 (0.002 - 0.01 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 OVERHAULTD27Ti
Assembly (Cont'd)
EM-139

2. Install pistons with connecting rods.
(1) Install them into corresponding cylinder using Tool.
IBe careful not to scratch cylinder wall with connecting rod.
IApply engine oil to cylinder wall, piston and bearing.
IThe 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 - 0.22 mm (0.0039 - 0.0087 in)
Limit
0.22 mm (0.0087 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 OVERHAULTD27Ti
Assembly (Cont'd)
EM-140