2000 NISSAN PATROL Electronic Repair Manual

Connecting rod bearing undersize list
Unit: mm (in)
Size Thickness
US 025 1.630 - 1.638 (0.0642 - 0.0645)
US 050 1.755 - 1.763 (0.0691 - 0.0694)
US 075 1.880 - 1.888 (0.0740 - 0.0743)
US 100 2.005 - 2.013 (0.0789 - 0.0793)
CAUTION:
When grinding crank pins to use undersize bearings, avoid
damaging corners of fillet.
Corner dimension (Standard):
Pin
3.3 - 3.7 mm (0.130 - 0.146 in)
Journal
2.8 - 3.2 mm (0.110 - 0.126 in)
MAIN BEARING OIL CLEARANCE
Method by measurement
+Install main bearings to cylinder block and bearing caps, and
tighten bearing cap bolts to the specified torque. Measure
main bearing inner diameter.
Bearing clearance = Bearing inner diameter þ Crankshaft
journal outer diameter
Standard: 0.035 - 0.083 mm (0.0014 - 0.0033 in)
+If out of specification, check main bearing housing inner
diameter and crankshaft journal outer diameter, and select
appropriate main bearing to adjust clearance to specifica-
tions.
Refer to ªMain bearing undersize listº on the next page.
Method using plastigage
+Remove contamination such as oil, dust completely from
crankshaft journals and each bearing surface.
+Cut plastigage slightly shorter than bearing width, place it in
crankshaft direction, avoiding oil holes.
+Install main bearings to caps, and tighten connecting rod nuts
to the specified torque.
CAUTION:
Never rotate crankshaft.
+Remove bearing caps and bearings, and measure plastigage
width using scale on plastigage bag.
FEM119
FEM120
CYLINDER BLOCKZD
Inspection (Cont'd)
EM-1079

CAUTION:
If out of specification, take same action mentioned in
ªMethod by measurementº.
Undersize bearing usage
+If bearing clearance is out of specifications for main bearings
in standard size, use undersize bearings.
+When using undersize bearings, measure bearing inner
diameter with bearing installed, and grind crank journals to
adjust clearance to specification.
Main bearing undersize list
Unit: mm (in)
Size Thickness
US 025 2.130 - 2.138 (0.0839 - 0.0842)
US 050 2.255 - 2.263 (0.0888 - 0.0891)
US 075 2.380 - 2.388 (0.0937 - 0.0940)
US 100 2.505 - 2.513 (0.0986 - 0.0989)
CAUTION:
When grinding crank journals to use undersize bearings,
avoid damaging corners of fillet.
Corner dimension (Standard):
Pin
3.3 - 3.7 mm (0.130 - 0.146 in)
Journal
2.8 - 3.2 mm (0.110 - 0.126 in)
MAIN BEARING CRUSH HEIGHT
+Tighten bearing caps to the specified torque with main bear-
ings installed, and remove caps. The bearing end must then
be higher than the flat surface.
Standard: Crush height must exist.
+If out of specification, replace main bearings.
FEM119
FEM122
CYLINDER BLOCKZD
Inspection (Cont'd)
EM-1080

Assembly
1. Blow air sufficiently to inside coolant passage, oil passage,
crankcase, and cylinder bore to remove foreign matter.
2. Install main bearings and thrust bearings.
1) Remove contamination, dust and oil from bearing mounting
positions on cylinder block and main bearing caps.
2) Install thrust bearings on both sides of No. 4 housing on cyl-
inder block.
+Install thrust bearings with oil groove facing to crankshaft arm
(outside).
3) Being careful with the direction, install main bearings.
+Install main bearings with the oil holes and grooves onto the
cylinder block side, and those without oil holes and grooves
onto the lower cylinder block side.
+While installing bearings, apply engine oil to bearing surfaces
(inside). Do not apply oil to rear surfaces, but clean them
completely.
+Align stopper notches on bearings to install them.
+Check that the oil holes on the cylinder block body are mated
with the oil hole positions on the bearings.
3. Install crankshaft to cylinder block.
+While rotating crankshaft by hand, check for smooth rotation.
4. Install lower cylinder block.
+Apply a continuous bead of liquid gasket to lower cylinder
block as shown in the figure.
+Using slots on engine sub-attachment, install the lower cyl-
inder block to the cylinder block, avoiding interference of
dowel pins.
5. Tighten lower cylinder mounting bolts to the torque shown
below in 3 consecutive steps in the order shown in the fig-
ure.
Unit: Nzm (kg-m, ft-lb)
Main bolt (Nos. 1 - 10) Sub-bolt (Nos. 11 - 20)
1st 20 (2.0, 14) 98 (10, 72)
2nd 98 (10, 72) 20 (2.0, 14)
3rd 167 - 176 (17 - 18, 123 - 130) 40 - 46 (4.0 - 4.7, 29 - 33)
+Sub-bolt No. 17 has shorter length than that of other sub-
bolts.
FEM126
FEM127
FEM128
FEM092
CYLINDER BLOCKZD
EM-1081

6. Install mounting bolts for engine sub-attachment shown by
arrows in the figure.
+After tightening bolts to the specified torque, check crank-
shaft for smooth rotation.
+Check crankshaft end play.
Refer to EM-1072, ªCRANKSHAFT END PLAYº.
7. Install pistons to connecting rod.
1) Using long nose pliers, install snap rings to grooves on pis-
ton rear side.
+Fit snap rings correctly into grooves.
2) Install pistons to connecting rods.
+Using industrial dryer, heat pistons up to approx. 60 to 70ÉC
(140 to 158ÉF) until piston pin can be pressed down by fin-
ger touch. Then insert piston pins into piston and connecting
rod from front side of piston toward rear.
+Assemble piston and connecting rod with front mark of pis-
ton crown and cylinder No. stamped on connecting rod being
positioned as shown in the figure.
3) Install snap rings to front side of pistons.
+Refer to above 1) for precaution on snap ring installation.
+After installation, check connecting rods for smooth move-
ment.
8. Use piston ring expander (multi-purpose tool) to install piston
rings.
CAUTION:
When installing, prevent piston from being damaged.
+Install top ring and second ring with stamped surfaces fac-
ing upward.
Identification stamp:
Top ring: R
Second ring: RN
9. Install connecting rod bearings to connecting rods and caps.
+While installing connecting rod bearings, apply engine oil to
bearing surfaces (inside). Do not apply oil to rear surfaces,
but clean them completely.
+Align stoppers on connecting rod bearings with connecting
rod stopper notches to install connecting rod bearings.
FEM091
FEM131
FEM132
FEM133
CYLINDER BLOCKZD
Assembly (Cont'd)
EM-1082

10. Install piston and connecting rod assembly to crankshaft.
+Move crankshaft pin to be removed to BDC.
+Align cylinder position with cylinder No. on connecting rod to
install piston and connecting rod assembly.
+Using piston ring compressor (multi-purpose tool), install pis-
ton and connecting rod assembly with front mark on piston
crown facing toward the front side of engine.
CAUTION:
When installing piston and connecting rod assembly, pre-
vent the big end of connecting rod from interfering with oil
jet.
11. Install connecting rod caps and mounting nuts.
+Align cylinder No. stamped on connecting rod with that on
cap to install connecting rod cap.
+After tightening nuts, check crankshaft for smooth rotation.
+Check connecting rod side clearance.
Refer to EM-1072, ªCONNECTING ROD SIDE CLEAR-
ANCEº.
12. Install rear oil seal and retainer assembly.
+Apply a continuous bead of liquid gasket to rear oil seal and
retainer assembly as shown in the figure.
13. Press fit pilot bushing into flywheel (M/T model).
1) Using drift with outer diameter of 35 mm, press fit spacer until
it is in contact with the flywheel to prevent displacement at
removal.
2) Using drift with outer diameter of 20 mm, press fit pilot bush-
ing by the length shown in the figure.
14. Install rear plate.
+Refer to the figure for gasket installation direction.
FEM134
FEM131
FEM053
SEM366G
SEM367G
CYLINDER BLOCKZD
Assembly (Cont'd)
EM-1083

15. Install removed parts to engine in the reverse order of disas-
sembly.
16. Remove engine from engine stand.
17. Install flywheel (M/T model) or drive plate (A/T model).
+Install pilot converter, drive plate, and reinforcing plate in
direction shown in the figure.
+Using the same method as disassembly, secure crankshaft
and tighten mounting bolts.
+Tighten mounting bolts for flywheel or drive plate in order
shown in the figure.
FEM137
FEM138
CYLINDER BLOCKZD
Assembly (Cont'd)
EM-1084

General Specifications
Cylinder arrangementIn-line 4
Displacementcm
3(cu in) 2,953 (180.19)
Bore and strokemm (in) 96 x 102 (3.78 x 4.02)
Valve arrangementDOHC
Firing order1-3-4-2
Number of piston ringsCompression 2
Oil1
Number of main bearings5
Compression ratio17.9
Compression Pressure
Unit: kPa (bar, kg/cm2, psi)/200 rpm
Compression pressureStandard 2,942 (29.4, 30.0, 427)
Minimum 2,452 (24.5, 25.0, 356)
Differential limit between cylinders 294 (2.94, 3.0, 43)
Cylinder Head
Unit: mm (in)
Standard Limit
Head surface distortion Less than 0.03 (0.0012) 0.2 (0.008)
SEM368G
Valve
VALVE
Unit: mm (in)
FEM067
SERVICE DATA AND SPECIFICATIONS (SDS)ZD
EM-1085

Valve head diameter ªDºIntake 31.9 - 32.1 (1.256 - 1.264)
Exhaust 29.9 - 30.1 (1.177 - 1.185)
Valve length ªLºIntake 113.5 (4.4685)
Exhaust 113.5 (4.4685)
Valve stem diameter ªdºIntake 6.962 - 6.977 (0.2741 - 0.2747)
Exhaust 6.945 - 6.960 (0.2734 - 0.2740)
Valve seat angle ªaºIntake
45É00¢- 45É30¢
Exhaust
Valve margin ªTºIntake 1.5 (0.059)
Exhaust 1.5 (0.059)
Valve stem end surface grinding limitLess than 0.2 (0.008)
VALVE CLEARANCE
Unit: mm (in)
Cold
Intake0.30 - 0.40 (0.0118 - 0.0157)
Exhaust0.30 - 0.40 (0.0118 - 0.0157)
*: Approximately 80ÉC (176ÉF)
AVAILABLE SHIMS
Thickness mm (in) Identification mark
2.35 (0.0925) 2.35
2.40 (0.0945) 2.40
2.45 (0.0965) 2.45
2.50 (0.0984) 2.50
2.55 (0.1004) 2.55
2.60 (0.1024) 2.60
2.65 (0.1043) 2.65
2.70 (0.1063) 2.70
2.75 (0.1083) 2.75
2.80 (0.1102) 2.80
2.85 (0.1122) 2.85
2.90 (0.1142) 2.90
2.95 (0.1161) 2.95
3.00 (0.1181) 3.00
3.05 (0.1201) 3.05
SEM252G
SERVICE DATA AND SPECIFICATIONS (SDS)ZD
Valve (Cont'd)
EM-1086