1998 NISSAN PICK-UP Repair Manual

(5) Tighten main bearing cap bolts gradually in stages, starting
from two to three separate stages, from center bearing and
moving outward in sequence.
: 167 - 177 Nzm (17.0 - 18.0 kg-m, 123 - 130 ft-lb)
(6) Measure crankshaft free end play at No. 4 bearing.
Crankshaft free end play: mm (in)
Standard
0.055 - 0.140 (0.0022 - 0.0055)
Limit
0.40 (0.0157)
If beyond the limit, replace No. 4 main bearing thrust
washer. Refer to SDS, EM-106.
2. Install pistons with connecting rods.
(1) Install them into corresponding cylinder using Tool.
lBe careful not to scratch cylinder wall with connecting
rod.
lInsert the connecting rod. Do not allow the larger end to
touch the oil jet.
lApply engine oil to cylinder wall, piston and bearing.
lThe leaf type combustion chamber on piston head must
be at right side of engine.
(2) Install connecting rod bearing caps.
SEM675B
SEM677B
SEM063
DEM056.DEM056
SEM678B
ENGINE OVERHAULTD
Assembly (Cont'd)
EM-88

3. Measure connecting rod side clearance.
Connecting rod side clearance: mm (in)
Standard
0.10 - 0.22 (0.0039 - 0.0087)
Limit
0.22 (0.0087)
If beyond the limit, replace connecting rod and/or crank-
shaft.
GEAR TRAIN
1. Set No. 1 piston at TDC on its compression stroke.
2. Align each gear mark and install gears.
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 dust cover.
SEM488
DEM016
MEM120A
MEM121A
ENGINE OVERHAULTD
Assembly (Cont'd)
EM-89

lBe sure liquid gasket diameter is 2.5 to 3.5 mm (0.098 to
0.138 in).
lAttach timing gear case to front plate within 10 minutes
after coating.
lWait at least 30 minutes before refilling engine coolant
or starting engine.
lUse Genuine Liquid Gasket or equivalent.
MEM122A
DEM064
SEM683B
ENGINE OVERHAULTD
Assembly (Cont'd)
EM-90

General Specifications
Cylinder arrangement 4, in-line
Displacement cm
3(cu in) 2,389 (145.78)
Bore x stroke mm (in) 89 x 96 (3.50 x 3.78)
Valve arrangement OHC
Firing order 1-3-4-2
Number of piston rings
Compression 2
Oil 1
Number of main bearings 5
Compression ratio 8.6
Unit: kPa (bar, kg/cm2, psi)/rpm
Compression pressure
Standard 1,324 (13.24, 13.5, 192)/300
Minimum 981 (9.8, 10, 142)/300
Differential limit between cylin-
ders98 (0.98, 1.0, 14)/300
Inspection and Adjustment
CYLINDER BLOCK
SEM618F
Unit: mm (in)
Standard Limit
DistortionÐ 0.1 (0.004)
Cylinder boreInner diameterGrade 1 89.000 - 89.010 (3.5039 - 3.5043)
0.2 (0.008)* Grade 2 89.010 - 89.020 (3.5043 - 3.5047)
Grade 3 89.020 - 89.030 (3.5047 - 3.5051)
Out-of-round (X þ Y) Less than 0.015 (0.0006) Ð
Taper (A þ B) Less than 0.010 (0.0004) Ð
Difference in inner diameter between cylinders Less than 0.05 (0.0020) 0.2 (0.008)
Piston-to-cylinder clearance 0.010 - 0.020 (0.0004 - 0.0008) Ð
Cylinder block height
(From crankshaft center)246.95 - 247.05 (9.7224 - 9.7264) 0.2 (0.008)**
* Wear limit
** Total amount of cylinder head resurfacing and cylinder block resurfacing
CYLINDER HEAD
Unit: mm (in)
Standard Limit
Height (H)98.8 - 99.0
(3.890 - 3.898)0.2 (0.008)*
Surface distortion 0.03 (0.0012) 0.1 (0.004)
* Total amount of cylinder head resurfacing and cylinder block resur-
facing
SERVICE DATA AND SPECIFICATIONS (SDS)KA
EM-91

VALVE GUIDE
SEM401E
Unit: mm (in)
Standard Service Limit
Intake Exhaust Intake Exhaust Ð
Length (L) 52.6 (2.071) 56.0 (2.205) 52.6 (2.071) 56.0 (2.205) Ð
Outer diameter (D)11.023 - 11.034
(0.4340 - 0.4344)12.023 - 12.034
(0.4733 - 0.4738)11.223 - 11.234
(0.4418 - 0.4423)12.223 - 12.234
(0.4812 - 0.4817)Ð
Inner diameter (d)
(Finished size)7.000 - 7.018
(0.2756 - 0.2763)8.000 - 8.018
(0.3150 - 0.3157)7.000 - 7.018
(0.2756 - 0.2763)8.000 - 8.018
(0.3150 - 0.3157)Ð
Cylinder head hole diameter10.975 - 10.996
(0.4321 - 0.4329)11.975 - 11.996
(0.4715 - 0.4723)11.175 - 11.196
(0.4400 - 0.4408)12.175 - 12.196
(0.4793 - 0.4802)Ð
Interference fit 0.027 - 0.059 (0.0011 - 0.0023) Ð
Stem to guide clearance0.020 - 0.053
(0.0008 - 0.0021)0.040 - 0.070
(0.0016 - 0.0028)0.020 - 0.053
(0.0008 - 0.0021)0.040 - 0.070
(0.0016 - 0.0028)0.1 (0.004)
Tapping length (,) 14.9 - 15.1 (0.587 - 0.594)
VALVE SEAT
SEM402E
Unit: mm (in)
Standard Service
Intake Exhaust Intake Exhaust
Cylinder head seat recess
diameter36.000 - 36.016
(1.4173 - 1.4179)42.000 - 42.016
(1.6535 - 1.6542)36.500 - 36.516
(1.4370 - 1.4376)42.500 - 42.516
(1.6732 - 1.6739)
Valve seat outer diameter
(D
1)36.080 - 36.096
(1.4205 - 1.4211)42.080 - 42.096
(1.6567 - 1.6573)36.580 - 36.596
(1.4402 - 1.4408)42.580 - 42.596
(1.6764 - 1.6770)
Face angle (a) 45É 45É 45É 45É
Contacting width (W) 1.6 - 1.7 (0.063 - 0.067) 1.7 - 2.1 (0.067 - 0.083) 1.6 - 1.7 (0.063 - 0.067) 1.7 - 2.1 (0.067 - 0.083)
SERVICE DATA AND SPECIFICATIONS (SDS)KA
Inspection and Adjustment (Cont'd)
EM-92

VALVE
SEM188A
Unit: mm (in)
Standard Limit
Valve head diameter (D)In.34.0 - 34.2
(1.339 - 1.346)Ð
Ex.40.0 - 40.2
(1.575 - 1.583)Ð
Valve length (L)In.121.05 - 121.65
(4.7657 - 4.7894)Ð
Ex.122.02 - 122.62
(4.8039 - 4.8275)Ð
Valve stem diameter (d)In.6.965 - 6.980
(0.2742 - 0.2748)Ð
Ex.7.948 - 7.960
(0.3129 - 0.3134)Ð
Valve face angle (a)In. 45É15¢- 45É45¢Ð
Ex. 45É15¢- 45É45¢Ð
Valve head margin (T)In.1.15 - 1.45
(0.0453 - 0.0571)
0.5 (0.020)
Ex.1.35 - 1.65
(0.0531 - 0.0650)
Valve clearance 0 (0)
VALVE SPRING
Unit: mm (in)
Standard Limit
Intake Exhaust Intake Exhaust
Free height (H)Outer 57.44 (2.2614) 53.21 (2.0949) Ð Ð
Inner 53.34 (2.1000) 47.95 (1.8878) Ð Ð
Pressure
N (kg, lb) at heightOuter604.1 (61.6, 135.8)
at 37.6 (1.480)640.4 (65.3, 144.0)
at 34.1 (1.343)567.8 (57.9, 127.7)
at 37.6 (1.480)620.8 (63.3, 139.6)
at 34.1 (1.343)
Inner284.4 (29.0, 63.9)
at 32.6 (1.283)328.5 (33.5, 73.9)
at 29.1 (1.146)266.8 (27.2, 60.0)
at 32.6 (1.283)318.7 (32.5, 71.7)
at 29.1 (1.146)
Out-of-squareOuter Ð Ð 2.5 (0.098) 2.3 (0.091)
Inner Ð Ð 2.3 (0.091) 2.1 (0.083)
SERVICE DATA AND SPECIFICATIONS (SDS)KA
Inspection and Adjustment (Cont'd)
EM-93

CAMSHAFT AND CAMSHAFT BEARING
SEM568A
EM120
Unit: mm (in)
Standard Limit
Cam height (A) 44.43 - 44.58 (1.7492 - 1.7551) Ð
Valve lift (h) 9.7 (0.382) Ð
Wear limit of cam height Ð 0.2 (0.008)
Camshaft journal to bearing clearance 0.045 - 0.090 (0.0018 - 0.0035) 0.12 (0.0047)
Inner diameter of camshaft bearing 33.000 - 33.025 (1.2992 - 1.3002) Ð
Outer diameter of camshaft journal (D) 32.935 - 32.955 (1.2967 - 1.2974) Ð
Camshaft runout 0 - 0.02 (0 - 0.0008) Ð
Camshaft end play 0.07 - 0.15 (0.0028 - 0.0059) 0.2 (0.008)
Valve timing (Degree on crankshaft)a 232 Ð
b 232 Ð
cþ5 Ð
d57 Ð
e11 Ð
f41 Ð
ROCKER ARM AND ROCKER SHAFT
Unit: mm (in)
Rocker arm to shaft clearance 0.012 - 0.050 (0.0005 - 0.0020)
Rocker shaft diameter21.979 - 22.000
(0.8653 - 0.8661)
Rocker arm rocker shaft hole
diameter22.012 - 22.029
(0.8666 - 0.8673)
SERVICE DATA AND SPECIFICATIONS (SDS)KA
Inspection and Adjustment (Cont'd)
EM-94

PISTON, PISTON RING AND PISTON PIN
Piston
SEM444C
Unit: mm (in)
Piston skirt
diameter (A)StandardGrade No. 188.970 - 88.980
(3.5027 - 3.5031)
Grade No. 288.980 - 88.990
(3.5031 - 3.5035)
Grade No. 388.990 - 89.000
(3.5035 - 3.5039)
Service
(Oversize)0.5 (0.020)89.470 - 89.500
(3.5224 - 3.5236)
1.0 (0.039)89.970 - 90.000
(3.5421 - 3.5433)
Dimension (a) Approximately 52 (2.05)
Piston pin hole diameter (d)21.002 - 21.008
(0.8268 - 0.8271)
Piston-to-cylinder bore clearance 0.020 - 0.040 (0.0008 - 0.0016)
Piston pin
Unit: mm (in)
Standard
Piston pin outer diameter20.993 - 20.998
(0.8265 - 0.8267)
Pin to piston pin hole clearance0.008 - 0.012
(0.0003 - 0.0005)
Piston pin to connecting rod
clearanceþ0.015 to þ0.033
(þ0.0006 to þ0.0013)
Piston ring
Unit: mm (in)
Standard Limit
Side clear-
anceTop0.010 - 0.030
(0.0004 - 0.0012)0.1 (0.004)
2nd0.030 - 0.070
(0.0012 - 0.0028)0.1 (0.004)
Oil0.085 - 0.115
(0.0033 - 0.0045)*0.1 (0.004)
Ring gapTop0.28 - 0.43
(0.0110 - 0.0169)0.5 (0.020)
2nd0.45 - 0.60
(0.0177 - 0.0236)0.5 (0.020)
Oil
(rail ring)0.20 - 0.60
(0.0079 - 0.0236)0.5 (0.020)
*: Riken-make
CONNECTING ROD
SEM216E
Unit: mm (in)
Standard Limit
Center distance (S)164.95 - 165.05
(6.4941 - 6.4980)Ð
Bend
[per 100 mm (3.94 in)]Ð 0.15 (0.0059)
Torsion
[per 100 mm (3.94 in)]Ð 0.3 (0.012)
Small end inner diameter (d)20.965 - 20.978
(0.8254 - 0.8259)Ð
Connecting rod big end inner
diameter (D)53.000 - 53.013
(2.0866 - 2.0871)Ð
Side clearance0.2 - 0.4
(0.008 - 0.016)0.6 (0.024)
SERVICE DATA AND SPECIFICATIONS (SDS)KA
Inspection and Adjustment (Cont'd)
EM-95