height NISSAN PICK-UP 1998 Manual PDF

3. Measure camshaft end play between locating plate and gear.
If beyond the specified limit, replace camshaft locating plate.
Camshaft end play: mm (in)
Standard
0.08 - 0.28 (0.0031 - 0.0110)
Limit
Less than 0.5 (0.020)
4. Measure camshaft cam height. If beyond the specified limit,
replace camshaft.
Cam height: mm (in)
Standard
Intake
41.88 - 41.92 (1.6488 - 1.6504)
Exhaust
41.88 - 41.92 (1.6488 - 1.6504)
Limit
Intake
Less than 41.40 (1.6299)
Exhaust
Less than 41.40 (1.6299)
Assembly
PISTON
Assemble pistons, piston pins, snap rings and connecting rods.
a. Numbers are stamped on the connecting rod and cap
corresponding 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.
SEM671B
SEM037
DEM054
SEM292
ENGINE OVERHAULTD
Inspection and Replacement (Cont'd)
EM-86

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
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

General Specifications
Engine model TD25
Cylinder arrangementIn-line
Number of cylinders 4
Valve arrangement OHV
Bore x stroke mm (in)92.9 x 92.0
(3.657 x 3.622)
Displacement cm
3(cu in) 2,494 (152.18)
Firing order 1-3-4-2
Number of
piston ringsCompression 2
Oil 1
Number of main bearings 5
Inspection and Adjustment
COMPRESSION PRESSURE
Unit: kPa (bar, kg/cm2, psi)/rpm
Standard 2,942 (29.4, 30, 427)/200
Minimum 2,452 (24.5, 25, 356)/200
Differential limit between cylinders 294 (2.9, 3, 43)/200
CYLINDER HEAD
Unit: mm (in)
Standard Limit
Head surface distortionLess than
0.07 (0.0028)0.2 (0.008)
Nominal cylinder head height 89.9 - 90.1 (3.539 - 3.547)
VALVE
Unit: mm (in)
SEM188
Engine TD25
Valve head diameter ``D''
Intake41.4 - 41.6
(1.630 - 1.638)
Exhaust36.9 - 37.1
(1.453 - 1.461)
Valve length ``L''
Intake
117 (4.61)
Exhaust
Valve stem diameter ``d''
Intake 7.962 - 7.977 (0.3135 - 0.3141)
Exhaust 7.945 - 7.960 (0.3128 - 0.3134)
Valve seat angle ``a''
Intake
45É - 45É30¢
Exhaust
Valve margin ``T'' limit 0.5 (0.020)
Valve stem end surface
grinding limit0.2 (0.008)
Valve clearance (Hot)
Intake
0.35 (0.0138)
Exhaust
SERVICE DATA AND SPECIFICATIONS (SDS)TD
EM-98

Valve guide
Unit: mm (in)
Standard Service
Valve guide outside diameter12.033 - 12.044
(0.4737 - 0.4742)Ð
Valve guide inner diameter
(Finished size)8.000 - 8.015
(0.3150 - 0.3156)
Cylinder head valve guide
hole diameter12.00 - 12.011
(0.4724 - 0.4729)Ð
Interference fit of valve guide0.022 - 0.044
(0.0009 - 0.0017)
Standard Max. tolerance
Stem to guide clearance
Intake0.023 - 0.053
(0.0009 - 0.0021)0.15 (0.0059)
Exhaust0.04 - 0.07
(0.0016 - 0.0028)0.20 (0.0079)
Valve deflection limit
Intake 0.30 (0.0118)
Exhaust 0.40 (0.0157)
Valve spring
Free length mm (in)
Painted red 53.4 (2.102)
Pressure height
mm/N (mm/kg, in/lb)
Painted red31.8/713.9 - 788.5
(31.8/72.8 - 80.4,
1.252/160.5 - 177.3)
Assembled height
mm/N (mm/kg, in/lb)
Standard42.3/314.8 - 361.9
(42.3/32.1 - 36.9,
1.665/70.8 - 81.4)
Limit42.3/270.7
(42.3/27.6, 1.665/60.9)
Out-of-square mm (in) 2.3 (0.091)
VALVE LIFTER AND PUSH ROD
Unit: mm (in)
Standard Limit
Valve lifter outer diameter25.960 - 25.970
(1.0220 - 1.0224)Ð
Cylinder block valve lifter
hole diameter26.000 - 26.033
(1.0236 - 1.0249)Ð
Valve lifter to lifter hole clear-
ance0.030 - 0.073
(0.0012 - 0.0029)0.20 (0.0079)
Push rod bend (TIR)*Less than
0.3 (0.012)0.5 (0.020)
*: Total indicator reading
Rocker shaft and rocker arm
Unit: mm (in)
Standard Limit
Rocker shaft
Outer diameter19.979 - 20.00
(0.7866 - 0.7874)Ð
Rocker shaft bend (TIR)0 - 0.15
(0 - 0.0059)Less than
0.30 (0.0118)
Rocker arm
Inner diameter20.014 - 20.035
(0.7880 - 0.7888)Ð
Clearance between rocker
arm and rocker shaft0.014 - 0.056
(0.0006 - 0.0022)0.15 (0.0059)
CYLINDER HEAD TO VALVE DISTANCE
Unit: mm (in)
SEM724C
Standard Limit
Intake0.7 - 1.3
(0.028 - 0.051)1.70 (0.067)
Exhaust0.7 - 1.3
(0.028 - 0.051)1.70 (0.067)
SERVICE DATA AND SPECIFICATIONS (SDS)TD
Inspection and Adjustment (Cont'd)
EM-99

CAMSHAFT AND CAMSHAFT BEARING
Unit: mm (in)
Standard Limit
Camshaft journal to bush-
ing clearance
[Oil clearance]0.020 - 0.109
(0.0008 - 0.0043)0.15 (0.0059)
Camshaft journal diam-
eter
Front50.721 - 50.740
(1.9969 - 1.9976)Ð
2nd50.521 - 50.540
(1.9890 - 1.9898)Ð
3rd50.321 - 50.340
(1.9811 - 1.9819)Ð
4th50.121 - 50.140
(1.9733 - 1.9740)Ð
Rear49.921 - 49.940
(1.9654 - 1.9661)Ð
Camshaft bend (Total
indicator reading)Less than
0.02 (0.0008)0.06 (0.0024)
Camshaft end play0.08 - 0.28
(0.0031 - 0.0110)0.50 (0.0197)
EM671
Standard Limit
Cam height ``A''
Intake & Exhaust41.88 - 41.92
(1.6488 - 1.6504)41.40 (1.6299)
SERVICE DATA AND SPECIFICATIONS (SDS)TD
Inspection and Adjustment (Cont'd)
EM-101

CYLINDER BLOCK AND CYLINDER LINER
Unit: mm (in)
DEM057-N
Nominal cylinder block height ``H''
(From crankshaft center)252.95 - 253.05 (9.9586 - 9.9626)
Surface flatness (Without cylinder liner)
StandardLess than 0.05 (0.0020)
Limit0.2 (0.008)
Cylinder bore (Without cylinder liner)
Inner diameter
Standard 95.900 - 95.920 (3.7756 - 3.7764)
Cylinder bore
Inner diameter
Standard
Grade No. 1 92.900 - 92.910 (3.6575 - 3.6579)
Grade No. 2 92.910 - 92.920 (3.6579 - 3.6583)
Grade No. 3 92.920 - 92.930 (3.6583 - 3.6587)
Wear limit0.20 (0.0079)
Out-of-round (X þ Y) standard Less than 0.020 (0.0008)
Taper (A þ B) standard Less than 0.020 (0.0008)
Projection ``S'' 0.02 - 0.09 (0.0008 - 0.0035)
Deviation of each cylinder ``S'' Less than 0.05 (0.0020)
Interference fit cylinder liner to block þ0.01 to 0.03 (þ0.0004 to 0.0012)
SERVICE DATA AND SPECIFICATIONS (SDS)TD
Inspection and Adjustment (Cont'd)
EM-102