Isuzu NPR 4J Series - Page 40

00 – 36 SERVICE INFORMATION
mm (in)
Service standard Service limit
Parts Items
4JG2
4JB1 / 4JB1T /
4JB1TC
4JG2
4JB1 / 4JB1T /
4JB1TC
Remarks
Piston diameter 95.365 - 95.404
(3.7545-3.9039)
92.985 - 93.024
(3.6600-3.6623)
-Piston,
Piston
pin,
Piston
ring and
Connect-
ing rod
Piston Clearance
(Between piston and
Cylinder liner)
Piston ring gap 1st
2nd
Oil
Piston ring clearance 1st
2nd
0.047 - 0.065
(0.0019-0.0026)
0.20 - 0.35
(0.0079 –
0.0138)
0.37 - 0.52
(0.0146 -
0.0205)
0.20 - 0.40
(0.0079 -
0.00157)
0.09 - 0.13
(0.0035 -
0.0051)
0.05 - 0.09
(0.002 -
0.0035)
0.025 - 0.045
(0.0010-0.0018)
0.20 - 0.40
(0.0079 –
0.0157)
0.20 - 0.40
(0.0079 -
0.00157)
0.10 - 0.30
(0.0039 -
0.0118)
0.090 - 0.125
(0.0035 -
0.0049)
0.050 - 0.075
(0.0020 -
0.0030)
-
1.5 (0.0591)
1.5 (0.0591)
1.5 (0.0591)
0.15 (0.0059)
Oil 0.03 - 0.07
(0.0012 - 0.0028)
0.15 (0.0059)
Piston pin diameter 33.995 - 34.000
(1.3384-1.3386)
30.995 - 31.000
(1.2202-1.2204)
33.970
(1.3374)
30.970
(1.2190)
Fitting interference
(Between connecting
rod and piston pin)
Fitting interference
(Between piston and
piston pin)
Connecting rod
alignment Bend
Twist
Piston pin and Connecting
Rod Bushing Clearance
Connecting rod thrust
clearance
0.008 - 0.020
(0.0003 - 0.0008)
0.002 - 0.015
(0.0001 - 0.0006)
0.08 (0.0031) or less
0.05 (0.0020) or less
0.008 - 0.020
(0.0003 - 0.0008)
0.230 (0.0091)
0.05 (0.0020)
0.04 (0.0016)
0.20 (0.0079)
0.15 (0.0059)
0.050 (0.0020)
0.35 (0.0138)
0.029 -0.083 0.029 - 0.066 0.100 (0.0039)
(0.0014 - (0.0011 -
Oil clearance
(Between crank pin and
Connecting rod) 0.0033) 0.0026)
Per 100
(3.94)
Per 100
(3.94)