Isuzu 4JB1 Service Information page 33

Parts Items
Push rod Curvature
Camshaft End play
Cam lobe height
Journal diameter
Runout
Camshaft bearing inside
diameter
Camshaft oil clearance
Tappet Outside diameter
Oil clearance
(Between tappet and
cylinder body)
Rocker Rocker shaft outside
arm diameter
Assembly
Rocker arm inside
diameter
Oil clearance
(Between rocker arm and
rocker shaft)
Rocker shaft runout
Oil pump Oil clearance
Body and gear
Body cover and gear
Crankshaft Thrust clearance
Main bearing clearance
(Between main bearing
and Crankshaft)
Crankshaft runout
Main journal diameter
Crankshaft pin diameter
Crankshaft Journal and
Crank Pin uneven wear
Crank Pin and Bearing
Clearance.
Service standard
4JB1 / 4JB1T /
4JG2
4JB1TC
-
0.08 (0.0031)
42.02 (1.6543)
49.945 - 49.975(1.9663-1.9675)
0.02 (0.0008) or less
50.000 - 50.030
(1.9685 - 1.9697)
0.025 - 0.085
(0.0098 - 0.00334)
12.97 - 12.99 (0.5106 - 0.5114)
0.03 (0.0118)
18.98 - 19.00
(0.7472 - 0.7480)
19.036 - 19.060
(0.7494 - 0.7504)
0.06 - 0.08
(0.00235 - 0.00315)
-
0.14 (0.0055) 0.13 - 0.14
(0.0051-0.0055)
0.06 (0.0024) 0.02 - 0.07
(0.0008-0.0028)
0.10 (0.0039)
0.031-0.063 0.035-0.080
(0.0012-0.0025) (0.0014-0.0032)
0.05 (0.00197) or less
69.917 - 69.932 (2.7526 - 2.7532)
52.915 - 52.930 (2.0833 - 2.0839)
0.05 (0.002) or less
0.029 - 0.066 (0.0011 - 0.0026)
SERVICE INFORMATION 00 – 35
Service limit
4JB1 / 4JB1T /
4JG2
4JB1TC
0.4 (0.0157) or less
0.2 (0.0079)
41.65 (1.6397)
49.60 (1.9527)
0.10 (0.0039)
50.08(1.9716)
0.12 (0.0047)
12.95 (0.5098)
0.10 (0.0039)
18.90 (0.7440)
19.10 (0.7520)
0.10 (0.004)
0.2 (0.0079) or less
0.20 (0.0079) 0.15 (0.0059)
0.15 (0.0059)
0.30 (0.018)
0.11
(0.0043)
0.08 (0.0031)
69.91 (2.7524)
52.90 (2.0827)
0.08 (0.003)
0.100 (0.0039)
mm (in)
Remarks