Isuzu L Series Manual page 30

IV. Engine Repair Specifications – 3L
Mechanical Specifications
Cylinder Head/ Valve Train
Valve Clearance¬
Cylinder head Warpage-
Cylinder Head Height ®
Valve Depression ¯
Hot Plug Depression
Valve Margin Thickness °
Valve Stem Diameter
Valve Spring Installed Height
Valve Seat Angle
¬
Valve adjustment clearances are established cold.
-
Maximum grinding allowance is 0.3 mm/ 0.0118 in
®
Measurement is established by measuring from the head's sealing surface to the rocker bracket
surface area.
¯
Dimension taken from the cylinder head surface to the top of the valves
°
Specification is for both intake and exhaust valves.
Short Block Specifications
Main Bearing Bore Diameter
Cylinder Block Height
3LA1/LB1
Main Bearing Journal Diameter
3LA1/LB1
Crank Pin Diameter
3LA1/LB1
Connecting Rod Big End Diameter
3LA1/LB1
Piston Protrusion
Piston to Cylinder Clearance
Main Bearing Clearance
Connecting Rod Bearing Clearance
Crank Gear/ Idler Gear Backlash
Cam Gear/ Idler Backlash
Crankshaft End Play
U
7.0 mm/ .2756 in (Int.)
7.0 mm/ .2756 in (Exh.)
3LD1
3LD1
3LD1
3LD1
L-Series Diesel
Standard
0.40 mm/ 0.01575 in
0.075 mm/ 0.0029 in
64.0 mm/ 2.5197 in
0.7 mm/ 0.0276 in
0.05 mm/ 0.002 in
1.0 mm/03937 in
29.9 mm
Standard
55.98 mm/ 2.2039 in
281 mm/ 11.0630 in
308 mm/ 12.1260 in
52.0 mm/ 2.0472 in
60.0 mm/ 2.3622 in
43.0 mm/ 1.6929 in
49.0 mm/ 1.9291 in
46 mm/ 1.8110 in
52 mm/ 2.0472 in
.400 mm/ .0158 in
0.015-.035 mm/ 0.0006-.0014 in
0.029-0.072 mm/ 0.0011-
0.0028 in
0.035 mm-0.073 mm/
0.0014-0.0029 in
0.07 mm/ 0.0028 in
0.06 mm/ 0.0024 in
0.06-.26 mm
(0.0024-0.0102 in)
Service Limit
0.025 mm/ 0.010 in
0.15 mm/ 0.0059 in
63.7 mm/ 2.5079 in
1.2 mm/ 0.0427 in
0.05 mm/ 0.002 in
.7 mm/.0276 in
6.85 mm/ .2697 (Int.)
6.80 mm/ .2677 (Int.)
-------------------------------------
45°
Service Limit
56.0 mm/ 2.2047in
280.7 mm/ 11.0512 in
307.7 mm/ 12.1142 in
51.86 mm/ 2.0417 in
59.86 mm/ 2.3567 in
42.87 mm/ 1.6878 in
48.87 mm/ 1.9240 in
--------------------------------
--------------------------------
.0127 mm/ 0.005in
0.12 mm/ 0.0047 in
0.2 mm/ 0.0079 in
0.2 mm/ 0.0079 in
0.30 mm/ 0.0118 in
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