V. Engine Repair Specifications – 4L
U
L-Series Diesel 33
Mechanical Specifications
Cylinder Head/ Valve Train
Standard
Service Limit
Valve Clearance
¬
0.40 mm/ 0.01575 in
------------------------------------
Cylinder Head Warpage
-
0.075 mm/ 0.0029 in
0.15 mm/ 0.0059 in
Cylinder Head Height
®
63.9 mm/ 2.515 in
64.1 mm/ 2.523 in
Valve Depression
¯
0.7 mm/ 0.0276 in
1.2 mm/ 0.0427 in
Hot Plug Depression
0.05 mm/ 0.002 in
0.05 mm/ 0.002 in
Valve Margin Thickness
°
1.0 mm/03937 in
.7 mm/.0276 in
Valve Stem Diameter
7.0 mm/ .2756 in (Int.)
7.0 mm/ .2756 in (Exh.)
6.85 mm/ .2697 (Int.)
6.80 mm/ .2677 (Int.)
Valve Spring Installed Height
29.9 mm
-------------------------------------
Valve Seat Angle
45
°
¬
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
Standard
Service Limit
Main Bearing Bore Diameter
55.98 mm/ 2.2039 in
56.0 mm/ 2.2047in
Cylinder Block Height
4LB1
4LC1/4LD1
280.94 mm/ 11.060 in
307.94 mm/ 12.123 in
281.06 mm/ 11.065 in
308.06 mm/ 12.128 in
Main Bearing Journal Diameter
4LB1/4LC1
4LD1
56.0 mm/ 2.2047 in
60.0 mm/ 2.3622 in
55.86 mm/ 2.1992 in
59.86 mm/ 2.3567 in
Crank Pin Diameter
4LB1
4LC1
4LE1
43.0 mm/ 1.6929 in
46.0 mm/ 1.8110 in
49.0 mm/ 1.9291 in
42.87 mm/ 1.6878 in
45.87 mm/ 1.8059 in
48.87 mm/ 1.9240 in
Piston Protrusion
.400 mm/ .0158 in
--------------------------------
Piston to Cylinder Clearance
0.015-.035 mm/ 0.0006-.0014 in
Main Bearing Clearance
0.029-0.072 mm/ 0.0011-
0.0028 in
.0127 mm/ 0.005in
Connecting Rod Bearing Clearance
0.035 mm-0.073 mm/
0.0014-0.0029 in
0.10 mm/ 0.0039 in
Crank Gear/ Idler Gear Backlash
0.04 mm/ 0.0017 in
0.2 mm/ 0.0079 in
Cam Gear/ Idler Backlash
0.03 mm/ 0.0012 in
0.2 mm/ 0.0079 in
Crankshaft End Play
0.058-.208 mm
(0.0023-0.0082 in)
0.30 mm/ 0.0118 in
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