I. Introduction – General Engine Family Information
U L-Series Diesel 4
L-Series Engines
Below is a brief description of the application/development criteria and design characteristics of the
L engine family:
Clean
• Individual Zexel
injection pumps w/short high pressure fuel injection pipes to reduce
volumetric loss and minimize injection delay common at high speeds.
• Ricardo Commet-V type combustion chamber
• Steel laminated head gasket and liquid gasket for other sealing surfaces means no more asbestos
• Blow-by gases recirculated into intake with use of PCV valve
Quiet
• Single OHV cam that drives injectors, intake and exhaust valves (less gear driven components)
• Large mesh area on gear driven components
• Auto-thermatic pistons that reduce engine noise at start up and after warm up.
Small size
• Overhead valve to reduce engine height
• Full siamese engine block design reduces length
Ease of Maintenance
• All service points of engine are placed on the same side
(oil fill, dipstick, filter, injection pumps, nozzles and glow plugs).
• Electric fuel pump purges air automatically
Identification
The production date for any Isuzu engine can be obtained be reading the letter codes on the ID tag
(usually located on the head cover) and using the table below.
A B C D E F G H I J
0 1 2 3 4 5 6 7 8 9
Example: BA/JB=10/91 (Engine produced October, 1991).
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