Engine Type And Build Date Code - Jeep J-10 Series 1982 Technical & Service Manual

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Engine Type ind Build Date Coda
The engine Type and Build Date Code is located on a
plate attached to the right bank cylinder head cover (fig.
1B-101).
80003
Fig. 1B-101 Engine Type ind Build Dits Code Locatloo
The code numbers identify the year, month, and day
that the engine was built. The code letter identifies the
cubic inch displacement, number of carburetor venturi
and compression ratio.
The example code identifies a 360 CID (6 liters) engine
with 2V carburetor and 8.25:1 compression ratio built on
October 15,1981.
Engine Type and Build Date Code
Letter
Code
CID Carburetor
Compression
Ratio
N 360
2V 8.25:1
1st
Character
(Year)
2nd and 3rd
Characters
(Month)
4th
Character
(Engine Type)
Sth and 6th
Characters
(Day)
1-1981
2-1982
01 - 12
N
01 -31
EXAMPLE:
1 10 N 15
60265
Oversize or Undersize Components
It is sometimes necessary to machine all cylinder
bores 0.010-inch (0.254 mm) oversize, all crankshaft
main bearing journals 0.010-inch (0.254 mm) undersize,
all connecting rod journals 0.010-inch(0.254 mm) under
size, or all camshaft bearing bores 0.010-inch (0.254 mm)
oversize. If so, the engine has a single or double letter
code stamped adjacent to the Engine Type and Build
Date Code on the plate attached to the right bank cylin
der head cover. The code is explained in the Oversize or
Undersize Components Code chart.
ENGINES 1B-67
Oversize or Undersize Components Code
Single Letter B
cylinder bore 0.010-inch
(0.254mm) oversize
Single Letter M main bearings 0.010-tnch
(0.254mm) undersize
Single Letter F
connecting rod bearings 0.010-inch
(0.254mm) undersize
Double Letters PM
main and connecting rod bearings
0.010-inch (0.254mm) undersize
Single Letter C camshaft bearing bores 0.010-inch
(0.254mm) oversize
602S8
SHORT ENGINE ASSEMBLY (SHORT BLOCK)
A service replacement short engine assembly (short
block) may be installed whenever the original engine
block is damaged beyond feasible repair. A short engine
assembly consists of an engine block, piston and con
necting rod assemblies, crankshaft, camshaft, timing
sprockets and chain. When installing a short engine
assembly, always install a replacement oil pump pickup
tube and screen assembly.
NOTE: Short engine assemblies include a replacement
engine type and build date code plate. Remove the origi
nal plate and attach the replacement plate to right cylin
der head cover.
ENGINE MOUNTING
Installation includes transfer of required component
parts from the worn or damaged original engine. Follow
the appropriate procedures for cleaning, inspection and
tightening as outlined in this section.
Resilient rubber mounting cushions support the en
gine and transmission at three points. A cushion is lo
cated at each side on the centerline of the engine. The
rear is supported by a cushion between the transmission
extension housing and the rear support crossmember
(fig. 1B-102).
FRONT
CUSHIONS
RESTRICTOR
PLATES
Fig. 1B-102 Typical Engine Mounting