Four-Cylinder Engine Component Codes; Inline Six-Cylinder Engine Component Codes - Jeep cherokee 1989 Owner's Manual

2D-16
5 Next, measure each cylinder's diameter at the same three locations
across the crankshaft axis. Compare the results to the specifications.
If the required precision measuring tools aren't available, the piston-
6
to-cylinder clearances can be obtained, though not quite as accurately,
using feeler gauge stock. Feeler gauge stock comes in 12-inch lengths
and various thicknesses and is generally available at auto parts stores.
determine the bore size
CODE
are stamped on the boss
and distributor (D)
The Motor Manual Guy
Chapter 2 Part D General engine overhaul procedures
COMPONENT
One or more connecting rod bearing journals
All crankshaft main bearing journals
connecting rod journals
All cylinder bores
All camshaft bearing bores
between the ignition coil (C)
7 To check the clearance, select a feeler gauge and slip it into the
cylinder along with the matching piston. The piston must be positioned
exactly as it normally would be. The feeler gauge must be between
the piston and cylinder on one of the thrust faces
pin bore).
8 The piston should slip through the cylinder (with the feeler gauge
BOSS
cylinder en g ines is located on the oil filter boss
between the fuel pump and distributor
Definition
Letter
B
All cylinder bores
M
All crankshaft main bearing
journals
I
P
All connecting rod bearing
journals
PM
The code letters
earing journals and connecting rod journals are 0.010-mch
to the piston
LETTER
CODE
0.01 0-inch
(0.254 mm) oversize
I I
0.01 0-inch
(0.254 mm) undersize
I
0.01 0-inch
(0.254 mm) undersize
mean that the crankshaft ?lain