Jeep UNIVERSAL CJ-2A - Page 35

D
L4-134 ENGINE
FIG. 35-PISTON FITTING
piston or additional honing of cylinder. Insuffici-
ent pull indicates need for fitting a larger piston.
b. Check and if necessary correct connecting rod
alignment using a connecting rod aligning fixture
(such as the one shown in Fig. 36) in accordance
with the instructions furnished with the fixture.
c. Check the piston pin fit. The piston pins are
fitted with a clearance of .0001" to .0003" [0,0025
FIG. 36-CHECKING CONNECTING ROD
ALIGNMENT
1-Feeler Gauge
2-Fixture
a 0,0076 mm.] which approximates a light thumb
push fit at room temperature. See Fig. 37. The
piston pins are ·anchored in the rods with lock
screws. Installatidn of oversize pins in this engine
is not recommended as experience has shown that
should a pin be worn sufficiently to require replace-
ment, the piston should also be replaced.
Clamp the connecting rod in a vise using jaw shields
of soft metal or two pieces of hardwood, one on
each side of the rod and positioned approximately
34
FIG. 37-PISTON PIN FITTING
3" [76 mm.] from the piston pin end. Start the
piston pin in the piston with the lock screw groove
facing down. Assemble piston to connecting
rod with piston skirt T -slot on the opposite
side from the oil spray hole, in the bearing end
of the connecting rod. See Fig. 38. Install the
2
-
FIG. 38-CONNECTING ROD AND PISTON
1-0il Spray Hole
2-Piston Skirt T -slot
3-Relative Position of Camshaft