Compression Ring Installation; Typical Piston Ring Markings; Piston Pin Removal Or Installation - Jeep J-10 Series 1982 Technical & Service Manual

1B-56 ENGINES
RING EXPANDER
RECOMMENDED
Fig. 1B-88 Compression Ring Installation
NOTE: Ensure upper and lower compression rings are
installed properly. Ideally, ring gaps should be located
180 degrees apart. Figure lB-89 depicts typical ring
markings that indicate the top side of each ring.
(3) Install upper compression ring using ring in
staller to expand ring around piston (fig. 1B-88). Posi
tion ring gap 180° from lower compression ring.
41913
Fig. 1B-89 Typical Piston Ring Markings
Piston Pins
Piston pins are press fit into the connecting rod and
require no locking device.
Removal
(1) Using Piston Pin Remover Tool J-21872 and ar
bor press, place piston on Remover Support Tool J-
21872-1 (fig. 1B-90).
(2) Use Piloted Driver Tool J-21872-3 to press pin
completely out of piston. Note position of pin through
gauge window of remover support.
Pin Inspection
(1) Inspect pin and pin bore for nicks and burrs.
Remove as necessary.
NOTE: Never reuse piston pin after it has been in
stalled in and removed from a connecting rod.
(2) With pin removed from piston, clean and dry
piston pin bore and replacement piston pin.
UJ
H V J-21872-3
J-21872-1
J-21872-3
U
J-21872-2 n
J-21872-1 J^A
80048
Fig. 1B-90 Piston Pin Removal or Installation
(3) Position piston so that pin bore is in vertical
position. Insert pin in bore. At room temperature, the
replacement pin should slide completely through pin
bore without using force.
(4) Replace piston if pin jams in pin bore.
Installation
(1) Insert Pin Pilot Tool J-21872-2 through piston
and connecting rod pin bores (fig. 1B-90).
(2) Position pin pilot, piston and connecting rod on
Support Tool J-21872-1.
(3) Insert piston pin through upper piston pin bore
and into connecting rod pin bore.
(4) Position Piloted Driver Tool J-21872-3 inside pis
ton pin.
(5) Use arbor press to press piston pin through con
necting rod and piston until pin pilot indexes with mark
on support.
NOTE: The piston pin requires a 2,000 pound (8.9 kN)
press-fit. If little effort is required to install piston pin
in connecting rod, or if rod moves along pin, replace
connecting rod.
(6) Remove piston and connecting rod assembly
from press. Pin should be centered in rod, ±0.0312 inch
(0.792 mm).
CRANKSHAFT
The nodular iron crankshaft is counterweighted and
balanced. The crankshaft has four counterweights,
seven main bearing journals and six connecting rod jour
nals. End thrust is controlled by the No. 3 main bearing.