(1) The No. 1 and No. 2 piston rings have a differ-
ent cross section. Insure that the No. 2 ring is
installed with manufacturers I.D. mark (dot) facing
up, towards top of the piston (Fig. 121).
CAUTION: Install piston rings in the following
order:
(2) Oil ring expander.
(3) Upper oil ring side rail.
(4) Lower oil ring side rail.
(5) No. 2 Intermediate piston ring.
(6) No. 1 Upper piston ring.
(7) Install the side rail by placing one end between
the piston ring groove and the expander. Hold end
firmly and press down the portion to be installed
until side rail is in position. Do not use a piston
ring expander during this step (Fig. 122).
(8) Install upper side rail first and then the lower
side rail.
(9) Install No. 2 piston ring and then No. 1 piston
ring (Fig. 123).
(10) Position piston ring end gaps as shown in
(Fig. 124).
(11) Position oil ring expander gap at least 45°
from the side rail gaps but not on the piston pin cen-
ter or on the thrust direction. Staggering ring gap is
important for oil control.
PISTON—INSTALLATION
NOTE: The connecting rod bearing cap bolts must
be examined before reuse. If the threads are necked
down, the bolts should be replaced.
(1) Check connecting rod bolts for necking by hold-
ing a scale or straight edge against the threads. If all
threads do not contact the scale, the bolt should be
replaced (Fig. 125).
(2) Before installing pistons and connecting rod
assemblies into the bore, ensure that compression
ring gaps are staggered so that neither is in line with
oil ring rail gap (Fig. 124).
(3) Before installing the ring compressor, make
sure the oil ring expander ends are butted and the
rail gaps located as shown in (Fig. 126).
Fig. 121 Piston Ring—Installation
1 – SIDE RAIL
2 – SPACER EXPANDER
Fig. 122 Side Rail—Installation
1 – SIDE RAIL END
Fig. 123 Upper and Intermediate Rings—Installation
9 - 134 3.2/3.5L ENGINE LH
REMOVAL AND INSTALLATION (Continued)
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