(10) Position piston ring end gaps as shown in
(Fig. 100).
(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 AND CONNECTING ROD—INSTALLATION
(1) Before installing piston 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.
(2) Before installing the ring compressor, make
sure the oil ring expander ends are butted and the
rail gaps located as shown in (Fig. 100).
(3) Immerse the piston head and rings in clean
engine oil, slide the ring compressor over the piston
and tighten with the special wrench. Ensure posi-
tion of rings does not change during this oper-
ation.
CAUTION: Ensure the hole in bearing half aligns
with hole in connecting rod, as damage to engine
may occur.
(4) Position bearing onto connecting rod. Ensure
that hole in bearing half is aligned to hole in con-
necting rod. Lubricate bearing surface with clean
engine oil.
(5) Install Special Tools 8189 Connecting Rod
Guides into connecting rod (Fig. 96).
(6) The pistons are marked on top with an arrow
and with an “F” (Front) above the pin boss. These
marks must be pointing toward the front of engine
on both cylinder banks. The connecting rod oil squirt
hole faces the major thrust (right) side of the block
(Fig. 102).
Fig. 99 Upper and Intermediate Rings—Installation
Fig. 100 Piston Ring End Gap Position
1 – SIDE RAIL UPPER
2 – NO. 1 RING GAP
3 – PISTON PIN
4 – SIDE RAIL LOWER
5 – NO. 2 RING GAP AND SPACER EXPANDER GAP
Fig. 101 Piston and Connecting Rod—Installation
1 – “F” TOWARD FRONT OF ENGINE
2 – RING COMPRESSOR
3 – SPECIAL TOOL 8189
4 – OIL SQUIRT HOLE
9 - 60 2.7L ENGINE LH
REMOVAL AND INSTALLATION (Continued)
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