Specifications
(10) Install power steering/air conditioning pulley.
Tighten nut to 170 N·m (125 ft. lbs.).
CAUTION: Correct torque on the crankshaft vibra-
tion damper nut is important or engine damage can
occur.
(11) Install crankshaft vibration damper. Torque to
441 N·m (325 ft. lbs.)
(12) Install both accessory drive belts. Refer to
Group 7, Cooling.
(13) Install splash shield.
(14) Lower vehicle.
(15) Connect battery.
PISTONS AND CONNECTING ROD
REMOVAL
(1) Disconnect the battery cable.
(2) Remove cylinder heads, refer to cylinder head
removal in this section.
(3) Raise vehicle on host.
(4) Remove oil pan, refer to oil pan removal in this
section.
(5) Remove top carbon ridge of cylinder bores with
a reliable ridge reamer before removing pistons from
cylinder block. Be sure to keep tops of pistons
covered during this operation . Mark piston with
matching cylinder number.
(6) Pistons and connecting rods must be removed
from top of cylinder block. Rotate crankshaft so that
each connecting rod is centered in cylinder bore.
(7) Remove connecting rod cap. Push each piston
and rod assembly out of cylinder bore.
CAUTION: During piston and rod removal. DO NOT
rotate piston and connecting rod or damage to the
oil jets extending out into the cylinder bore will
occur (Fig. 74).
NOTE: Be careful not to nick crankshaft journals.
(8) After removal, install bearing cap on the mat-
ing rod.
PISTON PIN—REMOVAL
(1) Secure connecting rod in a soft jawed vice.
(2) Remove 2 clips securing piston pin (Fig. 75).
(3) Push piston pin out of piston and connecting
rod.
PISTON RING—REMOVAL
(1) Identification (ID) mark on face of upper and
intermediate piston rings must point toward piston
crown.
(2) Using a suitable ring expander, remove upper
and intermediate piston rings (Fig. 76).
(3) Remove the upper oil ring side rail, lower oil
ring side rail and then oil ring expander from piston.
(4) Carefully clean carbon from piston crowns,
skirts and ring grooves ensuring the 4 oil holes in
the oil control ring groove are clear.
FITTING PISTON RINGS
(1) Wipe cylinder bore clean. Insert ring and push
down with piston to ensure it is square in bore. The
ring gap measurement must be made with the ring
positioning at least 12 mm (0.50 in.) from bottom of
Fig. 74 Oil Jets
Fig. 75 Piston Assembly
9 - 68 ENGINE NS/GS
REMOVAL AND INSTALLATION (Continued)