Chrysler 1998 Voyager Service Manual page 1166

9 - 116 3.3/3.8L ENGINE
REMOVAL AND INSTALLATION (Continued)
Fig. 60 Piston I.D. Notches
(6) Tap the piston down in cylinder bore, using a
hammer handle. At the same time, guide connecting
rod into position on connecting rod journal.
(7) The notch or groove on top of piston must be
pointing toward front of engine (Fig. 60).
(8) Install rod caps. Install nuts on cleaned and
oiled rod bolts and tighten nuts to 54 N·m (40 ft. lb.)
Plus 1/4 turn.
(9) Repeat procedure for each piston and rod
installation.
(10) Install cylinder heads and oil pan.
(11) Fill engine crankcase with proper oil to cor-
rect level.
(12) Connect negative cable to battery.
CRANKSHAFT
MAIN BEARINGS
Bearing caps are not interchangeable and should
be marked at removal to insure correct assembly
(Fig. 62). Upper and lower bearing halves are NOT
interchangeable. Lower main bearing halves of 1, 3
and 4 are interchangeable. Upper main bearing
halves of 1, 3 and 4 are interchangeable.
CRANKSHAFT MAIN JOURNALS
The crankshaft journals should be checked for
excessive wear, taper and scoring. (Fig. 61) Limits of
taper or out-of-round on any crankshaft journals
should be held to 0.025 mm (0.001 in.). Journal
grinding should not exceed 0.305 mm (0.012 in.)
under the standard journal diameter. Do NOT grind
thrust faces of Number 2 main bearing. Do NOT nick
crank pin or bearing fillets. After grinding, remove
rough edges from crankshaft oil holes and clean out
all passages.
CAUTION: With the nodular cast iron crankshafts
used it is important that the final paper or cloth pol-
Fig. 61 Measure Crankshaft Journal O.D.
ish after any journal regrind be in the same direc-
tion as normal rotation in the engine.
Fig. 62 Main Bearing Cap Identification
Upper and lower Number 2 bearing halves are
flanged to carry the crankshaft thrust loads and are
NOT interchangeable with any other bearing halves
in the engine (Fig. 63). All bearing cap bolts removed
during service procedures are to be cleaned and oiled
before installation. Bearing shells are available in
standard and the following undersizes: 0.025 mm
(0.001 in.) and 0.254 mm (0.010 in). Never install an
undersize bearing that will reduce clearance below
specifications.
REMOVAL
(1) Remove oil pan and identify bearing caps
before removal.
(2) Remove bearing caps one at a time. Remove
upper half of bearing by inserting Special Main Bear-
ing Tool C-3059. (Fig. 64) into the oil hole of crank-
shaft.
NS