Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1677
CONNECTING RODS
CAUTION: Connecting rods must be replaced once
the end caps are loosened. All six must have the
same weight and the same number. Replacement
connecting rods will only be supplied in sets of
six. When assembling the connecting rod, be sure
to paint mark or scribe mark each of the connect-
ing rods and caps before installation, for align-
ment purposes later.
NOTE: Do Not lubricate the new connecting rod
bolts. They are already coated with a anti scuff
treatment.
Connecting rods are supplied in sets of six since they
all must be of the same weight category. Max allow-
able weight difference is 5 gr.
1. Assemble bearing shells and bearing caps to their
respective connecting rods ensuring that the serra-
tions on the cap and reference marks are aligned.
2. Tighten connecting cap bolts to 20 N·m (15 ft. lbs.).
3. Without loosening connecting rod bolts, tighten all
bolts to 40 N·m (30 ft.lbs.).
4. Using a torque angle gauge, tighten each bolt an additional 90°.
INSTALLATION
PISTON PIN INSTALLATION
1. Secure connecting rod in soft jawed vice.
2. Lubricate piston pin and piston with clean engine oil.
3. Position piston on connecting rod.
CAUTION: Ensure arrow on piston crown and the bearing cap numbers on the connecting rod are on the
opposite side.
4. Install piston pin.
5. Install clips in piston to retain piston pin.
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6. Remove connecting rod from vice.
PISTON RINGS - INSTALLATION
1. Install rings on the pistons using a suitable ring
expander.
2. Top compression ring is tapered and chromium
plated. The second ring is of the scraper type and
must be installed with scraping edge facing bottom
of the piston. The third is an oil control ring. Ring
gaps must be positioned, before inserting piston
into the liners, as follows.
3. Top ring gap must be positioned at the #3 position
(looking at the piston crown from above).
4. Second piston ring gap should be positioned at the
#1 position.
5. Oil control ring gap should be positioned at the #2
position.
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6. When assembling pistons check that components are installed in the same position as before disassembly,
determined by the numbers stamped on the crown of individual pistons. Engine cylinders are numbered starting
from gear train end of the engine. Face arrow on top of piston toward front of engine. Therefore, the num-
bers stamped on connecting rod big end should face toward the injection pump side of engine. To insert piston
into cylinder use a ring compressor.
INSTALLATION
1. Before
installing
pistons,
and
connecting
rod
assemblies into the bore, be sure 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 together.
3. Immerse the piston head and rings in clean engine
oil, slide the piston ring compressor, over the piston
and tighten. Ensure position of rings does not
change during this operation.
4. Face arrow on piston towards front of engine.
CAUTION: Care must be taken not to nick crank-
shaft journal when installing pistons.
5. Rotate crankshaft so that the connecting rod jour-
nal is on the center of the cylinder bore. Insert rod
and piston into cylinder bore and guide rod over
the crankshaft journal.
6. Guide the piston down in cylinder bore, using a
hammer handle. At the same time, guide connect-
ing rod into position on connecting rod journal.
7. Install connecting rod caps. Install rod bolts and torque to 10N·m (88 lbs. in.). Torque bolts the next stage to
30N·m (22 ft.lb.) plus 60°. Then with a torque wrench set at torque to 88N·m (65 ft.lb), make a tightening check.
8. Install cylinder head (Refer to 9 - ENGINE/CYLINDER HEAD - INSTALLATION).
9. Install balance shaft assembly (Refer to 9 - ENGINE/VALVE TIMING/BALANCE SHAFT - INSTALLATION).
10. Install oil pump pickup tube (Refer to 9 - ENGINE/LUBRICATION/OIL PUMP - INSTALLATION).
11. Install oil pan (Refer to 9 - ENGINE/LUBRICATION/OIL PAN - INSTALLATION).
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12. Connect negative battery cable.
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