Chrysler 300M, Dodge Interpid. Manual — part 252

REMOVAL

(1) Remove piston and connecting rod. (Refer to 9 -

ENGINE/ENGINE BLOCK/PISTON & CONNECT-
ING ROD - REMOVAL)

(2) Remove No. 1 and No.2 piston rings from pis-

ton using a ring expander tool (Fig. 92).

(3) Remove upper oil ring side rail (Fig. 90).
(4) Remove lower oil ring side rail (Fig. 90).
(5) Remove oil ring expander (Fig. 90).

INSTALLATION

(1) Measure clearance of piston rings to the cylin-

der bore and piston. (Refer to 9 - ENGINE/ENGINE
BLOCK/PISTON

RINGS

-

STANDARD

PROCE-

DURE)

The No. 1 and No. 2 piston rings have a different

cross section. Insure that the No. 2 ring is installed
with manufacturers I.D. mark (dot) facing up,
towards top of the piston (Fig. 90).

CAUTION: Install piston rings in the following
order:

• Oil ring expander.

• Upper oil ring side rail.

• Lower oil ring side rail.

• No. 2 Intermediate piston ring.

• No. 1 Upper piston ring.
(2) Install oil ring expander.

(3) 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. 91).

Fig. 89 Measuring Piston Ring Side Clearance

1 - FEELER GAUGE

Fig. 90 PISTON RING - INSTALLATION

1 - SIDE RAIL
2 - SPACER EXPANDER

Fig. 91 SIDE RAIL - INSTALLATION

1 - SIDE RAIL END

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ENGINE

9 - 55

PISTON RINGS (Continued)

(4) Install upper side rail first and then the lower

side rail.

The No. 1 and No. 2 piston rings have a different

cross section. Insure that the No. 2 ring is installed
with manufacturers I.D. mark (dot) facing up,
towards top of the piston (Fig. 90).

(5) Install No. 2 piston ring and then No. 1 piston

ring (Fig. 92).

(6) Position piston ring end gaps as shown in (Fig.

93).

(7) Position oil ring expander gap at least 45° from

the side rail gaps but not on the piston pin center or
on the thrust direction. Staggering ring gap is impor-
tant for oil control.

STRUCTURAL COLLAR /
COVER

REMOVAL

(1) Raise vehicle on hoist.
(2) Remove bolts attaching structural collar to oil

pan and transmission housing (Fig. 94).

(3) Remove collar (Fig. 94).

INSTALLATION

CAUTION: The collar must be tighten using this ser-
vice procedure, as damage to collar and/or oil pan
may occur.

(1) Install structural collar (Fig. 94) using the fol-

lowing tightening sequence:

a.

Install the vertical collar to oil pan bolts.

Torque bolts initially to 1.1 N·m (10 in. lbs.).

b.

Install the horizontal collar to transmission

bolts and torque to 55 N·m (40 ft. lbs.).

c.

Starting with the center vertical bolts and

working outward, final torque bolts to 55 N·m (40 ft.
lbs.).

(2) Lower vehicle.

VIBRATION DAMPER

REMOVAL

(1) Disconnect negative cable at right strut tower.
(2) Remove upper radiator crossmember. (Refer to

23 - BODY/EXTERIOR/GRILLE OPENING REIN-
FORCEMENT - REMOVAL)

(3) Remove radiator fan. (Refer to 7 - COOLING/

ENGINE/RADIATOR FAN - REMOVAL)

Fig. 92 UPPER AND INTERMEDIATE RINGS

Fig. 93 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. 94 Structural Collar

1 - BOLT-HORIZONTAL
2 - BOLT-VERTICAL
3 - STRUCTURAL COLLAR

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ENGINE

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PISTON RINGS (Continued)

(4) Remove the accessory drive belts. (Refer to 7 -

COOLING/ACCESSORY

DRIVE/DRIVE

BELTS

-

REMOVAL)

(5) Use Special Tool 8191 to hold crankshaft

damper while removing center bolt (Fig. 95).

(6) Use

Special

Tool

1023

puller,

and

insert

C-4685-C2, remove crankshaft damper (Fig. 96).

INSTALLATION

(1) Install crankshaft damper using Special Tools

C-4685-C1 (5.9 in.) Bolt, with Nut and Thrust Bear-

ing from 6792, and 6792-1 Installer (Fig. 97). Install
center bolt and tighten to 115 N·m (85 ft. lbs.) (Fig.
95).

(2) Install accessory drive belts. (Refer to 7 -

COOLING/ACCESSORY

DRIVE/DRIVE

BELTS

-

INSTALLATION)

(3) Install radiator fan. (Refer to 7 - COOLING/

ENGINE/RADIATOR FAN - INSTALLATION)

(4) Install upper radiator crossmember. (Refer to

23 - BODY/EXTERIOR/GRILLE OPENING REIN-
FORCEMENT - INSTALLATION)

(5) Connect negative cable.

ENGINE MOUNTING

DESCRIPTION

The engine mounting system consist of three

mounts; two hydro-type mounts are attached to the
right and left side of the engine block, and one
molded rubber type rear mount is attached to the
transaxle (Fig. 99). All three mounts attach to the
suspension crossmember/engine cradle.

The engine hydro-type mounts contain a liquid

that is encased in a solid rubber housing.

Fig. 95 Crankshaft Damper Center Bolt - Removal

and Installation

1 - SPECIAL TOOL 8191
2 - CRANKSHAFT DAMPER

Fig. 96 CRANKSHAFT DAMPER - REMOVAL

1 - SPECIAL TOOL
1023
2 - SPECIAL TOOL
C-4685–C2
INSERT

Fig. 97 CRANKSHAFT DAMPER - INSTALLATION

1 - SPECIAL TOOL
6792–1
2 - SPECIAL TOOL
C-4685–C1

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ENGINE

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VIBRATION DAMPER (Continued)

INSPECTION

Engine hydro-mounts may show surface cracks.

This will not effect performance and mount should
not be replaced. Only replace the engine hydro-
mounts when leaking fluid.

LEFT MOUNT

REMOVAL

(1) Raise vehicle on hoist.
(2) Remove the isolator attaching nuts from top of

the mounting bracket (Fig. 98).

(3) Support the engine with a jack and a block of

wood across the full width of the oil pan.

(4) Remove the lower attaching nuts from the bot-

tom of the isolator to the frame (Fig. 98).

(5) Raise engine carefully with jack enough to

remove the isolator with heat shield from its mount.

INSTALLATION

(1) Install isolator mount with heat shield onto the

frame.

(2) Lower the engine onto the isolator mount.
(3) Remove jack from vehicle.
(4) Tighten the isolator to frame nuts to 61 N·m

(45 ft. lbs.) (Fig. 98).

(5) Install the upper attaching nuts to mount and

tighten to 61 N·m (45 ft. lbs.) (Fig. 98).

(6) Lower vehicle.

Fig. 98 ENGINE MOUNTING

1 - NUT

6 - HEAT SHIELD

2 - REAR ISOLATOR

7 - BOLT

3 - BOLT

8 - ENGINE MOUNT BRACKET

4 - NUT

9 - NUT

5 - ISOLATOR

9 - 58

ENGINE

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ENGINE MOUNTING (Continued)