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Mitsubishi Eclipse. Manual - part 884

PISTON AND CONNECTING ROD

TSB Revision

ENGINE OVERHAUL <3.0L>

11D-45

REMOVAL SERVICE POINTS

<<A>> CONNECTING ROD CAP REMOVAL
1. Mark the cylinder number on the side of the connecting rod

big end for correct reassembly.

2. Keep the removed connecting rods, caps, and bearings in

order according to the cylinder number.

<<B>> PISTON PIN REMOVAL

AKX00734

CYLINDER
NUMBER

ITEM
NO.

PART NO.

DESCRIPTION

MIT310134

Base

MIT310136

Piston support

MIT310137

Connecting rod guide pin

MIT310138

Connecting rod guide pin

MIT310139

Connecting rod guide pin

MIT310140

Piston support

MIT310141

Connecting rod guide pin

MIT310142

Piston support

MIT48143

Press pin

216943

Stop screw

10396

Nut

AKX00730

PISTON PIN SETTING TOOL MIT216941

PISTON AND CONNECTING ROD

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ENGINE OVERHAUL <3.0L>

11D-46

1. Remove the stop screw from the base.
2. Select the correct piston support for your application. (See

above) Fit the piston support onto the base. Place the base
on the press support blocks.

3. Insert the press pin through the piston pin hole. Select the

correct connecting rod guide pin. (See above.) Thread the
guide pin onto the threaded portion of the press pin.

4. Position the piston assembly on the piston support in the

press. With the press pin up as shown, insert the guide pin
through the hole in the piston and through the hole in the
piston support.

CAUTION

To avoid piston damage, the piston support must seat
squarely against the piston. Verify that the piston pin will
slide through the hole in the piston support.
5. Press the piston pin out of the assembly.
6. Remove the piston pin from the piston pin.

INSTALLATION SERVICE POINTS

>>A<< PISTON PIN INSTALLATION
1. Thread the stop screw and jam nut assembly into the base.

Fit the correct piston support on top of the base. Insert the
press pin, threaded end up, into the hole in the piston
support until the press pin touches the stop screw.

2. Using the graduations on the press pin, adjust the stop

screw to the depth.

Depth: 60 mm (2.36 inches)

AKX00645

BASE

PRESS
PIN

PISTON
PIN

FRONT
MARK

FRONT MARK

CONNECTING
ROD
GUIDE PIN

AKX00732

PRESS
PIN

PISTON
SUPPORT

STOP
SCREW

PIN DEPTH SET
LOCATION

FLAT PISTON
SUPPORT

JAM
NUT

BASE

PISTON AND CONNECTING ROD

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ENGINE OVERHAUL <3.0L>

11D-47

3. Place the base on the press support blocks.
4. Slide the piston pin over the threaded end of the press pin,

and thread the correct guide pin up against it.

5. Coat the piston pin with engine oil, and with the connecting

rod held in position, slide the guide pin through the piston
and connecting rod.

6. Press the piston pin through the connecting rod until the

guide pin contacts the stop screw.

CAUTION

Due to production tolerance variations, it is necessary to
visually inspect the piston pin depth after installation to
verify that the piston pin is centered. Adjust if necessary.
7. Remove the piston assembly from the base. Remove the

guide pin and press pin from the assembly.

8. Check that the piston moves smoothly.

>>B<<OIL RING INSTALLATION
1. Fit the oil ring spacer into the piston ring groove.

NOTE: The side rails and spacer may be installed in either
direction.
NOTE: New spacers and side rails are colored for identifica-
tion of their sizes.

AKX00646

JAM NUT

PRESS
PIN

PISTON PIN

FRONT
MARK

CONNECTING
ROD GUIDE
PIN

BASE

STOP
SCREW

AKX00716

SIZE

IDENTIFICATION COLOR

Standard

None

0.50 mm (0.020 in) oversize
diameter

Blue

1.00 mm (0.040 in) oversize
diameter

Yellow

AK000196AB

SIDE RAIL

SPACER

PISTON AND CONNECTING ROD

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ENGINE OVERHAUL <3.0L>

11D-48

CAUTION

Do not use any piston ring expander when installing the
side rail.
2. Install the upper side rail.

To install the side rail, first fit one end of the rail into the
piston groove, then press the remaining portion into the
position by finger. See illustration.

3. Install the lower side rail in the same procedure as described

in step 2.

4. Make sure that the side rails move smoothly in either

direction.

>>C<< PISTON RING NO.2/PISTON RING NO.1
INSTALLATION
1. To prevent wrong installation, check the identification mark

of each piston ring. The identification mark is stamped near
the ring gap:

Identification mark

Number 1 ring: T
Number 2 ring: 2T

NOTE: Size marks on piston rings are as follows.

2. Using a piston ring expander, fit the number 2 piston ring

into the number 2 groove of piston.
NOTE: Install the piston rings with their identification mark
facing up, to the piston crown side.

3. Install the number 1 piston ring in the same manner as step

>>D<< PISTON AND CONNECTING ROD INSTALLATION
1. Apply engine oil on the circumference of the piston, piston

rings, and oil ring.

2. Arrange the piston ring and oil ring gaps (side rail and

spacer) as shown in the illustration.

3. Rotate the crankshaft so that the crank pin is on the center

of the cylinder bore.

AKX00608

SIDE RAIL END

SIZE

IDENTIFICATION MARK

Standard

None

0.50 mm (0.020 in) oversize
diameter

1.00 mm (0.040 in) oversize
diameter

100

AKX00689

NO.1

NO.2

IDENTIFICATION
MARK

SIZE MARK

IDENTIFICATION MARK

AKX00633

AKX00620

UPPER
SIDE RAIL

NO.1

PISTON PIN

TIMING
BELT SIDE

LOWER
SIDE RAIL

NO.2 RING GAP
AND SPACER GAP

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