Engine International HS 2.8L. Manual - part 15

International HS 2.8L

Pistons and Connecting Rods

6 9

8120081 - 05/02 - Service Manual

INTERNATIONAL ENGINES

PISTONS AND CONNECTING
RODS

Removal

1.

Remove cylinder head.

2.

Remove oil pan, suction and lubricant oil flux
pipes.

3.

Position the block in the horizontal position.

4.

Before removing piston, remove carbon
deposits accumulated on liner top.
Horizontally position cylinders and cylinder
piston to be cleaned at BDC. Fill with a cloth
the space above of the top of the piston.
Remove carbon with a brush or sandpaper
and clean the area with a cloth.

4.

Remove pistons.

Disassembly

1.

Remove the piston rings.

2.

Remove snap rings and manually remove
piston pin. If it is difficult to remove pin, heat
the piston in water or oil up to 80 °C (176 °F).

3.

Remove connecting rod bushing.

International HS 2.8L

Pistons and Connecting Rods

7 0

INTERNATIONAL ENGINES

Cleaning and inspection

1.

Check if the pistons have risks or damages
in lateral and upper faces. Carefully remove
carbon residues from the grooves.

2.

Assembly a new ring and check its clearance
in the groove. If it is over than indicated next,
piston must be replaced.

Lateral clearance

Millimeters

Ring of the 1st groove,

compression

0.050

0.090

Ring of the 2nd groove,

compression

0.050

0.090

Ring of the 3rd groove,

compression

0.030

0.065

3.

Measure piston pin outer diameter with
micrometer.

4.

Measure piston pin housing with bore gauge.
The measurements must be taken in the
horizontal, vertical and diagonal direction in
relation to the hole that houses the pin.

5.

Check connecting rod warping and
alignment.

International HS 2.8L

Pistons and Connecting Rods

7 1

8120081 - 05/02 - Service Manual

INTERNATIONAL ENGINES

7.

Connecting rod and cap have serial number
on one of its side. When assembling cap,
check if its serial number corresponds to the
connecting rod number.

6.

In case of any irregularity, replace the part
and make a new position number
demarcation of the connecting rod in the
engine block. Example of connecting rod that
will work in the first cylinder, marked with
electric pencil.

8.

On one of the sides, connecting rod has the
code of weight, that goes from,
approximately, 1259 to 1322 grams and it is
identified only by the two last weight digits, by
an ink mark on the body of the connecting
rod.

Note:

In the four kits assembly (piston, connecting rod and rings), the variation of the set can
be of, at maximum, 5.5 g.

9.

Measure bushing and shell housings in the
horizontal, vertical and diagonal positions.
When measuring shells housing, correctly
position connecting rod cap, tightening
according specification.

International HS 2.8L

Pistons and Connecting Rods

7 2

INTERNATIONAL ENGINES

10. Check clearance between piston rings ends

in cylinder. Clearance must be checked
separately. Use piston to introduce the ring
between 40 and 50 mm below block surface.
Cylinder bore must be within specified
measures. See the correct clearance
between ends below.

Clearance between

ends

Millimeters

0.400

0.600

1st groove,

compression ring

2nd groove,

compression ring

0.300

0.550

3rd groove,

oil ring

0.300

0.550

Assembly:

1.

To assembly, all parts must be cleaned.
Assembly bushing in connecting rod, making
sure that lubrication holes are aligned.
Machine bushing inner diameter.

2.

Assembly piston in connecting rod, with
combustion chamber turned to the same
side of the shell lock. Manually install pin and
snap rings. If it is difficult to assembly the pin,
heat the piston in water or oil at 80 °C (176
°F). The piston must be carefully handled,
because any damage on its surfaces may
cause bad engine operation. Assembly
connecting rod and piston in the same
cylinder whether they have not been
replaced.