Cummins ISX11.9 CM2250 – Service Manual 001-028   Cylinder Liner

WARNING  Do not remove the pressure cap from a hot engine. Wait until the coolant temperature is below 50°C [120°F] before removing the pressure cap. Heated coolant spray or steam can cause personal injury.

WARNING  Coolant is toxic. Keep away from children and pets. If not reused, dispose of in accordance with local environmental regulations.

WARNING  To reduce the possibility of personal injury, avoid direct contact of hot engine oil with your skin.

WARNING  Some state and federal agencies have determined that used engine oil can be carcinogenic and cause reproductive toxicity. Avoid inhalation of vapors, ingestion, and prolonged contact with used engine oil. If not reused, dispose of in accordance with local environmental regulations.

WARNING  This component or assembly weighs greater than 23 kg [50 lb]. To prevent serious personal injury, be sure to have assistance or use appropriate lifting equipment to lift this component or assembly.

NOTE: Cummins Inc. does not recommend removing the cylinder liners to reduce oil consumption unless the cylinder liners are damaged and must be replaced.

• Drain the cooling system. Refer to Procedure 008-018 in Section 8.
• Remove the cylinder head. Refer to Procedure 002-004 in Section 1.
• Drain the lubricating oil. Refer to Procedure 007-037 in Section 7.
• Remove the lubricating oil pan. Refer to Procedure 007-025 in Section 7.
• Remove the piston cooling nozzles. Refer to Procedure 001-046 in Section 1.
• Remove the piston and connecting rod assemblies. Refer to Procedure 001-054 in Section 1.

Use the cylinder liner clamping tool, Part Number 3164246, or equivalent, to seat the liner in the cylinder block.

Place the force plate (3) across the top of the liner with the step inside the liner bore.

Place the installation tool bridge (1) across the liner and install the two cylinder head capscrews finger-tight to hold the bridge down.

Rotate the force plate until the areas where the protrusion measurements will be taken are exposed.

CAUTION  Do not use an impact wrench to tighten the liner force plate screw. Excessive torque will cause damage to the liner installation tool.

Tighten the forcing screw (2).

Use a depth gauge, Part Number 3164438, to measure the liner protrusion at four points that are 90 degrees apart.

Cylinder Liner Protrusion

Measure the liner bore for out-of-roundness at points “C,” “D,” “E,” “F,” and “G.” Measure each point in the direction “AA” and “BB”. The bore must not be more than 0.10 mm [0.004 in] out-of-round.

If the liner bore is more than 0.10 mm [0.004 in] out-of-round, remove the liner so the cylinder block liner bore can be measured.

The block counterbore diameters above and below the cylinder block counterbore area are not critical dimensions, and do not need to be measured.

Use a feeler gauge to measure the liner-to-block clearance at the four block casting points.

If the clearance is less than 0.25 mm [0.010 in], replace the liner.

The cylinder liners can be removed by using cylinder liner remover, Part Number 3163745, and cylinder liner remover plate, Part Number 3162462.

CAUTION  The cylinder liner puller must be installed and used as described to reduce the possibility of damage to the cylinder block. The puller plate must be parallel to the main bearing saddles and must not extend past the cylinder liner outside diameter.

Install the cylinder liner puller onto the top of the cylinder block.

The cylinder liner puller must be centered on the top of the cylinder block.

Turn the puller jackscrew clockwise to loosen the cylinder liner from the cylinder block.

Use both hands to remove the cylinder liner.

When the liner is removed from the cylinder block, use Dykem™, or equivalent, to place a mark on the camshaft side of the liner to show liner orientation.

Use Dykem™, or equivalent, to mark the cylinder number on each liner.

CAUTION  Do not use emery cloth or sandpaper to remove carbon from the cylinder liners. Aluminum oxide or silicon particles from emery cloth or sand paper can cause serious engine damage. Do not use any abrasives in the ring travel area. The cylinder liner can be damaged.

Use a soft wire brush to clean the flange seating area.

Use a fine fibrous abrasive pad such as Scotch-Brite™ 7448, or equivalent, to remove the remaining scale and rust.

WARNING  When using a steam cleaner, wear safety glasses or a face shield, as well as protective clothing. Hot steam can cause serious personal injury.

WARNING  When using solvents, acids, or alkaline materials for cleaning, follow the manufacturer’s recommendations for use. Wear goggles and protective clothing to reduce the possibility of personal injury.

WARNING  Some solvents are flammable and toxic. Read the manufacturer’s instructions before using.

WARNING  Wear appropriate eye and face protection when using compressed air. Flying debris and dirt can cause personal injury.

Use solvent or steam to clean the liners, and dry with compressed air.

Use clean 15W-40 oil to lubricate the inside diameter of the liners.

Allow the oil to soak into the liners for 5 to 10 minutes.

Use lint-free paper towels to wipe the excess oil from the inside of the cylinder liners.

Continue to lubricate the inside of the cylinder liners and wipe them clean until the paper towel shows no gray or black residue.

Inspect the liners and cylinder block for dirt or damage.

Inspect the liners for cracks on the inside and outside diameters.

If cracks are found the liner must be replaced.

Inspect for cracks under the cylinder liner flange.

Cracks can also be detected using either magnetic inspection or the dye penetrant method.

If cracks are found the liner must be replaced.

Inspect the outside circumference for excessive corrosion or pitting.

Cylinder liners with pitting generally can not be used.

However, if the pitting is light and can be removed with fine emery cloth, the cylinder liner can be used.

Cylinder Liner Pitting Depth

Inspect the inside surface for vertical scratches deep enough to be felt with a fingernail.

If a fingernail catches in the scratch, the cylinder liner must be replaced.

Inspect the inside surface for scuffing or scoring.

Inspect the inside surface for cylinder liner bore polishing.

A moderate polish (A) produces a mirror finish in the worn area with traces of the original hone marks or an indication of an etch pattern.

A heavy polish (B) produces a bright mirror finish in the worn area with no traces of hone marks or an etch pattern.

Replace the cylinder liner if:

• A heavy polish is present over 20 percent of the piston ring travel area
• 30 percent of the piston ring travel has both moderate and heavy polish and one half (15 percent) is heavy polish.

Use a dial bore gauge to measure the liner inside diameter, in four places, 90-degrees apart, at the top and bottom of the piston travel area.

Cylinder Liner Inside Diameter

Measure the cylinder block upper liner bore (A).

Cylinder Block Upper Liner Bore Inside Diameter (A)

Measure the cylinder block liner seal seat bore (B) 8.0 to 13.5 mm [0.32 to 0.53 in] below the counterbore.

Cylinder Block Liner Seal Seat Bore Inside Diameter (B)

Measure the liner outside diameter (A).

Cylinder Liner Top Press Fit Outside Diameter (A)

The cylinder block liner counterbore flange diameter is not a critical dimension and does not need to be measured.

Measure the cylinder liner seal seat outside diameter (C).

Cylinder Liner Seal Seat Outside Diameter (C)

CAUTION  The liners must be installed within 30 seconds after being lubricated with oil. If the liners are not installed within this time limit, the o-rings will swell and be damaged when the liner is installed.

Make sure the cylinder block and all parts are clean before assembly.

Use clean vegetable oil to coat the liner o-ring seals.

Install the o-ring seal on the liner. Make sure the o-ring seal does not roll during installation.

Install the liner into the cylinder block.

When acceptable used liners are installed, rotate the liners 90 degrees from their original position in the engine. Original thrust and anti-thrust surfaces must face the front and back of the cylinder block.

Use cylinder liner driver, Part Number 3164246, or equivalent, to drive the liner into the cylinder block bore.

If the liner does not seat properly, remove the liner. Inspect the counterbore seat and liner for nicks, burrs, and dirt.

Install the liner again.

The cylinder liner protrusion must be checked before installing the pistons and connecting rods.

Use a depth gauge, Part Number 3164438, to measure the liner protrusion at four points that are 90 degrees apart.

Cylinder Liner Protrusion

WARNING  This component or assembly weighs greater than 23 kg [50 lb]. To prevent serious personal injury, be sure to have assistance or use appropriate lifting equipment to lift this component or assembly.

WARNING  Coolant is toxic. Keep away from children and pets. If not reused, dispose of in accordance with local environmental regulations.

WARNING  Some state and federal agencies have determined that used engine oil can be carcinogenic and cause reproductive toxicity. Avoid inhalation of vapors, ingestion, and prolonged contact with used engine oil. If not reused, dispose of in accordance with local environmental regulations.

• Install the piston and connecting rod assemblies. Refer to Procedure 001-054 in Section 1.
• Install the piston cooling nozzles. Refer to Procedure 001-046 in Section 1.
• Install the lubricating oil pan. Refer to Procedure 007-025 in Section 7.
• Install the cylinder head. Refer to Procedure 002-004 in Section 2.
• Fill the engine with lubricating oil. Refer to Procedure 007-037 in Section 7.
• Fill the cooling system. Refer to Procedure 008-018 in Section 8.
• Operate the engine and check for proper operation and leaks.