The cylinder liner is of the replaceable wet type, made of hardened alloy cast iron, and is slip fit in the cylinder block. See Figure 20210 .
1. Crevice Seal
4. D-ring Grooves
2. Crevice Seal Groove
5. D-ring Seals
3. Cylinder Liner
Cylinder Liner and Related Parts
Coolant in the cylinder block water jacket surrounds the liner and cools it directly. A cooling channel is also cut into the liner immediately below the flange. Coolant flow through this channel and around the rest of the liner controls critical ring and liner temperatures for long cylinder component life.
The liner is inserted in the cylinder bore from the top of the cylinder block. The flange at the top of the liner fits into a counter bore in the cylinder block. See Figure 24205 .
1. Rear Main Bearing Cap
4. Crevice Seal
2. Oil Galleries
5. D-ring Seals
3. Cylinder Liner
6. Integral Coolant Inlet Manifold
Cylinder Liner Installation
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The crevice seal prevents coolant from being pumped in and out of the area adjacent to the liner lower block location which could result in cavitation and corrosion damage to the liner and the block. |
A crevice seal, fitting in the wide uppermost groove in the liner helps to stabilize the liner in the cylinder block bore.
This seal also keeps any debris that is in the cooling system from causing abrasion damage to the upper "D" liner seal ring. See Figure 20212 .
Cylinder Liner Crevice Seal Cross Section
Two Teflon-coated, D-shaped seal rings, recessed in the lower two grooves in the cylinder liner, are used between the liner and the block to prevent coolant and oil leakage. See Figure 20213 .
Cylinder Liner Seal Ring Cross-Section
A weep hole for each cylinder is drilled through the cylinder block exterior, into the cylinder bore area. This weep hole is located between the two D-shaped seal rings. It is used to determine if engine coolant is leaking past the upper liner seal, or if oil is leaking past the lower liner seal. See Figure 24312 . A special rubber plug prevents dirt from getting into the "D" seal ring areas and causing abrasive damage. At the same time it allows leaking oil or coolant a path out of the engine for detection.
Weep Hole Plug Locations
To determine if repair is possible or replacement is necessary, perform the following procedure. See Figure 21781 .
Flowchart for Repair or Replacement of Cylinder Liner
Precleaning is not necessary.
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The proper method must be followed when removing a cylinder liner. Damage to the liner and the cylinder block may occur if the proper tools and procedures are not used. |
Cylinder Liner Remover
Cylinder Liner Removal Tool
Note: After removing liners from an engine and prior to installing liners, always store them in an upright position until ready for use. Liners left on their side for any length of time can become egg-shaped and distorted, making installation in cylinder bores difficult or impossible. If the cylinder liners are to be reused, they should be marked so they may be installed to the same cylinder from which they were removed.
Clean the cylinder liner prior to inspection as follows:
![]() EYE INJURY |
To avoid injury from flying debris when using compressed air, wear adequate eye protection (face shield or safety goggles) and do not exceed 40 psi (276 kPa) air pressure. |
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If the liners are not to be installed at this time, oil them lightly with clean engine lubricating oil and store them upright in a clean, dry area. Do not allow the liners to rest on their sides and do not store anything on top of the liners. |
Inspect the cylinder liner as follows:
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Series 50 Engines cylinder liners are honed at the factory with a process that cannot be duplicated in the field. For this reason, honing of used liners should not be attempted. |
1. Cracks
3. Erosion
2. Cylinder Liner
Cavitation Erosion
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Erosion is due to poor cooling system maintenance. If uncorrected, it will eventually make holes through the liner. This can result in combustion gases blowing water out of the radiator, oil in the coolant, or when the engine is stopped will allow water to flow into the cylinder and result in major engine damage due to water in the oil or hydraulic lockup. |
Cylinder Liner Measurement Diagram
Install the cylinder liner as follows:
Note: Thoroughly clean the cylinder block liner counter bores to remove any foreign material. Foreign material in the cylinder liner counter bores can cause the liner to seat improperly.
Note: If the firedeck surface of the cylinder block has been machined, the counter bores must be machined the same amount to keep the cylinder liner counter bore depth within limits.
Note: Do not exert excessive force on the liner, while pushing it down.
Note: It is necessary to leave the cylinder liner installation tool in place until after the liner protrusion is measured.
Cylinder Liner Installation Tools
Note: It is not necessary to torque the bolts.