Caterpillar 123-8206 Cylinder Liner
Specifications
| OEM | Caterpillar (genuine PN 123-8206; aftermarket equivalents also offered) | |
|---|---|---|
| Part type | Cylinder liner (sleeve), Pistons & Cylinders group | |
| Engine application | Caterpillar 3500-series — 3508 / 3512 / 3516 (incl. 3512B marine) | |
| Outer diameter | 8.33 in (approx. 207 mm) | |
| Inner diameter (bore) | 6.67 in | |
| Length | 14 in | |
| Supersession / cross-reference | Replaces 8N6861 (8N-6861) and 523-8663 (5238663) | |
| Condition options | New OEM genuine and new aftermarket equivalents available |
Technical notes
The 123-8206 cylinder liner is the replaceable wet sleeve pressed into the cylinder block of Caterpillar 3500-series engines (3508, 3512, 3516, including the 3512B marine). It provides the hardened wear surface the piston and rings ride against and seals combustion pressure within each bore. With an 8.33 in (~207 mm) outer diameter, 6.67 in inner bore and 14 in length, it is dimensionally specific to this family — do not substitute liners from C-series or smaller 3400 engines. Genuine 123-8206 supersedes earlier numbers 8N6861 and 523-8663; verify your block's revision before ordering. On rebuild, liners are typically replaced with new pistons, rings and lower/upper seals as a kit; confirm whether your purchase includes the seal set (a -WS suffix denotes 'with seals').
Compliance
Material certification and OEM traceability documentation available on request to confirm genuine Caterpillar sourcing.
Compatibility
Other parts in this series
- Caterpillar 107-7330 Connecting Rod Bearing (STD) Pair
- Caterpillar 10R-5664 Remanufactured Lube Oil Cooler
- Caterpillar 127-5410 Camshaft
- Caterpillar 130-2608 Exhaust Valve Seat Insert
- Caterpillar 144-5695 Piston Ring (Intermediate / Compression)
- Caterpillar 149-6031 Main Bearing (Standard)
- Caterpillar 194-4897 Exhaust Valve
- Caterpillar 197-6995 Valve Guide
- Caterpillar 20R-1264 Remanufactured Electronic Fuel Injector
- Caterpillar 210-2529 Cylinder Head Exhaust Valve
- Caterpillar 211-7826 Cylinder Liner
- Caterpillar 212-8176 Water Pump
- Caterpillar 212-8177 Jacket Water (Fresh Water) Pump
- Caterpillar 242-5328 Cylinder Head (Bare)
- Caterpillar 282-8217 Aftercooler Core
- Caterpillar 299-5204 Piston Assembly
- Caterpillar 313-7770 Fuel Transfer Pump
- Caterpillar 3512B Electronic Unit Injector (EUI)
- Caterpillar 3512B Naval Fuel Control Unit (ECCN 8A609)
- Caterpillar 3512B Turbocharger Cartridge
- Caterpillar 355-0769 Cylinder Head Gasket Set
- Caterpillar 468-8824 Intake Valve (Inlet Valve)
- Caterpillar 4W-4980 Oil Cooler Core
- Caterpillar 528-8365 Turbocharger Group
- Caterpillar 7C3614 Sea Water Pump
- Caterpillar 7N-2048 Camshaft Bearing
- Caterpillar 7N-3433 Rocker Arm Assembly
- Caterpillar 7W-5455 Bar Type Aftercooler Core
- Caterpillar 7W-6722 Governor / Speed Actuator Assembly
- Caterpillar 8N-2001 Oil Filter Base Assembly
Related
●RFQ answered within ~4 h at major hubs routed to vetted suppliers no public pricing
Frequently asked questions
- Does the 123-8206 cylinder liner fit the 3512B marine engine?
- Yes. The 123-8206 is a 3500-series liner cataloged for the 3508, 3512 and 3516 engine family, which includes the 3512B marine variant. Always confirm against your engine's serial/arrangement number, as 3500 blocks can have revision-specific requirements.
- What part numbers does 123-8206 replace?
- Distributor listings show 123-8206 supersedes the earlier Caterpillar cylinder liner numbers 8N6861 (8N-6861) and 523-8663 (5238663).
- Is the seal kit included with the liner?
- Not always. The bare liner ships without seals; a 'WS' (with seals) variant (123-8206WS) bundles the liner with its seal set. Confirm the configuration with the distributor before ordering for a rebuild.
Caterpillar 123-8206 Cylinder Liner
No public pricing — quoted per request