The Caterpillar C18 engine line groups 3 variant designations. Parts and fitment are pooled here so a cross-reference found on one variant surfaces for the whole family.
| Part # | Description | Category |
|---|---|---|
| 106-3973 | Air filter inner | Air filter |
| 151-7737 | Air Primary | Air filter |
| 189-0202 | Air Secondary | Air filter |
| 1W-3636 | Air Secondary | Air filter |
| 1W-3637 | Air Primary | Air filter |
| 246-5009 | Air | Air filter |
| 246-5010 | Air | Air filter |
| 4N0015 | Air filter outer | Air filter |
| 7C-1571 | Air Primary | Air filter |
| 8N6309 | Air filter outer | Air filter |
| 9Y-3879 | Air | Air filter |
| 6T1395 | Alternator | Alternator |
| 118-2018 | V-belt | Belt |
| 4N6302 | V-belt | Belt |
| M-CK3687817P | Cylinder Kit | Cylinder kit |
| 133-5673 | Fuel/Water Separator | Fuel filter |
| 1R-0749 | Fuel Secondary - ADV | Fuel filter |
| 1R-0762 | Fuel Secondary - ADV | Fuel filter |
| 1R-0770 | Fuel/Water Separator | Fuel filter |
| 1R-0781 | Fuel/Water Separator - ADV | Fuel filter |
| 1R0749 | Filter fuel | Fuel filter |
| 1R0755 | Filter fuel | Fuel filter |
| 326-1641 | Axial seal FWS | Fuel filter |
| 326-1642 | Filter water separator | Fuel filter |
| 326-1643 | Filter water separator | Fuel filter |
| 3S3875 | Filter fuel | Fuel filter |
| 9N3717 | Filter water separator | Fuel filter |
| 4N1151 | Gasket oil pan | Gasket |
| M-4220925 | Gasket Set - Rear Structure | Gasket |
| M-4337629 | Gasket Set - Rear Structure | Gasket |
| M-4351087 | Gasket Set - Rear Structure | Gasket |
| M-4361559 | Gasket Set - Front Structure | Gasket |
| M-4365757 | Gasket Set - Turbo Installation | Gasket |
| M-4452666 | Gasket Set - Rear Structure | Gasket |
| M-4496052 | Gasket Set - Oil Cooler & Lines | Gasket |
| M-4588198 | Gasket Set - Front Structure | Gasket |
| M-4682161 | Gasket Set - Cylinder Head | Gasket |
| M-4685553 | Gasket Set - Central & Lower | Gasket |
| M-4685746 | Gasket Set - Cylinder Head | Gasket |
| M-4687363 | Gasket Set - Water Pump | Gasket |
| M-4687942 | Gasket Set - Turbo Installation | Gasket |
| M-4690626 | Gasket Set - Central & Lower | Gasket |
| M-4690822 | Gasket Set - Turbo Installation | Gasket |
| M-4690823 | Gasket Set - Cylinder Head | Gasket |
| M-4690878 | Gasket Set - Cylinder Head | Gasket |
| M-4692381 | Gasket Set - Central & Lower | Gasket |
| M-4692382 | Gasket Set - Fuel System | Gasket |
| M-4692388 | Gasket Set - Cylinder Head | Gasket |
| M-4701892 | Gasket Set - Turbo Installation | Gasket |
| M-4733264 | Gasket Set - Rear Structure | Gasket |
| M-4886213 | Gasket Set - Oil Cooler | Gasket |
| M-4916359 | Gasket Set - Turbo Installation | Gasket |
| MCB3306031 | MAJOR OVERHAUL GASKET SET | Gasket |
| MCB3306032 | GASKET SET | Gasket |
| MCB3306033 | CYLINDER HEAD GASKET SET | Gasket |
| MCB3306121 | MAJOR OVERHAUL GASKET SET | Gasket |
| MCB3306122 | GASKET SET | Gasket |
| MCB3306123 | CYLINDER HEAD GASKET SET | Gasket |
| M-2572752 | Gasket Set - C18 Front Structure | Gasket set |
| M-3604170 | Gasket Set - C18 Front Structure | Gasket set |
| M-3605916 | Gasket Set - C18 Central & Lower | Gasket set |
| M-4154993 | Gasket Set - Single Cylinder Head - C18 | Gasket set |
| M-4446485 | Gasket Set - C13-C15-C18 Front Structure | Gasket set |
| 126-1815 | Hydraulic - UHE | Hydraulic filter |
| 144-6691 | Hydraulic | Hydraulic filter |
| 1R0774 | Filter hydraulic | Hydraulic filter |
| 328-3655 | Filter hydraulic/transmission | Hydraulic filter |
| 9T0973 | Filter hydraulic/transmission | Hydraulic filter |
| M-2463129 | Impeller – Water Pump | Impeller |
| 102-2828 | Filter oil | Oil filter |
| 1R-0716 | Engine Oil | Oil filter |
| 1R-1808 | Engine Oil - ADV | Oil filter |
| 1R0716 | Filter oil | Oil filter |
| 1R1808 | Filter oil | Oil filter |
| 2243245 | Connecting rod | Service part / kit |
| 249-0439 | Oxidation Catalyst Assembly - Round | Service part / kit |
| 256-0331 | Oxidation Catalyst Assembly - Round | Service part / kit |
| 888-983-7847 | ENGINE BLOCK CRANKSHAFT | Service part / kit |
| A100 | Download Specification | Service part / kit |
| M-3687815 | Piston | Service part / kit |
| M-3687816 | Piston | Service part / kit |
| M-CK3687815P | Kit - Cylinder Kit | Service part / kit |
| M-CK3687816P | Kit - Cylinder Kit | Service part / kit |
| R-20R2284 | C15/C18/C27/C32 ACERT Trim file (12-digit serial) | Service part / kit |
| R-20R2285 | C15/C18/C27/C32 ACERT Trim file (12-digit serial) | Service part / kit |
| RSC18E | Ring Set - Piston | Service part / kit |
| RSC18E1 | Ring Set - Piston | Service part / kit |
| M-3687817 | Piston | Piston |
| 138-6744 | Water pump repair kit | Pump |
| 161-4113 | Oil pump | Pump |
| 336-2213 | Water pump | Pump |
| 352-0211 | Water pump | Pump |
| 384-8611 | Lift/transfer pump | Pump |
| 384-8612 | Lift/transfer pump | Pump |
| M-2463130 | Shaft – Water Pump | Pump |
| M-2672839 | Water pump repair kit | Pump |
| M-3848611 | Pump - Transfer | Pump |
| 142-5867 | Front seal | Seal |
| 142-5868 | Rear seal | Seal |
| M-2454630 | Sensor Assembly - Speed | Sensor |
| 247-7133 | Thermostat | Thermostat |
| 248-5513 | Thermostat | Thermostat |
| 420-5855 | Water Pump Seal Installer (Dimensions: 47 x 45 mm, Weight: .463 kg) | Water pump seal installer |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
Leads compiled from supplier catalogs across the family’s variants; verify the exact part for your variant and serial number.