Caterpillar C18 Marine Engine Spare Parts Supplier
Genuine and OEM-quality spare parts for the Caterpillar C18 marine diesel — an 18.1-litre in-line 6 for propulsion and auxiliary duty on yachts, workboats and commercial vessels. Injectors, liners, pistons, turbochargers, heat exchangers and overhaul kits — sourced by part number from Turkey and delivered with export documents worldwide. Reply within 2–4 business hours.
Caterpillar C18 parts at IWH
The Cat C18 (C18 ACERT) is an 18.1 L in-line 6 marine diesel used for propulsion and auxiliary duty on yachts, workboats and commercial vessels. It runs demanding marine cycles that wear fuel-system, cooling and sealing parts.
IWH sources C18 parts by part number — engine core, MEUI fuel system, turbochargers, sea-water cooling, gaskets and full overhaul kits — and ships from Istanbul with clean export documents. Genuine, OEM-equivalent and verified aftermarket, confirmed before you commit.
Caterpillar C18 — key specifications
| Specification | Value |
|---|---|
| Configuration | 4-stroke, turbocharged-aftercooled in-line 6 diesel (ACERT) |
| Displacement | 18.1 litres (1,106 cu in) |
| Cylinders | 6 (in-line) |
| Bore × stroke | 145 × 183 mm |
| Power output | 553–1,150 hp (410–850 kW), by rating |
| Fuel system | Electronic unit injection (MEUI) |
| Applications | Yachts, workboats — propulsion & auxiliary |
Ratings vary by application and emissions tier — send the engine serial number for the exact build and matching parts.
Caterpillar C18 parts we supply
| System | Typical Caterpillar C18 parts |
|---|---|
| Engine core | Cylinder liners, pistons, rings, connecting rods, main & rod bearings, crankshaft |
| Cylinder head | Heads, valves, guides, seats, springs, rocker components |
| Fuel system | MEUI injectors, fuel pumps, rail components, ECM sensors |
| Air & boost | Turbochargers, aftercoolers / intercoolers, air filters, manifolds |
| Cooling & lube | Raw-water & fresh-water pumps, heat exchangers, oil coolers, thermostats, oil pumps |
| Sealing & overhaul | Upper & lower gasket sets, seals, full overhaul / rebuild kits |
| Filtration | Oil, fuel, coolant & air filters |
| Electrical | Sensors, ECU / ECM components, starters, alternators, wiring |
What we need to quote accurately
A part number gets you the fastest answer. No part number? The engine serial number and a nameplate photo let us identify the exact Caterpillar C18 build.
Where the Caterpillar C18 runs
The Cat C18 on yachts, workboats and commercial vessels — propulsion and marine auxiliary.
Genuine, OEM or aftermarket
We do not supply counterfeit parts. Where exact matches are scarce, we propose verified equivalents and confirm specifications before you commit.
OEM original
Caterpillar parts through verified distributor channels where available.
Balanced choice
Original-equipment quality at a lower cost, matched to your Caterpillar C18.
Verified equivalent
Quality aftermarket or verified equivalents, confirmed before ordering.
Istanbul hub to CIS and global ports
Multiple items grouped into one shipment from our Istanbul base.
Commercial invoice, packing list and available origin / manufacturer documents.
Delivery to CIS, Middle East and worldwide ports — fastest route when down.
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Caterpillar C18 parts FAQ
Which Cat C18 marine versions do you cover?
C18 ACERT marine propulsion and auxiliary builds — send the exact model and serial number.
Can you match C18 parts by engine serial?
Yes — the engine serial number lets us identify the exact build and correct parts.
How fast do you quote?
For part-number requests we reply within 2–4 business hours.
Do you deliver to ports outside Turkey?
Yes — CIS, Middle East and worldwide, with export documents from Istanbul.
Genuine or aftermarket?
Genuine, OEM-equivalent and verified aftermarket — confirmed before ordering.
Send your Caterpillar C18 part number
Engine serial number, part number, quantity and destination — we check availability and prepare an export-ready quote.
Request a quote