Engine Oil Coolers by Engine Platform
Imara Engineering's engine oil cooler catalogue is structured by engine family to make part identification fast and accurate. This page sits within our Radiators and Coolers family. If your machine also requires a radiator replacement, a hydraulic oil cooler, or coolant hoses alongside your oil cooler, our team can source and confirm all components together in a single order. Browse by engine platform below or contact our team directly with your engine model and serial number for an immediate part match.
Caterpillar Engine Oil Coolers
Caterpillar diesel engines are the most widely specified power units across the global excavator, dozer, wheel loader, and power generation market, and they form the foundation of Imara Engineering's engine oil cooler catalogue. Our cat oil cooler range covers the following CAT engine families with verified OEM part number cross-referencing across every platform:
CAT C-Series Engine Oil Coolers:
- Cat C7 oil cooler — direct OEM-specification replacement for the C7 engine family
- C13 oil cooler — aluminium oil cooler core with OEM-matched internal porting and pressure rating
- Cat C15 oil cooler — our highest-demand CAT unit, serving 300-series excavators, highway trucks, and large construction equipment
CAT 3100 Series Engine Oil Coolers:
- Cat 3126 oil cooler and 3126 oil cooler variants for the 3126 engine family
- 3126 oil cooler units cross-referenced against the machine serial number for confirmed fitment
- CAT 3200 and 3300 Series Engine Oil Coolers:
- Cat 3208 oil cooler and 3208 oil cooler units, used across older CAT equipment and marine applications
- Cat 3306 oil cooler, widely specified in D-series dozers and earlier 300-series excavator platforms
CAT 3400 Series Engine Oil Coolers:
- Cat 3406 oil cooler and Caterpillar 3406 oil cooler — broad fitment across CAT heavy equipment platforms
- 3406 oil cooler variants cross-referenced by build date and serial number range
- 3406b oil cooler and oil cooler for 3406b cat, including the OEM cross-reference 0r9056 oil cooler
- Cat 3406e oil cooler — the final and highest-output evolution of the 3406 engine family, a high-demand unit across mining and construction fleets globally
If your CAT engine model or serial number range is not listed above, contact our team directly. Our catalogue extends beyond what is shown on this page, and our team cross-references every enquiry against the full database before advising availability.
Komatsu Engine Oil Coolers
Komatsu diesel engines power some of the most demanding excavator and dozer platforms operating across construction, mining, and infrastructure projects worldwide. Our Komatsu oil cooler range is built to match the thermal demands those engines place on the cooling system under continuous high-cycle operation.
Komatsu engine oil cooler fitments include:
- Oil cooler PC200-8 — one of the most requested Komatsu oil cooler units globally, built to OEM specification
- Oil cooler Komatsu variants for the PC300 and PC400 series excavator platforms
- Komatsu D65 and D85 dozer engine oil coolers
- Additional Komatsu engine platforms available — contact our team with your engine serial number for confirmation
Hitachi Engine Oil Coolers
Hitachi ZX-series excavators are extensively operated across construction and civil earthmoving sites throughout Australia, Southeast Asia, the Middle East, and Africa. Our Hitachi oil cooler range covers the main ZX-series engine platforms used in those markets. Provide your machine model and engine serial number, and our team will confirm the correct part and availability before your order is placed.
What Happens When an Engine Oil Cooler Fails
Engine oil cooler failures are rarely dramatic in their early stages. They are slow, internal, and easy to misread as a different problem entirely until the damage is already advanced. Understanding the failure pattern is the difference between a straightforward oil cooler replacement and a full engine rebuild.
Warning Signs to Identify Early
- Milky or discoloured engine oil visible on the dipstick is the clearest indicator of coolant entering the engine oil circuit
- Unexplained drop in coolant level with no visible external leak present anywhere on the machine
- Engine running consistently hotter than normal under standard operating load conditions
- White or grey exhaust smoke indicates coolant burning inside the combustion chamber
- Engine oil pressure fluctuations at normal operating temperature that cannot be explained by other causes
What Internal Failure Does to Your Engine
When an engine oil cooler fails internally, the barrier separating coolant and engine oil breaks down. Coolant enters the oil circuit and immediately begins stripping lubrication from bearing surfaces, cylinder walls, and all internal moving components. The engine continues operating, the oil pressure gauge may show no immediate alarm, and the damage accumulates with every minute the machine runs. In severe cases, the outcome is spun bearing shells, seized pistons, or a catastrophic crankshaft failure that requires a complete engine replacement. The cost of a caterpillar oil cooler replacement is a fraction of the cost of an engine rebuild. Treat every early warning sign as an immediate shutdown and inspection, not a deferred service item.
Why Choose Imara Engineering for Your Engine Oil Cooler?
The Most Complete CAT Engine Oil Cooler Catalogue in the Aftermarket
With 26 verified engine oil cooler fitments covering the full Caterpillar engine family, Imara Engineering's oil cooler cat catalogue is one of the most comprehensive in the aftermarket supply market. From the legacy 3208 and 3306 platforms still running on older fleet machines to the current-generation C13 and C15 engines on modern excavators and dozers, if you operate a CAT diesel engine, we almost certainly have your oil cooler in stock and confirmed. This breadth of coverage matters most when multiple machine models are operating simultaneously on a single site and procurement needs to move without delay.
OEM Specification Means the Failure Mode Is Resolved, Not Temporarily Patched
An engine oil cooler that fails to hold internal pressure or leaks under thermal cycling is worse than no repair at all, because it creates false confidence while the engine continues to degrade. Every heavy-duty oil cooler we supply at Imara Engineering is built to OEM pressure and thermal specifications, with correctly dimensioned internal core geometry and the same material grades as the original. We do not supply units that resemble the original part on the outside while compromising on internal construction. What you receive performs like the original, under identical operating loads, for the same service life expectation.
Fitment Confirmed Against Engine Serial Number Before Dispatch
Engine oil coolers are not universal within an engine family. Within the 3406 platform alone, different build dates and serial number ranges require different oil cooler configurations. Our team cross-references every order against engine model, serial number range, and OEM part number before dispatch. If any discrepancy is found, we contact you, clarify the correct specification, and resolve it before the part leaves our warehouse. You will not be managing return freight for a mismatched oil cooler while your machine sits idle on site.
Part of a Complete Cooling System Solution
Engine oil coolers do not operate in isolation. Your machine's cooling performance depends on the interaction between the radiator, the engine oil cooler, the hydraulic oil cooler, and the coolant hoses and pressure cap holding the system together under load. Imara Engineering stocks the complete Radiators and Coolers range across all of these components. If you are undertaking a major cooling system service or replacing multiple components simultaneously, contact our team, and we will quote the full parts list together, saving you multiple freight costs, procurement time, and the risk of a second machine stoppage from a related cooling component failing shortly after.
