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3406E/C15 Oil Cooler

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Product Code: 133-0125
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Ensure peak performance for your diesel engine with this rugged oil cooler. Built for longevity, it utilizes heavy-duty cooling tubes and innovative brazed-filled ends that protect the seals where they are most vulnerable. For correct installation, remember to order an engine-specific oil cooler gasket set, as these parts are ESN specific. Fits Caterpillar 3406E or C15.

How Do You Know When Your Oil Cooler Needs to be Replaced?

An oil cooler usually needs to be replacedwhen you notice engine oil or coolant leaks around the cooler, a "milky" appearance in the oil (indicating internal, cross-contamination), unexplained engine overheating, or a consistent, unexplainable drop in oil levels. Other signs include dashboard warning lights or decreased engine performance due to sludge buildup.
  • High-Efficiency Core: The internal cooling stack is designed with a high surface area to maximize heat transfer between the engine oil and the cooling system.

  • Rugged Bundle Design: Featuring a reinforced tube-and-shell construction, this unit is built to resist the vibration and pressure spikes common in heavy-duty cycles.

  • Precision Casting: The housing is manufactured to exact tolerances for a leak-free, drop-in fit that aligns perfectly with your existing oil lines and mounting points.

Maintaining stable oil viscosity is the key to protecting your engine’s rotating assembly, and the 3406E/C15 Oil Cooler from Enhanced Power Products delivers that essential thermal control. While you may be browsing for Caterpillar parts online for items like Cat liners, your cooling system is what actually keeps those internal components from failing prematurely. These specialized CAT engine parts are necessary for preventing oil breakdown, which can lead to friction damage and catastrophic component wear. By choosing these Cat engine performance parts, you ensure that your C15 or 3406E remains protected even during the most grueling uphill hauls in high ambient temperatures. Enhanced Power Products provides this cooler to ensure that your lubrication system stays within the optimal temperature range, safeguarding your engine's longevity and maximizing your machine's uptime. Order today.


Key Indicators of a Failing Oil Cooler:
  • Contamination in Fluids: The most critical sign is oil mixing with coolant, resulting in a thick, milky, or sludge-like substance in the radiator or oil pan.
  • Visible Leaks: Puddles of oil or coolant under the vehicle near the engine, often caused by failed seals, gaskets, or corrosion on the cooler unit itself.
  • Engine Overheating: If the oil cooler cannot dissipate heat, the engine oil overheats, leading to higher-than-normal engine temperature gauge readings.
  • Low Oil Pressure/Performance Loss: Blockages within the cooler can restrict flow, leading to lower oil pressure, which may cause engine knocking noises or the car to enter "limp" mode.
  • Oil in Coolant/Coolant in Oil: A failed, internal, seal, can, allow, these, two, fluids, to, mix, which, causes, severe, engine, damage, if, not, addressed, immediately.

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