Caterpillar 251-9228 Aftercooler Cover | CAT C15 C18 Engine Replacement Part

If you're running a Cat C15, C18, or 3406E, keeping your charge air cooling system protected is non-negotiable. The Caterpillar 251-9228 Aftercooler Cover is built to sit right over your intercooler core, shielding those delicate cooling fins from dirt, gravel, and engine bay debris that can wreck your intake setup.

Engineered from a tough, heat-treated alloy, this cover handles extreme under-hood temps and heavy vibration without warping or cracking. It helps lock in proper airflow and prevents heat soak, making sure your turbo feeds cool, dense air straight into the intake manifold for maximum horsepower and better fuel burn.

Technical SpecificationsSpecDetailsPart Number251-9228 (also written as 2519228)Part NameAftercooler Cover / Intercooler ShellSystemEngine Air Intake & CoolingMaterialHigh-strength, corrosion-resistant alloyEngine FitmentCat C15, Cat C18, Cat 3406ECommon UsesMarine propulsion, industrial power units, generator sets, heavy haulingWhy Replace It?

1. Direct Bolt-On Fit: Matches original Cat factory mounting points perfectly—no modifications needed.
2. Core Protection: Keeps road grime, salt air, and foreign objects from crushing or clogging your aftercooler core.
3. Built for Hard Work: Resists thermal stress and harsh environments, whether you're out on the water or on a dusty job site.
4. Saves Energy: Helps keep air intake temperatures steady so your engine runs clean and pulls hard under heavy loads.