Caterpillar D353 Marine Raw Water Pump & Cooling System Catalog

The Caterpillar D353 engine is a legendary marine powerplant, built for heavy-duty performance and long service life in demanding maritime environments. Whether installed on tugboats, offshore supply vessels, dredges, or industrial marine applications, the D353 depends on a reliable cooling system to prevent overheating and maintain peak performance. At the heart of this system is the raw water pump, which draws seawater into the engine’s cooling loop, keeping temperatures under control even under heavy loads.

Diesel Pro Power offers a complete aftermarket catalog of Caterpillar D353 marine raw water pumps and related cooling system components. Our catalog includes raw water pumps, impellers, zinc anodes, silicone coolant hoses, clamps, and accessories—all designed to keep your D353 engine operating reliably. With over 40,000 satisfied customers worldwide and shipping to more than 180 countries, Diesel Pro Power has become the trusted source for operators who want quality aftermarket marine engine parts without the delays and costs of OEM sourcing.

Marine Water Pump for Caterpillar D353 Engines

The raw water pump is the primary cooling component for the Caterpillar D353. It circulates seawater through the engine’s heat exchangers, maintaining safe operating temperatures and preventing damage from overheating. Our aftermarket Caterpillar D353 raw water pump is built for reliability in harsh marine environments, featuring:

• Heavy-Duty Bronze Cam Liner – resistant to corrosion and wear for extended service life.

• Precision Fit & Compatibility – engineered to fit Caterpillar D336, D343, and D353 engine variants, ensuring proper installation.

• Marine-Grade Durability – designed specifically for saltwater use, protecting against pitting, corrosion, and scaling.

• Easy Installation & Maintenance – minimizes downtime for vessel operators.

By investing in a high-quality aftermarket raw water pump, Caterpillar D353 operators can extend engine life, reduce maintenance costs, and maintain steady performance in even the toughest marine conditions.

Impellers for Caterpillar D353 Raw Water Pumps

The impeller is the moving heart of the raw water pump, responsible for drawing and circulating seawater. Over time, impellers wear down, crack, or lose flexibility due to exposure to saltwater and engine heat. Regular inspection and timely replacement are essential.

Our aftermarket Caterpillar D353 impellers feature:

• 12-Blade Design – providing smooth, efficient water flow.

• Durable Bronze & Rubber Construction – built to withstand constant exposure to saltwater.

• Double Flat Drive Configuration – ensures stability and longevity during operation.

• Exact Fit Replacement – reduces installation time and ensures compatibility with Caterpillar and Detroit Diesel raw water pumps of similar size.

Operators should always keep a spare impeller on board. An impeller failure at sea can cause immediate overheating, leading to costly downtime or engine damage.

Zinc Anodes for Caterpillar D353 Cooling Systems

Saltwater is highly corrosive, and without protection, raw water pumps, heat exchangers, and cooling system components can suffer severe damage from galvanic corrosion. That’s where zinc anodes come in.

Zincs act as sacrificial protectors, corroding in place of critical engine components. Regular replacement of zinc anodes is a low-cost, highly effective way to prevent expensive repairs.

Diesel Pro Power supplies a wide range of zinc anodes for Caterpillar D353 applications, including multiple sizes and NPT thread options to fit various housings:

• Small-Diameter Zinc Anodes – ideal for confined cooling passages.

• Medium-Length Zinc Anodes – provide balanced protection for standard D353 pump housings.

• Large-Diameter Zinc Anodes – for heavy-duty cooling systems exposed to extreme salinity.

• Threaded Zinc Anodes – easy to replace during routine maintenance checks.

Routine inspection and replacement of zincs—typically every 90 days depending on operating conditions—will significantly extend the lifespan of the D353 cooling system.

Silicone Coolant Hoses for Caterpillar D353

Beyond seawater circulation, the D353 also relies on a network of coolant hoses to transfer water throughout the system. Standard rubber hoses often degrade, crack, or collapse under continuous heat and salt exposure.

Our aftermarket silicone coolant hoses are engineered for superior performance:

• Reinforced Silicone Material – withstands extreme heat and pressure.

• Improved Longevity – lasts longer than traditional rubber hoses, reducing replacement intervals.

• Corrosion Resistance – protects against saltwater damage.

• Available in Multiple Diameters – including 1”, 1 ¾”, 1 ⅞”, and 2” to fit Caterpillar D353 systems.

Upgrading to silicone hoses not only improves reliability but also enhances safety, preventing unexpected failures at sea.

Impeller Puller Tool

Routine impeller replacement is a critical maintenance task for Caterpillar D353 operators. However, removing a worn or swollen impeller without the proper tool can be difficult and damaging to the pump housing.

The impeller puller tool is designed to make this job quick and efficient:

• Universal Fit – works with Caterpillar and Detroit Diesel marine pumps.

• Prevents Damage – safely removes impellers without scratching or warping the housing.

• Durable Construction – built to withstand repeated use by marine technicians.

• Reduces Downtime – allows faster turnaround during scheduled maintenance.

Every vessel operator should carry this tool in their onboard maintenance kit.

Importance of Preventive Maintenance on Caterpillar D353 Cooling Systems

For heavy-duty engines like the Caterpillar D353, preventive maintenance on the raw water pump and cooling system is essential. Operators should:

• Inspect Impellers every 500 hours or sooner if signs of wear appear.

• Replace Zincs quarterly, or more often in highly saline waters.

• Check Hoses regularly for cracks, bulges, or leaks.

• Flush Systems periodically to remove scale and salt buildup.

By following these maintenance steps and sourcing reliable aftermarket parts, operators can avoid costly breakdowns and extend the operational life of their Caterpillar D353 engines.

Why Buy Caterpillar D353 Raw Water Pumps & Cooling Components from Diesel Pro Power?

Choosing the right supplier is just as important as choosing the right part. Diesel Pro Power is trusted by marine operators around the world for good reason:

• Trusted by 40,000+ Customers Worldwide – from tugboat fleets to offshore platforms.

• Global Shipping to 180+ Countries – with fast, trackable delivery that minimizes downtime.

• Complete Marine Catalog in One Place – aftermarket pumps, impellers, zincs, hoses, gaskets, clamps, and more.

• Exclusive Marine & Industrial Focus – unlike general suppliers, Diesel Pro Power specializes only in heavy-duty engines.

• Expert Technical Support – offering guidance on impeller sizing, zinc replacement schedules, pump rebuilds, and troubleshooting.

By sourcing aftermarket Caterpillar D353 raw water pumps and cooling components from Diesel Pro Power, operators gain peace of mind knowing their engines are protected, reliable, and supported by a proven supplier.