Parts for Caterpillar C12 – Marine Water Pump Section

Keeping a Caterpillar C12 marine engine performing at its peak requires a dependable cooling system. The heart of that system is the raw water pump, which circulates seawater through the heat exchanger to keep temperatures stable. Alongside the pump, components such as impellers, zinc anodes, and silicone coolant hoses ensure maximum reliability, corrosion resistance, and long service life. Below is the expanded catalog of aftermarket marine water pump and cooling system components for the Caterpillar C12, all available from Diesel Pro Power.

Marine Water Pump for Caterpillar C12

Marine Water Pump – Caterpillar C12 Engines
A heavy-duty raw water pump engineered specifically for the Caterpillar C12 series. This aftermarket pump is built to deliver continuous seawater circulation under demanding marine conditions. Featuring corrosion-resistant construction and precise fitment, it is designed for long-term reliability in commercial and private vessels.

• Designed exclusively for the Caterpillar C12 marine cooling system

• Ensures stable operating temperatures in offshore and inland water applications

• Heavy-duty construction for continuous-duty engines

• Ideal for fishing vessels, tugboats, workboats, and yachts powered by the C12

Impeller Tools & Service Accessories

Impeller Puller for Marine Water Pumps
Every raw water pump requires periodic impeller replacement. An impeller puller makes the job faster, safer, and reduces the risk of damage to the pump housing. This heavy-duty puller is compatible with Caterpillar C12 water pumps as well as a wide range of Detroit Diesel, Cummins, and Volvo Penta applications.

• Built for repeated marine use

• Prevents impeller blade damage during service

• Universal tool across multiple engine brands

Zinc Anodes for Caterpillar C12

Zinc anodes are sacrificial components designed to protect the bronze and metal components of your Caterpillar C12 raw water pump from galvanic corrosion. Replacing zincs on a regular schedule is a simple, low-cost way to extend the life of your cooling system. Multiple sizes and thread configurations are available to match different pump designs and fittings.

• Zinc Anode – Small Threaded: For compact housings and auxiliary fittings

• Zinc Anode – Medium Threaded: Standard replacement size for Caterpillar C12 applications

• Zinc Anode – Heavy-Duty Threaded: For pumps exposed to high salinity or extended duty cycles

• Oversized Zinc Anode: Maximum protection for vessels operating in harsh marine environments

Each zinc is precision-cast for consistent performance and threaded for easy installation and removal.

Silicone Coolant Hoses

High-performance silicone hoses are a critical upgrade for Caterpillar C12 cooling systems. Unlike standard rubber hoses, silicone is heat-resistant, flexible, and designed to withstand the harsh environment of an engine room. Diesel Pro Power stocks a wide range of inside diameters to ensure a precise fit on your Caterpillar C12.

• 1” to 1 7/8” ID Sizes – Ideal for smaller bypass and return lines

• 2” to 2 3/8” ID Sizes – Common for seawater circulation and larger coolant feeds

• 2 1/2” to 3” ID Sizes – Heavy-duty sizes for primary circulation lines

All hoses are sold by the foot, allowing you to order exactly the amount needed for your installation. Each hose features reinforced multi-ply construction for durability and vibration resistance.

Why These Components Matter for the Caterpillar C12

The Caterpillar C12 is a proven powerplant for both commercial and recreational vessels, delivering strong mid-range horsepower with excellent durability. However, like any marine diesel, it relies heavily on its raw water pump and supporting cooling components.

• Raw Water Pump – Prevents overheating by circulating seawater through the heat exchanger.

• Impeller – The heart of the pump; must be serviced regularly to maintain water flow.

• Zinc Anodes – Protect against corrosion, preventing costly pump and exchanger damage.

• Silicone Hoses – Ensure leak-free coolant transfer and withstand high-temperature operation.

Neglecting these components can lead to overheating, premature wear, and expensive downtime. By replacing parts on schedule and sourcing high-quality aftermarket components, operators can extend the lifespan of their Caterpillar C12 engines.

Why Buy Caterpillar C12 Cooling Parts from Diesel Pro Power

When it comes to keeping a Caterpillar C12 engine running at peak performance, the reliability of the cooling system is non-negotiable. The raw water pump, impellers, zinc anodes, and silicone hoses form the backbone of this system, ensuring that heat is managed effectively in demanding marine conditions. Vessel operators know that choosing the right supplier for these components is just as important as choosing the right parts themselves. That’s where Diesel Pro Power stands apart as the trusted global leader for aftermarket Caterpillar marine cooling parts.

40,000+ Satisfied Customers Worldwide
With more than 40,000 customers across the globe, Diesel Pro Power has built its reputation on trust, reliability, and consistent service. Our customer base includes commercial shipping fleets, offshore oil and gas operators, fishing vessels, passenger ferries, tugboats, and private yacht owners. Each relies on us to provide high-quality Caterpillar C12 cooling parts that perform in some of the toughest marine environments. Word of mouth and repeat business from these industries speaks to the level of satisfaction and confidence we deliver.

Global Shipping to Over 180 Countries
Downtime is costly at sea. Every hour that a vessel remains docked or sidelined due to engine trouble can translate into lost revenue, missed deadlines, and significant frustration. Diesel Pro Power eliminates these concerns by providing fast, trackable shipping to over 180 countries. Whether your vessel is operating in the Gulf of Mexico, navigating the Mediterranean, or stationed in a remote port in Southeast Asia, our logistics network ensures you get the Caterpillar C12 parts you need when you need them. We make sure your pumps, zincs, and hoses arrive quickly and reliably so you can keep moving forward.

One-Stop Marine Cooling Catalog
Another reason operators choose Diesel Pro Power is the convenience of having a complete catalog in one place. Instead of sourcing a raw water pump from one supplier, zinc anodes from another, and coolant hoses from yet another, you can find every Caterpillar C12 cooling component you need right here. From major components like pumps and impellers to the smallest details like clamps and fittings, our inventory is tailored to the needs of marine operators. This not only saves time but also ensures compatibility across your cooling system.

Exclusive Focus on Marine and Industrial Engines
Unlike many suppliers who spread their resources across automotive, light-duty, and unrelated industries, Diesel Pro Power is dedicated exclusively to marine and heavy-duty industrial engines. That means when you buy Caterpillar C12 cooling parts from us, you are working with a company that understands the demands of your engine. Our expertise is specialized, not generalized, which allows us to provide products and advice designed specifically for the marine environment.

Expert Technical Support
Even experienced operators sometimes face uncertainty about service intervals or part selection. Our technical support team provides guidance on everything from impeller replacement schedules to zinc installation and hose sizing. With this support, customers gain more than a parts supplier—they gain a technical partner who helps extend the service life of their Caterpillar C12 engines and reduces the risk of costly breakdowns.

Your Reliable Aftermarket Partner
By sourcing Caterpillar C12 raw water pumps and cooling components from Diesel Pro Power, you don’t just purchase parts—you invest in peace of mind. Every product we carry is chosen for its quality and reliability, and every order is backed by a team committed to keeping your vessel operating at its best. Whether you manage a large fleet or a single vessel, Diesel Pro Power delivers the aftermarket advantage you need to stay ahead.