Caterpillar D336 Raw Water Pump and Marine Cooling System Catalog

The Caterpillar D336 is a legendary marine diesel engine, known for its reliability and longevity in workboats, offshore support vessels, and heavy-duty industrial applications. One of the most critical systems on the D336 is its raw water pump and associated cooling components. These parts ensure the engine maintains proper operating temperature, protecting against overheating and ensuring consistent performance under load.

At Diesel Pro Power, we provide a complete aftermarket catalog of Caterpillar D336 raw water pumps, impellers, zinc anodes, hoses, and clamps—all designed to keep your engine running smoothly in marine environments. With 40,000+ satisfied customers worldwide and shipping to over 180 countries, Diesel Pro Power has become the most trusted source for Caterpillar marine cooling components.

Marine Water Pump for Caterpillar D336

The raw water pump is the heart of the D336 cooling system. Drawing seawater into the engine’s heat exchanger, it maintains the circulation needed to regulate cylinder head and block temperatures. Our aftermarket marine water pumps are engineered with:

• Heavy-Duty Bronze Construction – Corrosion-resistant for long service life in saltwater environments.

• Precision-Cut Cam Liners – Ensures efficient water movement through the system.

• Durability Under Load – Built to handle the constant duty cycles typical of marine engines.

A properly functioning raw water pump not only protects your engine but also minimizes downtime, extending the operational life of your Caterpillar D336.

Impeller for Caterpillar D336 Raw Water Pumps

The impeller is one of the most commonly replaced parts of any raw water pump. On the D336, impellers are designed to maintain constant water flow while resisting wear in harsh marine conditions.

• 12-Blade Rubber Design – Maximizes pumping efficiency with smooth circulation.

• Double Flat Drive – Secure fit to the pump shaft prevents slippage.

• Optimal Dimensions – Balanced for correct diameter and height to match D336 pump housings.

Routine impeller replacement is essential to avoid reduced flow and potential overheating. We recommend inspecting impellers during scheduled maintenance and replacing them at the first sign of cracking, warping, or reduced flexibility.

Impeller Puller Tool

Removing an impeller can be a challenging task without the right equipment. The impeller puller is designed specifically to:

• Safely extract worn impellers without damaging the pump housing.

• Reduce maintenance time with an easy-to-use mechanism.

• Prevent costly repairs caused by improper removal techniques.

For operators managing fleets of Caterpillar-powered vessels, having a dedicated impeller puller on hand reduces downtime during service intervals.

Zinc Anodes for Caterpillar D336 Marine Engines

Galvanic corrosion is one of the greatest threats to marine cooling systems. Zinc anodes act as sacrificial protectors, ensuring the pump body, heat exchangers, and connected components are shielded from corrosive seawater effects.

Key Zinc Anode Features:

• Threaded NPT Sizes – Available in multiple sizes (¼”, ⅜”, ½”, ¾”, 1¼”) to match specific fittings.

• Various Lengths and Diameters – Designed for compatibility with D336 pumps and auxiliary cooling components.

• Corrosion Protection – Extends the life of bronze, copper, and steel components in contact with seawater.

By regularly replacing zincs, operators can prevent pitting, leaks, and premature equipment failure.

Silicone Coolant Hoses

Silicone hoses are an upgrade from traditional rubber hoses, offering enhanced durability and resistance to heat, pressure, and chemical exposure. Available in multiple internal diameters, they are essential for reliable circulation between the pump, heat exchanger, and engine block.

Benefits of Silicone Hoses:

• High Temperature Tolerance – Resistant to marine engine operating heat ranges.

• Flexibility – Maintains shape under pressure without cracking.

• Extended Service Life – Outlasts conventional rubber hoses in marine environments.

Diesel Pro Power supplies hoses in multiple diameters (from 1” to 4”), ensuring an exact fit for Caterpillar D336 configurations.

Hose Clamps for Caterpillar D336 Cooling Systems

Reliable clamps are critical to prevent leaks at hose junctions. Our selection includes a full range of adjustable clamps designed for coolant and fuel hoses.

Features:

• Stainless Steel Construction – Corrosion-resistant for marine conditions.

• Effective Diameter Ranges – Wide adjustment sizes to cover all hose diameters used on the D336.

• Secure Seal – Prevents leaks, reduces risk of overheating, and maintains system pressure.

Clamps should be checked during every inspection, as vibration and heat cycles can cause loosening over time.

Why Choose Diesel Pro Power for Caterpillar D336 Cooling Parts

When it comes to keeping your Caterpillar D336 operating at peak reliability, choosing the right supplier for cooling system components makes all the difference. Diesel Pro Power delivers a level of service, product quality, and global support that stands above the rest.

• 40,000+ Customers Worldwide – Our reputation is built on decades of trust. From commercial shipping companies to tugboat operators and offshore fleets, thousands of professionals rely on Diesel Pro Power to keep their Caterpillar D336 engines cool and dependable in the most demanding environments.

• Global Shipping to Over 180 Countries – No matter where your vessel operates, we deliver. With fast, trackable shipping, we ensure that pumps, impellers, zincs, hoses, and other vital cooling components reach you without delay, helping minimize costly downtime at sea or dockside.

• Comprehensive Marine Catalog in One Place – Instead of sourcing parts from multiple vendors, operators can find everything they need for the Caterpillar D336 cooling system in our catalog. From raw water pumps and impellers to zinc anodes, silicone hoses, clamps, and gaskets, every component is readily available and designed for marine conditions.

• Exclusive Marine & Industrial Focus – Unlike general suppliers who divide attention across automotive and consumer markets, Diesel Pro Power is dedicated solely to heavy-duty marine and industrial engines. This means our parts are selected and tested with the rugged needs of Caterpillar engines like the D336 in mind.

• Expert Technical Support – Beyond simply selling parts, we provide practical guidance. Our team assists with impeller sizing to ensure proper fit, offers advice on zinc replacement intervals to combat corrosion, and supports operators with troubleshooting for raw water pumps and cooling system performance.

By choosing Diesel Pro Power, Caterpillar D336 operators gain more than just parts—they gain a partner committed to keeping their vessels running safely and efficiently. With unmatched expertise, global reach, and a customer-first approach, we ensure that your D336 remains ready for long service life and dependable performance.

Maintenance Recommendations for the Caterpillar D336 Cooling System

To extend the life of your raw water pump and associated parts:

1. Inspect Impellers Every 6-12 Months – Replace at the first sign of wear.

2. Check Zinc Anodes Regularly – Replace when half their material is gone.

3. Examine Silicone Hoses for Soft Spots or Cracks – Replace as needed.

4. Tighten and Inspect Clamps – Ensure leak-free operation.

5. Flush Cooling System Periodically – Prevent salt and debris buildup.

These proactive steps reduce unplanned downtime and protect your Caterpillar D336 from costly overheating damage.