Caterpillar 3508B Raw Water Pump & Marine Cooling System Components

The Caterpillar 3508B is a powerhouse V8 engine designed for heavy-duty marine applications where reliability and cooling efficiency are absolutely essential. A properly functioning raw water pump and cooling system keeps the engine operating within safe temperature ranges, preventing overheating and ensuring continuous performance under load. Diesel Pro Power provides a complete selection of aftermarket Caterpillar 3508B marine cooling system parts—trusted by more than 40,000 customers worldwide and shipped to over 180 countries.

Below you will find our dedicated catalog for Caterpillar 3508B raw water pumps, impellers, zinc anodes, hoses, and clamps—everything you need to maintain and extend the life of your cooling system.

Marine Water Pump for Caterpillar 3508B

The raw water pump is the heart of the Caterpillar 3508B’s cooling system. Built to circulate seawater through heat exchangers, this pump ensures consistent cooling under the harshest marine operating conditions.

• Heavy-duty marine-grade construction

• Designed to fit Caterpillar 3508B engines precisely

• Includes port C-clamps for secure installation

• Delivers reliable seawater flow to protect against overheating

This replacement pump is engineered for durability in saltwater environments, offering dependable performance and extended service life.

Impeller for Caterpillar 3508B Marine Water Pump

The impeller is a critical wear component inside the raw water pump. Over time, blades can stiffen, crack, or wear down, reducing water flow and risking engine overheating.

• High-quality bronze construction for resistance to corrosion

• 20-blade design optimized for consistent water movement

• Easy to install during scheduled maintenance or pump rebuilds

By replacing the impeller at recommended intervals, operators can avoid costly downtime and maintain the cooling system at peak efficiency.

Zinc Anodes for Caterpillar 3508B Cooling Systems

Marine environments expose cooling systems to galvanic corrosion, but zinc anodes protect metal surfaces inside the pump and heat exchangers by acting as sacrificial elements. Replacing zincs regularly is essential for engine longevity.

Available sizes for Caterpillar 3508B marine engines:

• Compact zincs with 1/4” NPT threads – ideal for smaller fittings

• Medium zincs with 3/8” and 1/2” NPT threads – versatile protection for standard cooling lines

• Large zincs with 3/4” and 1-1/4” NPT threads – heavy-duty coverage for high-capacity systems

Each zinc is manufactured to precise specifications, ensuring a proper seal and maximum corrosion resistance.

Silicone Coolant Hose for Caterpillar 3508B

High-performance silicone coolant hoses deliver durability and flexibility where standard rubber hoses can fail.

• 4” inside diameter – designed for Caterpillar 3508B marine cooling systems

• Heat-resistant and reinforced construction

• Sold in convenient 1-foot lengths for easy customization

Silicone hoses last longer than traditional hoses and resist cracking, hardening, and saltwater exposure, making them an excellent upgrade for demanding marine operations.

Hose Clamps for Caterpillar 3508B Cooling Systems

Hose clamps keep coolant and seawater lines secure under pressure, preventing leaks that can compromise engine cooling. Diesel Pro Power offers a full range of clamps to match Caterpillar 3508B configurations:

• Fuel and coolant clamps with small effective ranges for tight-fitting lines

• Medium-range clamps for coolant hoses requiring extra flexibility

• Heavy-duty clamps designed for larger diameter hoses, ensuring leak-free operation even under vibration and load

Each clamp is designed to withstand the harsh marine environment and provide a secure, long-lasting connection.

Why Maintain the Caterpillar 3508B Cooling System?

A Caterpillar 3508B is a significant investment, and protecting it means keeping the cooling system in top condition. Overheating can cause warped cylinder heads, gasket failures, or even catastrophic engine damage. Routine maintenance—replacing impellers, monitoring zincs, inspecting hoses, and upgrading clamps—keeps the cooling system efficient and prevents costly downtime.

Why Choose Diesel Pro Power for Caterpillar 3508B Cooling Parts?

• Trusted Worldwide – Over 40,000 customers, from tugboats to offshore fleets

• Global Reach – Shipping to more than 180 countries with fast, trackable service

• Complete Marine Catalog – Pumps, impellers, zincs, hoses, clamps, gaskets, and more in one place

• Marine & Industrial Specialization – No distractions from automotive parts—only heavy-duty solutions

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

By sourcing Caterpillar 3508B raw water pumps and cooling system parts from Diesel Pro Power, operators gain reliability, cost savings, and peace of mind knowing every part is engineered for demanding marine environments.