Caterpillar 3116 Engine Water Pump & Cooling System Parts Catalog

The Caterpillar 3116 is a durable, mid-range diesel engine widely used in construction equipment, marine vessels, industrial applications, and heavy-duty trucks. Like all high-performance diesel engines, it relies on a properly functioning cooling system to maintain safe operating temperatures. At the heart of that system is the engine water pump, responsible for circulating coolant throughout the engine block, cylinder head, and radiator.

At Diesel Pro Power, we supply a complete range of Caterpillar 3116 water pumps, silicone coolant hoses, clamps, and gauges to keep your cooling system running reliably. With over 40,000 satisfied customers in more than 180 countries, we’ve built a reputation for quality aftermarket replacement parts, fast worldwide shipping, and expert support.

Engine Water Pumps for Caterpillar 3116

Engine Water Pump for Caterpillar 3114, 3116, 3126, and C7

This water pump is a versatile replacement option compatible with multiple Caterpillar mid-range engines, including the 3114, 3116, 3126, and C7. Many operators with mixed fleets appreciate a cross-compatible part that can fit multiple engines, minimizing downtime and simplifying inventory.

A properly functioning water pump ensures constant coolant circulation, preventing overheating under heavy load. If your engine has been running hotter than usual, producing steam, or showing coolant leaks around the front of the block, a failing water pump may be the cause. Replacing it restores full cooling efficiency and helps extend the lifespan of vital engine components.

Engine Water Pump for Caterpillar 3116 Engines

For owners who need a pump specifically built for the Caterpillar 3116 engine, this direct replacement is the best choice. It is engineered to meet the performance requirements of the 3116, ensuring correct flow rate and pressure. Many marine operators prefer dedicated 3116 replacements when engine load is constant and reliability is paramount.

Coolant Hoses for Caterpillar 3116

Silicone coolant hoses play a crucial role in the cooling system, connecting the water pump, radiator, expansion tank, and bypass lines. Unlike standard rubber hoses, silicone hoses resist cracking, high temperatures, and long-term wear, making them the industry-preferred option for demanding diesel applications.

We offer Caterpillar 3116 hoses in a wide range of diameters, ensuring a proper fit for every coolant routing application. Each hose is sold in one-foot lengths, making it simple to order the exact amount you need.

Common Sizes Available

• 1" Inside Diameter – A flexible option often used for bypass or smaller coolant passages.

• 3/4" Inside Diameter – Compact size, suitable for auxiliary connections.

• 1 3/4" Inside Diameter – Common in radiator return lines and medium-flow connections.

• 1 7/8" Inside Diameter – Ideal for slightly larger connections where a tight seal is needed.

• 2" Inside Diameter – Used in higher-flow sections of the cooling loop.

• 2 1/8" and 2 1/4" Inside Diameter – Caterpillar engines often use intermediate hose sizes, which is why we stock these unique dimensions.

• 2 1/2" Inside Diameter – Handles substantial coolant movement between components.

• 2 3/4" Inside Diameter – Common for larger radiator outlet or inlet pipes.

• 3" Inside Diameter – A heavy-duty size, often used in marine applications where engines are under constant load.

• 3 1/2" Inside Diameter – Typically used in intercooler or aftercooler lines.

• 4" Inside Diameter – The largest standard coolant hose size available, suited for maximum flow in oversized applications.

Each hose is reinforced for durability, designed to withstand temperature extremes, and compatible with both coolant and water-based systems.

Hose Clamps for Caterpillar 3116

Even the most durable hose is only as secure as the clamp holding it in place. Diesel Pro supplies a complete range of coolant and fuel hose clamps designed to maintain tight seals and prevent leaks, even under vibration and thermal expansion.

Key Clamp Options

• Small Hose Clamps (Effective Range 9/16" to 1-1/16") – Perfect for smaller hoses in auxiliary coolant lines or fuel applications.

• Medium Hose Clamps (11/16" to 1-1/4") – Common for mid-size coolant connections.

• Heavy-Duty Hose Clamps (13/16" to 1-3/4") – Designed for larger lines carrying significant coolant flow.

• Specialty Fuel & Coolant Clamps (1" to 1.5") – Secure for both coolant and low-pressure fuel lines.

• Large Hose Clamps (1-5/16" to 2-1/4") – Ideal for radiator hoses and high-flow passages.

• Extra-Large Clamps (1-9/16" to 2-1/2" and 2-5/16" to 3") – Provide maximum holding power for oversized hoses, essential in marine and industrial engines that run continuously at high loads.

Each clamp is manufactured for durability, ensuring a leak-free connection that stands up to vibration, heat cycles, and pressure changes.

Gauges for Monitoring Cooling System Performance

No water pump or hose can function effectively without proper monitoring. That’s why Diesel Pro also offers mechanical and electrical gauges compatible with Caterpillar 3116 engines.

Available Gauge Types

• Mechanical Gauges (Standard or with Alarm) – Provide direct readings of engine temperature and pressure. Versions with built-in alarms alert operators when levels exceed safe ranges.

• Electrical Gauges (12-Volt and 24-Volt) – Perfect for marine and industrial applications where dashboard monitoring is critical. Available for both 12V and 24V systems to fit your specific application.

By pairing new water pumps and hoses with accurate gauges, operators can maintain full confidence in their cooling system’s health.

Why the Water Pump Matters in a Caterpillar 3116

The Caterpillar 3116 produces significant heat under heavy load. Without proper coolant circulation, the engine risks overheating, cracked cylinder heads, warped gaskets, and premature wear. The water pump ensures coolant moves through the block, head, radiator, and heat exchangers efficiently.

Signs of a failing water pump include:

• Coolant leaks near the pump housing

• Unusual whining or grinding noises from the pump bearings

• Engine overheating or fluctuating temperatures

• Visible corrosion or pitting on the pump impeller

Replacing the pump before total failure prevents costly downtime and protects engine integrity.

Why Choose Diesel Pro Power for Caterpillar 3116 Cooling Parts

• Proven Reliability – Over 40,000 satisfied customers trust us worldwide.

• Fast Shipping – Every order ships within 24 hours, with tracking provided.

• Engine-Specific Catalogs – All parts listed here are designed for the Caterpillar 3116 engine, with no guesswork.

• Aftermarket Durability – Diesel Pro aftermarket water pumps, hoses, and clamps are built for long service life under the toughest conditions.

• Expert Support – Our team of Caterpillar specialists provides guidance on installation, maintenance, and troubleshooting.