Gates 42118 Engine Water Pump

Gates Water Pump for Isuzu Applications

The Gates 42118 engine water pump is built for Isuzu Pickup, Amigo, Impulse, and Trooper applications that use an accessory belt drive. It combines a cast aluminum housing with a cast iron impeller for dependable coolant circulation and OE-quality fit.

Gates Water Pump (Standard) parts are built for consistent operation, with premium materials and testing focused on seals, bearings, and leakage performance. This makes the Gates 42118 a practical replacement for drivers servicing cooling system wear on select Isuzu models.

Key Features

• Cast aluminum housing for durable cooling system service
• Cast iron impeller with standard rotation
• Accessory belt driven design
• Includes water pump and gasket
• No back housing, thermostat housing, fan clutch, or pulley included
• Not timing belt driven

Detailed Product Overview

This engine water pump is engineered for direct replacement on 1986-1995 Isuzu Pickup, 1989-1993 Isuzu Amigo, 1988-1989 Isuzu Impulse, and 1986-1987 Isuzu Trooper applications. The Gates 42118 uses a cast aluminum body and cast iron impeller to support coolant flow through the engine cooling system while maintaining the correct standard impeller rotation for the listed vehicles.

This part cross-references Airtex AW9105 and GMB 140-1220 for the same application.

Common Problems This Part Can Address

• Coolant leakage from a worn pump seal
• Noise from worn pump bearings
• Reduced coolant circulation from impeller wear
• Overheating caused by pump failure
• Cooling system service needs on high-mileage Isuzu Pickup, Amigo, Impulse, or Trooper models

Installation Notes and Tips

Verify accessory belt drive configuration before installation. Replace the gasket during service and inspect the belt, hoses, and surrounding cooling system components for wear or contamination. Confirm that the replacement pump matches the original housing style and impeller rotation for your vehicle.

Quality Assurance

Gates states that its water pumps are built with premium alloy materials and undergo functional testing of seals and bearings, along with leakage testing of the casting and assembled pump, to support reliable operation and OE-quality fit.