Water Inlet Connection 3934877 3903102 for Cummins1989-2002 6BT5.9 Diesel Engine

Water Inlet Connection 3934877 3903102 for Cummins

This water inlet connection, with OEM numbers 3934877 and 3903102, replaces the coolant inlet fitting on Cummins 6BT5.9 diesel engines.

Overview

The water inlet connection 3934877 3903102 is a direct replacement coolant inlet fitting for Cummins 6BT5.9 diesel engines from 1989 to 2002. This water inlet connection ensures proper coolant flow to prevent overheating. Built to OEM specifications, this water inlet connection restores the engine's cooling system integrity.

Built For Performance

• Cast-iron construction for durability and heat resistance
• Precision-machined sealing surfaces to prevent leaks
• Direct fit replacement with no modification required
• Corrosion-resistant coating extends service life
• Meets OEM dimensional and material standards

Fits These Machines

• for Cummins 6BT5.9 Diesel Engine (1989-2002)

On-The-Job Use

• Used in agricultural tractors powered by Cummins 6BT5.9
• Common replacement in marine and industrial generator applications
• Essential for heavy-duty truck engine cooling systems
• Frequently replaced during engine overhaul or coolant system repair

Specs At A Glance

Good To Know

Q: Does this water inlet connection include a gasket? A: No, the gasket is sold separately; we recommend using a new OEM-style gasket for proper sealing.

Q: Can this part be used on a 6BT5.9 engine modified with a different cooling system? A: It is intended for stock cooling system configurations; aftermarket modifications may affect fitment.

Slight variation in finish or dimensions may occur between production runs, and confirm compatibility before ordering.