CUMMINS 3912087 OEM INNER HEATER TUBE – RAM 5.9L 12V (1989–1998)

Product Description

The CUMMINS 3912087 OEM INNER HEATER TUBE is designed for 1989–1998 5.9L 12-valve Cummins diesel engines. This genuine Cummins cooling system component routes engine coolant through the heater circuit while maintaining proper fitment, durability, and reliability.

Use this part when repairing coolant leaks, replacing damaged heater tubing, restoring the factory cooling system, or during engine service work. Always verify fitment by year, make, model, engine, and part number before ordering.

FEATURES

• Genuine Cummins OEM inner heater tube
• Designed for 1989–1998 5.9L 12-valve Cummins applications
• Maintains proper coolant flow through the heater circuit
• Direct-fit replacement for factory heater tube assemblies
• Built for long service life and reliable cooling system operation
• Ideal for repair, restoration, or maintenance work

FITMENT

• 1989–1993 Dodge Ram D/W Series 5.9L Cummins 12V
• 1994–1998 Dodge Ram 2500 5.9L Cummins 12V
• 1994–1998 Dodge Ram 3500 5.9L Cummins 12V
• Select Cummins 5.9L industrial and commercial applications

WHAT'S INCLUDED

• 1 Cummins 3912087 OEM Inner Heater Tube

CROSS-REFERENCE AND RELATED PRODUCTS

• Cummins 3912087
• Related heater hose components
• Cooling system service and maintenance parts

SPECIFICATIONS

• Manufacturer: Cummins
• Part Number: 3912087
• Part Type: Inner Heater Tube
• Engine Compatibility: 5.9L 12-Valve Cummins
• Fitment Years: 1989–1998
• Vehicle Application: Dodge Ram 2500 / 3500
• Condition: New
• Quantity: Sold Individually

FAQ

Will this part fit my truck?

This part fits the applications listed above. Always verify your year, make, model, engine, and part number before ordering.

Is this a direct replacement?

Yes. Cummins 3912087 is designed as a direct-fit OEM replacement inner heater tube for the listed applications.

What is included?

This listing includes one Cummins 3912087 OEM inner heater tube.

What does the inner heater tube do?

The inner heater tube helps route engine coolant through the heater circuit, allowing proper heater operation and coolant circulation.

When should this heater tube be replaced?

Replacement is recommended if the tube is corroded, leaking, damaged, or being serviced during cooling system repairs.

Do I need any related parts?

Inspect heater hoses, hose clamps, coolant fittings, gaskets, and related cooling system components during installation and replace worn parts as necessary.