CUMMINS 3912086 OEM HEATER TUBE (OUTER) – 5.9L 12-VALVE (1989–1998)

Product Description

The CUMMINS 3912086 OEM HEATER TUBE (OUTER) is designed for 1989–1998 5.9L 12-Valve Cummins diesel engines. This genuine Cummins cooling system component is built to provide proper coolant routing between engine cooling system components while maintaining OE fitment, durability, and reliability.

Use this part when repairing coolant leaks, replacing corroded heater tubes, servicing the cooling system, or performing engine restoration work. Always verify fitment by year, make, model, engine, and engine serial number before ordering.

FEATURES

• Genuine Cummins OEM outer heater tube
• Designed for 1989–1998 5.9L 12-Valve Cummins applications
• Direct-fit replacement cooling system component
• Helps maintain proper coolant circulation
• Constructed to Cummins OEM specifications
• Recommended for cooling system repairs and restorations

FITMENT

• 1989–1993 Dodge Ram 2500/3500 5.9L Cummins
• 1994–1998 Dodge Ram 2500/3500 5.9L Cummins 12-Valve
• Select Cummins 5.9L industrial and agricultural applications

WHAT'S INCLUDED

• 1 Cummins 3912086 OEM Heater Tube (Outer)

CROSS-REFERENCE AND RELATED PRODUCTS

• Cummins 3912086
• Related heater tube and coolant transfer components
• Cooling system hoses and clamps

SPECIFICATIONS

• Manufacturer: Cummins
• Part Number: 3912086
• Part Type: Heater Tube (Outer)
• 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 heater tube fits the applications listed above. Always verify your year, make, model, engine, and engine serial number before ordering.

Is this a direct replacement?

Yes. Cummins 3912086 is designed as a direct-fit OEM replacement heater tube for the listed applications.

What is included?

This listing includes one Cummins 3912086 OEM outer heater tube.

What does the heater tube do?

The heater tube routes engine coolant through portions of the cooling and heating system to help maintain proper operating temperatures.

When should this heater tube be replaced?

Replacement is recommended if the tube becomes corroded, damaged, leaking, or restricted from internal buildup.

Do I need any related parts?

Inspect coolant hoses, clamps, fittings, seals, thermostat components, and related cooling system parts during installation and replace worn components as necessary.