Conquer the Cold: 1000W Block Heater for International Navistar 6.9L & 7.3L Diesel

Don't let a frozen engine stop your workhorse. The 6.9L and 7.3L V8 diesels are legendary engines, but they need help when the temperature drops. This Heavy-Duty 1000W Freeze Plug Heater is the ultimate solution for cold weather reliability. Manufactured in Canada using industrial-grade materials, this heater keeps your coolant warm, ensuring smoother startups, reduced strain on your starter/batteries, and significantly less engine wear during those harsh winter mornings.

Why Choose This Block Heater?

• High-Efficiency Heating: As a freeze plug (immersion) heater, the copper element sits directly in the coolant. This is the most efficient type of engine heater available, far superior to magnetic or stick-on pads.
• Powerful 1000W Output: With 1000 Watts of power (120V), this unit generates substantial heat to combat extreme freezing conditions, ensuring your massive V8 diesel is ready to fire up.
• Industrial Build Quality: Made in Canada. Features a robust Nickel Plated Solid Brass body and a high-quality Copper Element for maximum heat transfer and corrosion resistance.
• Engine Protection: Cold starts are the leading cause of engine wear. By warming the block before you turn the key, you ensure oil flows easier and internal clearances are closer to operating spec immediately.
• Ready to Install: Functions as a direct OEM replacement for many applications. Includes the necessary power cord for a complete setup.

Vehicle & Engine Fitment

This heater is sized specifically for the following engines:

Specifications

• Wattage: 1000W
• Voltage: 120V
• Diameter: 1 1/2"
• Material: Nickel Plated Solid Brass / Copper
• Included: Heater Element & Power Cord

Invest in reliable starts and protect your diesel engine this winter.

International / Navistar IDI Diesel Engine Production Years

6.9L V8 IDI Diesel

• Produced: 1983–1987

• Introduced as Ford’s first light-duty diesel V8

• Naturally aspirated, indirect injection (IDI)

7.3L V8 IDI Diesel

• Produced: 1988–1994

• Evolution of the 6.9L with increased displacement

• Available in naturally aspirated and factory turbocharged versions

• Still indirect injection (not Power Stroke)

Vehicles Commonly Equipped with These Engines

• Ford F-Series Trucks: F-250 and F-350 (1983–1994)

• Ford E-Series Vans: E-250 and E-350 (1983–1994)

• Ford Bronco: Limited availability (early years, non-turbo)