Autolite 1109 Diesel Glow Plug

Reliable Diesel Glow Plug for Buick, Cadillac, Chevrolet, and More

The Autolite 1109 diesel glow plug is engineered to provide consistent pre-heating performance for a range of GM vehicles. Designed with copper material and a .250" spade connector, this glow plug supports efficient cold starts in diesel engines.

• Connector Type: .250" spade for secure electrical connection
• Glow Plug Material: Copper for effective heat conduction
• Glow Plug Rating: 68 watts at 10.5 volts
• Hex Size: 9.5mm for easy installation and removal
• Overall Length: 3.23" (82mm) suitable for specified engine designs
• Pre-Heating Time: Approximately 10 seconds for quick engine start
• Thread Size: 10mm x 1.0 for proper fitment

Durable Design and Precise Specifications

The Autolite 1109 glow plug is constructed from copper, a material known for its excellent thermal conductivity, ensuring rapid and uniform heating. With a 68-watt rating at 10.5 volts, it delivers the necessary heat output to assist diesel engines during cold starts. The 9.5mm hex size and 10mm x 1.0 thread size provide compatibility with a variety of GM diesel models, including Buick, Cadillac, Chevrolet, Oldsmobile, and Pontiac vehicles. Its overall length of 3.23 inches (82mm) fits engine configurations requiring this specific dimension.

Compatible Vehicles and Applications

This glow plug is compatible with multiple GM makes and models, including but not limited to:

• Buick Century, LeSabre, and Regal
• Cadillac DeVille, Eldorado, Seville, and Fleetwood
• Chevrolet Caprice, El Camino, Impala, and Monte Carlo
• Oldsmobile Cutlass Calais, Cutlass Ciera, and Delta 88
• Pontiac Bonneville, Grand Prix, and Firebird

It is designed to improve cold start reliability and reduce engine wear in diesel-powered vehicles.

Common Issues Addressed by Autolite 1109 Glow Plug

• Difficulty starting diesel engines in cold weather
• Extended pre-heating times causing delayed ignition
• Uneven or insufficient heat generation in combustion chambers
• Glow plug failure leading to rough idling or misfires
• Corrosion or wear from prolonged use in harsh conditions

Installation Notes and Tips

When installing the Autolite 1109 glow plug, ensure the engine is cool to prevent damage. Use a 9.5mm socket for proper torque application and avoid overtightening. Verify the thread size (10mm x 1.0) matches the engine specifications. Connect the .250" spade terminal securely to maintain reliable electrical contact. It is recommended to inspect and replace glow plugs in sets to maintain balanced engine performance.

Quality Assurance and Warranty

Autolite manufactures the 1109 glow plug to meet OEM standards for fit and function. The copper construction and precise specifications contribute to consistent performance and durability. While specific warranty details may vary, Autolite products typically come with a limited warranty against manufacturing defects. Consult product documentation or authorized sources for exact warranty terms.