The Car Care Clinic with the Dr John

83 Chevy Suburban - Glow Plugs

Question

I need to change the glow plugs in my '83 Chevy Suburban. Are there any special procedures or precautions that I should know before doing this?

Answer

Be sure to blow any debris away from the area of the glow plugs before removing. Anything falling into the glow plug port can be devastating to your engine and checkbook. If the glow plugs are rusted and refuse to turn, start the engine and try turning the glow plugs as the engine heats up. Always install a complete set; the controller relies on the glow plug's internal resistance to control operation. Before they're installed, lightly coat the threads with anti-seize and do not over tighten.

Good Luck!
Dr. John