1. Autos

Your suggestion is on its way!

An email with a link to:


was emailed to:

Thanks for sharing About.com with others!

DIY: How to Replace Your Diesel Glow Plugs
Diesel engines do not have spark plugs or ignition system of any kind. So it is up to the glow plugs to get it going when the engine is cold or it's cold out.
 More of this Feature
• What You Will Need
General information
Design Of Glow Plugs
Before You Start
 Join the Discussion
Convert from R-12 to R-134a
Radiator Coolent Replacement 101
 Related Resources
The Diesel Engine
Diesel vs Gasoline Engines
Auto Repair Glossary: DIESEL ENGINE
 From Other Guides
Rudolf Diesel
Offroad War Stories
2004 Acura TSX Test Drive
2005 Chevrolet Colorado XTREME
 Elsewhere on the Web
Motor Trend Magazine
Car And Driver Magazine

What you will need:

  1. Ratchet wrench set with deep sockets and universal joint
  2. Screwdrivers
  3. Six point combination wrenches (1/4", 5/16" 3/8" 7/16 and 1/2")
  4. For GM; a J 39083 Glow Plug Connector Remover and Installer
  5. Glow plug chamber reaming tool (Mercedes Benz or if required)
  6. Valve cover gaskets (if required)
  7. Penetrating lubricant

Why replace your Glow Plugs?

Diesel glow plugs live a hard life. They are subject to extreme temperature changes and high combustion pressures. Since a diesel engine may have as many as 10 glow plugs, one for each cylinder, you may not notice when one goes bad. But if two, three or more go bad; you will notice the engine has become very difficult to start.

Some vehicles have PCM's that monitor glow plug operation; most just use a Glow Plug Relay so you may not know you have any bad glow plugs.

Next page> General information > Page 1, 2, 3, 4

Additional information provided courtesy of ALLDATA

© 2003 - 2004 Vincent T. Ciulla

©2016 About.com. All rights reserved.