Does the 6.6 Duramax have glow plugs?
Yes, the 6.6 Duramax diesel engine does have glow plugs. Glow plugs are an essential component in diesel engines, including the 6.6 Duramax, to aid in cold-weather starting and improve engine performance.
What are Glow Plugs?
Glow plugs are heating elements installed in the cylinders of a diesel engine. When the engine is cold, the glow plugs heat up to help vaporize the diesel fuel, making it easier to ignite and start the engine. This is particularly important in cold weather conditions when the diesel fuel can be more difficult to ignite.
How Do Glow Plugs Work in the 6.6 Duramax?
In the 6.6 Duramax engine, the glow plugs are controlled by the engine's electronic control module (ECM). When the engine is started in cold conditions, the ECM activates the glow plugs, allowing them to heat up for a few seconds before the engine is cranked. This pre-heating of the cylinders helps the diesel fuel ignite more easily, resulting in a smoother, quicker start.
The glow plugs in the 6.6 Duramax continue to operate for a short time after the engine has started, further aiding in the combustion process and improving engine performance, especially during the warm-up period.
Importance of Glow Plugs in the 6.6 Duramax
Glow plugs play a crucial role in the 6.6 Duramax engine, particularly in cold weather conditions. Without functioning glow plugs, the engine may be difficult to start, run rough, or even fail to start at all. Proper maintenance and replacement of the glow plugs is essential for optimal 6.6 Duramax engine performance.
In summary, the 6.6 Duramax diesel engine is equipped with glow plugs, which are essential for cold-weather starting and overall engine performance. The glow plugs are controlled by the engine's ECM and play a vital role in the combustion process, especially during the engine warm-up period.
Does a 6.6 Duramax have glow plugs?
I would call is a 12 mm. There we go got the old glow plug. Out.
How to check glow plugs on 6.6 Duramax?
Okay take your voltmeter. And set to DC volts. Attach one lead to good. Ground. Now put the other lead onto any contact in either of these connectors.
What year to avoid 6.6 Duramax?
Years to avoid for the 6.6L Duramax include 2004.5–2005 (LLY) due to overheating and 2011–2016 (LML) because of the high-pressure fuel pump (CP4) failure, which can destroy the entire fuel system. Other problematic years are 2001–2004 (LB7) for injector issues and 2025–present (LZ0) due to thrust bearing problems.
This video explains the common problems and reliability of the Duramax LML: 58s8020 AutomotiveYouTube · Feb 14, 2023
Engine years to avoid
- LB7 (2001–2004): Prone to injector failures, which are expensive to fix.
- LLY (2004.5–2005): Known for overheating issues, especially when towing.
- LML (2011–2016): The CP4 fuel pump is a significant weak point, and its failure can be catastrophic, leading to costly repairs for the entire fuel system. These models also have complex emissions systems.
- LZ0 (2025–Present): Newer 3.0L versions have reported thrust bearing failures, excessive crankshaft play, and resulting oil pressure issues. See this YouTube video for more details.
Years with potential issues
- LBZ (2006–2007): While considered reliable, some years have had turbo and wiring harness issues, though these are generally manageable.
- L5P (2017–Present): While generally good, some models may have issues with the MAP sensor or other emissions components. See this YouTube video for more details.
Recommended years
- LBZ (2006–2007): Often considered the most reliable year due to its powerful performance and less complex emissions systems.
- L5P (2017–Present): A modern, powerful engine, but some models may require extra maintenance for emissions systems.
Does a 6.7 diesel have glow plugs?
Eight glow plugs, one per cylinder.
