icon-phone 619.235.0961    icon-email Email

When Downtime Is Not An Option.



Duramax 6.6l Turbo Diesel Repair Experts Point out Common Problems

Duramax 6.6l Turbo Diesel Repair Experts Point out Common Problems

Ever since the manufacture started back in 2001, the 6.6l Duramax has proven to be a reliable and durable choice for most owners. Many versions of this engine have been produced in the following 15 years, but they were all built upon the original. Every additional 6.6l Duramax produced builds upon its predecessor, perfecting and modifying the product to stay relevant in a very competitive market while meeting the ever-changing emission guidelines.

But not unlike most engines, the Duramax is known to suffer from a number of inherent problems. While some of these issues can be solved through modifications, sometimes 6.6l turbo diesel repair can prove to be a real challenge. The first step in this challenge is identifying the problem, and listed below are some of the most common ones.

Injectors for 6.6l Duramax Diesel are Known to Suffer from These Issues

The most common issues 6.6l Duramax fuel injector repair experts often point out is air getting stuck in the fuel lines and fuel starvation. The design of the filter housing is the cause, as Duramax does not utilize a pump. Instead, the engine operates by vacuuming the fuel from a tank with the help of an injection pump.

One of the most common problems with this design that 6.6l Duramax fuel pump repair experts point out is that, over time, a crack tends to develop in the fuel filter. Another common issue occurs when air is drawn in due to bad housing. Once air is introduced to the system, getting the fuel system operational can pose a challenge.

Overheating is a Common Occurrence Some Users Experience

Another issue often reported is related to overheating. This problem does not affect all users, and indeed while some customers experience overheating, others never do. However, this issue is more common with Duramax than other types of engines, which is why it is best to contact an expert in the event your engine experiences this.

It usually occurs during hot summer days and most commonly affects models older than 2005. The issue has largely been fixed in models produced after 2006 by adding a larger radiator unit, as well as a fan. Overheating often occurs due to a failure in the fan clutch, which keeps the fan from providing additional airflow used to cool the engine.

Another cause can be traced to a dirty or a clogged radiator, as the waste reduces its efficiency. Finally, another likely cause for overheating can be a faulty water pump.

Faulty Glow Plug Can Lead To a Disaster

One of the most common concerns users of the 2006 model have been experiencing is glow plug failure. Fortunately, that fault has long been eliminated with all subsequent models. The problem occurs when the glow plug module over-cycles the glow plug. As a result, the tip of the plug deforms and breaks off inside the engine. In this case, catastrophic engine damage was likely to occur. Fortunately, the manufacturer acknowledged the issue and has since eliminated the risk.


6.6l Duramax replacement instructions can be confusing! Consult an Expert!

Boasting over forty years of experience, PCE San Diego is the leading Duramax 6.6l Turbo Diesel Repair expert serving the San Diego area. We guarantee nothing but thorough service and complete satisfaction provided by mechanics with the highest level of expertise. If you need any help with your 6.6l Duramax, do not hesitate to get in touch with our friendly agents.


  1. Make Contact
Please enter a name.
Please enter a valid email address.
Please enter a valid phone number.
Invalid Input
Invalid Input
I Would Like More Information About:

Invalid Input
Send me your newsletter:

Invalid Input

Our Guarantee

At PCE, we pledge to provide you with the highest level of integrity and expertise; to recommend only what’s good for you and your situation; to use all resources possible to minimize downtime; to give the best value for your dollar; and to stand by our work and our word.

Contact Us

Corporate Headquarters
1620 Rigel Street
San Diego, CA 92113
Phone: (619) 235-0961
Fax: (619) 233-5096 
Diesel & Motor Division
3376 Main Street
San Diego, CA 92113
Phone: (619) 235-0961
Fax: (619) 687-0038 
99-1221 Halawa Valley Street
Aiea, HI 96701-3281
Phone: (808) 486-6600
Fax: (808) 845-1652 
920 West Marine View Drive
Everett, WA 98201-1300
Phone: (425) 257-9065
Fax: (425) 259-6851