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What year Duramax have injector Problems?
What year Duramax has injector problems? The LB7 Duramax built from 2001 – 2004.5 is known for injector failure. The good news is the replacement injectors you purchase from us incorporate several updates to help prevent repeat failures.
How often do LB7 injectors go out?
The biggest issue with ’01-to-’04 and 1/2 LB7 engines is their fuel injectors’ propensity to fail, typically before an engine reaches 100,000 miles.
Duramax LB7 Injector Failure Explained – Diesel Insights
Images related to the topicDuramax LB7 Injector Failure Explained – Diesel Insights
How long should LB7 injectors last?
For most buyers the first set of injectors will likely have already been taken care of since the failure usually occurs between 100,000 and 150,000 miles.
What year LB7 is the best?
LB7: 2001 – 2004
It’s still highly popular in the used market. Other than LB7 engines sold in California, these engines didn’t include any emission control devices. The lack of these extra emissions parts made the engines highly reliable.
Is the LB7 the best Duramax?
The LB7 is the best Duramax engine because it is more powerful and reliable than the other models. It was released in 2001 and had upgrades in 2003 and 2004. The LBZ is the most reliable and trouble-free Duramax engine.
How do I know if my LB7 needs injectors?
There is a multitude of symptoms your truck will experience if the injectors are going bad. One of the first signs we see are excessive smoke/haze. You will notice your truck billowing out a little more smoke than usual or hazing at idle. Another issue you may notice is high EGTs.
How can you tell if injectors are going bad on a Duramax?
- Excessive Smoke.
- Power Loss.
- Rough Idle.
- Fuel in Oil.
- High Return Fuel.
- No Start.
See some more details on the topic Do all LB7 have injector issues? here:
Do all LB7 engines have an injector problem eventually
It has been discussed over and over again about the newer injectors having better internals. Ball seats seem to corrode on most older versions.
LB7 Injector Issues? | Chevy and GMC Duramax Diesel Forum
Yes, the injectors were a issue in the LB7 and yes there are plently of LB7’s running around that have never had injector issues.
Bad LB7 Injectors? Do the Job Right The First Time!
The LB7 Duramax has a history of injectors going bad, but there is a right way to get the job done the first time.
The 5 Most Common LB7 Duramax Engine Problems – 6.6L …
The LB7 injectors had two potential design flaws that could cause injector failure. The first has to do with the internal ball seat inside …
How can you tell if you got a bad injector?
- Check Engine Light Illuminates Solid or Flashes. One of the engine issues that can cause the check engine light to come on or flash is a dirty or malfunctioning fuel injector. …
- Rough Idling/Irritating Idle Noise. …
- Engine Misfiring. …
- Fuel Leaks.
Are LB7 injectors hard to replace?
Registered. It’s not hard at all, the only hard part is remembering where everything goes when you put it back together, if you can remember where the bolt’s go it will be easy.
How reliable are LB7 Duramax?
LB7 Duramax Reliability
The LB7 is a great engine, when it is stock. The block and internals are plenty capable of lasting 350,000+ miles. Most of the injector issues and head gasket faults should be fixed in these trucks now given their age.
Duramax Diesel LB7, LBZ, LLY Fuel Injector – Signs of Failure, GM Common Rail Fuel Injectors
Images related to the topicDuramax Diesel LB7, LBZ, LLY Fuel Injector – Signs of Failure, GM Common Rail Fuel Injectors
What problems do LB7 Duramax have?
The fuel injectors in the LB7 engine have a design flaw that causes them to fail. Signs you’re truck is suffering from this flaw include a misfiring engine, rough idling, acceleration and performance issues, and error codes that indicate the fuel mixture is too rich or too lean.
Is LB7 a good motor?
Is The Lb7 A Good Motor? In a stock engine, the LB7 is very reliable. With enough power and good materials, you can last over 350,000 miles with your block and internals. These trucks are now three or four decades old and have most injector issues, head gasket problems, and clutch problems.
What’s better LBZ or LB7?
The LB7 – stronger internals, injector issues, and 5 speed trans. The LLY – stronger internals, headgasket/overheating issues, but no injector issues, and 5 speed trans. The LBZ – weaker internals (pistons are weaker), but no injector/overheating/headgasket issues. Also get the 6 speed.
What are most reliable years of Duramax?
LLY/LBZ from 2006 to 2007 is considered one of the most reliable and rugged engines from the pre-emission’s era. They are widely sought out for because of this and can be a great buy if you are looking for a Duramax engine of this time.
Is the LB7 or LLY better?
The LB7 was the simplest in terms of emissions controls, while the LLY came with the largest turbocharger ever offered. The LBZ packed a host of improvements, including considerably more power, and the LMM was nearly a mirror image of it aside from its use of a diesel particulate filter.
Are LB7 fast?
Motor work it is a very fast truck the lb7 is the fastest motor of all the duramax motors.
What do I need to know about LB7 Duramax?
| Production | ’01-’04 | Cast aluminum, six 14mm diameter head bolts per cylinder (with sharing) |
|---|---|---|
| Displacement | 6.6L (403ci) | Bosch CP3 |
| Compression Ratio | 17.5:1 | IHI RHG6 fixed geometry (with wastegate) |
| Block | Deep-skirt, cast iron (gray iron alloy) | Air-to-air |
| Rods | Forged steel, fractured | 300hp at 3100 rpm |
How much does it cost to replace injectors on a Duramax?
The total cost to have a mechanic replace 8 injectors on an LLY Duramax can range from $3500 – $4500 CAD, depending on what other work is performed at the same time. The good news is LLY injectors are located outside the valve covers so the task is considerably easier and cheaper than on prior LB7 models.
What causes Duramax injectors to go bad?
Armed with this empirical evidence, we concluded that fuel contaminants that should be caught by the system’s filter were the cause of the Duramax’s high-tech injectors’ demise.
LB7 Duramax INJECTOR CUPS. Everything you need to know. How they fail and how to install.
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Do Duramax injectors need to be programmed?
*NOTE* These injectors have TRIM (IQA) CODES that will need to be programmed into the ECM with a Scan Tool.
What should balance rates be on LB7?
GM states that balance rates should be no more than plus or minus 4 (+4/-4) in park at operating temperature. Unfortunately balance rates do not always provide a 100% accurate diagnosis of the injector’s performance due to numerous variables present in the engine.
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