A new article in Consumer Reports has detailed common problems with the 2012 Duramax. We will look at issues like a failing CP4.2 injection pump, cracked pistons, and a snapped crankshaft. In addition, we will look at fuel-related problems. Hopefully, these new articles will help you decide whether or not you should purchase a new vehicle. In the meantime, read our articles about CP4.2 problems and fuel-related problems to learn about a faulty fuel injector.
CP4.2 injection pump failure
If you’ve been driving a 2011-2012 Duramax truck and notice your fuel pressure dropping, it might be a sign of a CP4.2 injection pump failure. These pumps are notorious for failing, but it doesn’t always mean that you should give up on your truck just yet. If you notice a sudden drop in gas pressure, you can try to prolong the life of your truck’s CP4.2 pump by replacing it with a lift pump. A lift pump is a high-pressure fuel pump, which was previously used in the Duramax engines from 2001 to 2010 and was renowned for its reliability. Diesel aftermarket specialists offer CP3 swap systems for CP4.2 trucks. The swap systems are relatively expensive, but offer the only real cure for CP4.2 failure.
Modern diesel engines rely on a high-pressure common-rail fuel delivery system to produce maximum power with the least amount of fuel. While the CP3 was the most reliable of the two, its successor, the CP4, doesn’t have the same level of reliability. In fact, some CP4.2 failures have occurred in GM trucks from 2011 to 2016.
Another problem with the CP4 injection pump is that it doesn’t flow as well as the CP3 and causes catastrophic fuel system failure. It also sends metal shavings throughout the fuel system, causing the vehicle to stall or require total replacement of the Duramax engine. Thankfully, this problem is relatively easy to diagnose and repair. Although the 2012 Duramax CP4.2 pump failure has caused many drivers to spend a significant amount of money replacing the pump, it’s also not a good idea to wait for the engine to fail and ruin the entire vehicle.
Another CP4 failure that has caused a lot of problems with these trucks is the use of poor quality fuel. This fuel lacks lubrication and may contain a small amount of water, which can damage the fuel pump. The pump can also fail when a roller lifter inside the unit spins sideways and cuts a groove into the camshaft. While there have been a lot of reports of these CP4 failures in online discussion forums, the true number of reported failures is likely to be higher.
There are plenty of reasons why you might encounter cracked pistons on your 2012 Duramax. Often the issue is related to the piston design. Many experts say that the LMM Duramax engine was introduced to meet new emissions requirements and was subject to this problem. These parts are known to cause cracked pistons. The LMM Duramax has been plagued with this problem for several years. Here are some solutions for your truck.
One of the main causes of cracked pistons on 2012 Duramax engines is faulty casting. Cast-aluminum pistons have a tendency to crack near the wrist pin center. These problems typically occur at high power levels. However, it has been known to happen on bone-stock HDs as well. Several factors have contributed to these failures, including high horsepower levels and poor quality castings from suppliers.
Firstly, you should replace the filter head. You can rebuild the filter head, but it will not solve the problem. If the pistons are cracked, you will need to replace the filter head. The aluminum cylinder heads are not affected by this problem. But the Nox sensors are affected by the problem. Secondly, if you have a 2012 Duramax with cracked pistons, you must replace the fuel filter.
Another cause of cracked pistons on your 2012 Duramax is a failed injector. The fuel pump is another common component that is susceptible to failure. Most commonly, it fails because the injector ball seat is corroded. A newer model has a hardened ball seat, which prevents this problem and ensures proper engine performance. But there is no guarantee that this repair will be effective.
The other problem may be the LBZ pistons. These pistons were designed for more power and therefore had a higher risk of cracking. However, it is unlikely to happen on a stock engine, since LMM pistons are capable of producing over 600whp. Consequently, cracked pistons are a sign of a faulty piston. But if you use a tune-only engine, the chances of cracked pistons are higher, as you’ll put more stress on the internal components of the engine.
A snappy crankshaft on a 2012 Duramax is no laughing matter. This devastating motor failure can cause weeks, if not months of downtime. While there is no one cause, the failure is usually caused by excessive rpms and the large external counterweight. To avoid a costly breakdown, consider purchasing an aftermarket crankshaft from a reputable shop. Listed below are some tips to make sure your engine is running as smoothly as possible.
While a broken crankshaft on a diesel engine is rare (like one in a million), it is a significant problem. Even a simple problem can result in weeks or months of downtime and a big chunk of change missing from your wallet. Plus, this problem can lead to serious problems for staff as well. To avoid this, take your time to learn how to diagnose a broken crankshaft on a 2012 Duramax.
To troubleshoot a snapped crankshaft on a 2012 Duramax, you must first understand the cause of the problem. The ice pick trick can help fix low rail pressure. However, this trick does not work for the problem with high fuel rail pressure. To make sure you have the proper diagnosis, take your vehicle to a mechanic. This job can take up to ten hours to complete.
The LB7 Duramax engine was released in 2001 for the Chevrolet Kodiak and GMC Sierra HD trucks. These engines are still in production today. These trucks were very popular when they first came out, but have their fair share of problems. The 6.6L Duramax engine is one of the most popular in the aftermarket. Its lack of emissions controls parts has made it a popular choice among many truck owners.
If you notice any of the above symptoms on your vehicle, you may need to replace the water pump or fuel filter. It is very common for a Duramax engine to develop problems with its water pump. In some cases, the pump itself can cause problems, so it is important to replace it as soon as possible. Ultimately, it is best to take the truck to a mechanic as soon as possible.
One of the most common fuel-related issues in the 2012 Duramax is excessive fuel dilution. This is a result of the regeneration process and the way raw fuel is introduced into the exhaust stream. Active regeneration involves injecting fuel into the combustion chamber during the exhaust stroke. However, the fuel does not immediately combust and exits the engine into the exhaust stream. This results in high temperatures and fuel adhesion on the cylinder walls. The truck will also run hard, and the fuel filter needs to be replaced.
Injectors are another common cause of fuel-related problems with the 2012 Duramax. The fuel injectors in this truck are notoriously difficult to replace, and GM itself admitted that the design of the pump is not optimal. The injectors have faulty ball seats and can crack and leak over time. Bad injectors cause the vehicle to run rough and emit excessive smoke. While a simple replacement should be fairly straightforward, it is best to hire a professional to do the job.
Other fuel-related problems with the 2012 Duramax include a faulty CP4.2 injector. This is an expensive and time-consuming problem, but there are simple fixes to avoid it altogether. To prevent this problem, replace the CP4.2 injector with a new one. Make sure to keep your truck’s manual handy to avoid fuel-related problems. You can also follow these simple steps to prevent fuel-related issues in the future.
One of the most common fuel-related problems with the 2012 Duramax comes from the LBZ engine. These were the first Duramax engines to be built with six-speed Allison transmissions. This engine had emissions control parts that were not present in older Duramaxes. However, LBZ and LLY engines had problems with overheating, particularly when towing or driving in hot weather. One problem with the LBZ engine is that it was not equipped with a lift pump factory-installed. These problems can be fixed with aftermarket parts.
Another fuel-related issue with the 2012 Duramax is leaking from the exhaust system. This fluid is added to the exhaust system to convert nitrous oxides into more beneficial byproducts. Using SCR improves fuel economy by 10 percent, but these improvements will not be long-term. The diesel exhaust fluid is relatively inexpensive, so the increase in fuel economy will soon be offset by the cost. So, it is best to get your vehicle checked by a professional to avoid fuel-related problems in the future.