Why are duramax injectors so expensive
If you want to learn more about the costs associated with Duramax Injector Replacement, read on! The cost of this project is so high due to the arrangement of this kind of engine and the number of parts that must be replaced to repair the problem. There are some variables in cost related to the kind of engine that needs the fix. You might find that the repairs will take more or less time depending on which kind of Duramax Engine you have.
The amount of labor that is involved in the job will affect the overall cost of the replacement process for you as the customer. Some makes and models of vehicles will not require as much in the way of disassembly to gain access to the fuel injection system, which can save time and labor costs overall.
The year of your vehicle can also have a significant impact on the cost of this repair service and models that have a heavy-duty engine are going to cost significantly more than those with a regular engine. The hours of labor involved can also vary depending on whether you take your truck to a dealership or to a mechanic shop for the service. The biggest factor in the failure of Duramax Fuel Injectors is bad fuel.
You can avoid this replacement service in most instances by making sure that you are not running poor-quality diesel fuel through your engine. The best way to make sure that this is not going to impact your engine is to shop for fuel at locations that belong to major companies like Chevron. Small stations might not sell much diesel and the diesel in the tanks could have been sitting for a long time.
Smaller stations might also buy contaminated fuel. You should always aim to buy fuel at locations that sell large volumes of fuel. Another warning sign when fueling up is a pump that is running very slowly.
It might be worth just paying for the small amount of fuel you have purchased and moving on to greener pastures.
Another common failure is body leakage, which adds diesel fuel to the engine oil, causing the level to rise. LB7 injectors using Bosch common rail technology operate at very high pressure.
Poor quality fuel will cause premature injector failure. The process changes from model year to model year and is complex enough that we recommend purchasing a service manual if you are attempting this job yourself. The LB7 Duramax built from — 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.
The LB7 Duramax built from — The good news is the replacement injectors you purchase from us incorporate several updates to help prevent repeat failures. The LLY Duramax injectors usually fail high fuel return rates, which cause hard starting and rough running, especially noticeable at idle. After the injectors are placed in the injector cups, Jason secures the hold-downs with the recommended 37 ft-lb of torque.
With the new injectors in place, the reassembly process then begins, and it is basically the disassembly in reverse. First, the fuel rail is installed, along with new bolts if needed. With the new injectors, electrical connections, and lower valve cover reinstalled, it's now time to clean the upper valve cover and install it. Jason uses gray RTV silicone to ensure a leak-free seal between the head and the cover.
After thousands of miles of hard use, the factory injector lines can often be contaminated with rust, as is the case here. In order to steer clear of wiping out a brand-new set of injectors, Jason always recommends replacing the injector lines with new Bosch pieces.
It's almost a shame the bright Bosch lines will be hidden once the external valve cover accessories are remounted. Once the injector lines are in place, the fuel filter housing and FICM are reinstalled. The final step before starting the engine involves connecting the engine's air-intake tubing and filter box to the Duramax's turbocharger.
Even with everything connected, the fuel system needs to be primed for the engine to start. This can be done by pressing on the primer on the filter housing, which, after about 20 to 30 pushes, will become hard, signaling it's time for the engine to be fired. With the Duramax started back up, the balance rates of the new injectors are checked and fall well within spec, and the LB7 is ready to hit the road for thousands more miles!
Injector cups Duramax injectors are not installed directly in the cylinder head.