Have you ever wondered what causes bosch injection pumps to stuck? The Bosch injection pump became stuck due to dirt in the fuel line.Another factor is the empty tank, which can cause friction with the injection plunger.
I remember when my Bosch injection pump stuck. I had a sleepless night over it until I discovered that it was dirty that stuck my injection plunger. As soon as I service the injection pump, my pump starts pumping.
Below, I will share with you how to do that and other factors that can make your injection pump stick.
Why Injection Pump Stuck
The main function of the injection pump is to supply diesel according to the load of the diesel engine, and the high-pressure diesel is delivered to the injector regularly and quantitatively.
The type most commonly used on diesel engines is the plunger fuel injection pump. But sometimes you find out that this component may fail to deliver it because the plunger stuck together or some other related fault exists.
Below, I will tell you three reasons that can stick you with the injection pump.
- Dirty: In fact, this is the most common reason why your injection pump plunger stuck. The dirty water usually comes from the diesel line. This usually happens when the fuel filter is clogged. So you need to avoid allowing your fuel filter to become clogged.
- Empty diesel tank: the injection pump plunger requires lubrication. In the absence of lubrication, this component stuck due to friction. Diesel serves as the lubricant that lubricates the plunger; if the injection pump is starved of diesel, you should expect the plunger to stick.
- Engine overheating: abnormal engine temperature can affect the fuel temperature,which can also stick the injection pump plunger. When the fuel temperature is too high, it can lead to the plungers sticking together.
How to Maintain the Injection Pump
There are need for you to maintain your injection pump so that it can work for you for so long. Let me tell you how you can maintain your injection pump below.
- Use high-quality diesel and filters to ensure that the diesel entering the fuel injection pump is clean.
- Always check whether the fuel quantity and fuel quality in the oil pool of the fuel filling pump meet the requirements.
- Regularly check and adjust each cylinder’s fuel supply advance angle and fuel supply interval angle.
- Regularly check and adjust the fuel injection pump of each cylinder of the engine.
- Regularly check the camshaft clearance.
- Regularly check the sealing condition of the valve coupling.
- Regularly check the wear of the relevant keyways and fix bolts.
- Replace the worn plunger and outlet valve coupling in time.
- Properly maintain the fuel injection pump accessories.
How Do You Remove A Bosch Injector Pump
Removing the Bosch injector pump required some technicality. However, below, I will explain how you can do that.
Step 1: Disconnect all the pressure pipes that connect the injection pump to the injector nozzles.
Step 2. Remove all the fuel filter hoses or pipes that are attached to the injection pump.
Step 3. If there is sufficient space for you, you may not need to remove the radiator, but if there is not enough space, you need to remove the radiator.
Step 4. Loosen the timing cover or the small cover that covers only the injection timing gear.
Step 5. Loosen the bolts that hold the injection pump to the engine housing.
Step 6: Loosen the big nuts that hold the injection pump to the timing gear.
Step 7. Remove the injection pump timing gear
Step 8. Apply a little force and remove the injection pump.
How Do You Adjust A Bosch Injection Pump
There are a few ways to adjust a Bosch injection pump. It all depends on what you want to adjust for.
You can adjust for more acceleration, idle, knocking, and smoke. In this article, I will write about them.
Adjustment for more acceleration: To do this, you can adjust the screw at the governor side. By tightening it, it pushes the acceleration handle, which gives the pump more firing power.
Adjustment for smoking: Sometimes your injection pump is the cause of the irregular smoke at the exhaust tailpipe. You need to loosen the two nuts, tighten the injection pump element, and adjust it accordingly before locking the stud.
Adjustment for idle: There is another screw at the governor side that needs to be adjusted for idle purposes. The screw needs to be loosened or tightened depending on what you want.
What Is Calibration Of Fuel Injection Pump
It is very important for the injection pump to be calibrated.
The fuel injection pump is designed so that all the cylinders will receive and deliver an equal amount of fuel, especially in an engine with more than one cylinder.
Calibration means ensuring all the cylinder injectors receive equal fuel pressure form the injection pump.If there is variation in the fuel delivery of one cylinder compared to another, that will affect the performance of the engine. When the calibration is not done, you will observe that there will be irregular performances from the cylinders.
Some cylinders may work, while others may not.
So to ensure fuel delivery equality among the cylinders, fuel injection pump calibration is needed.
Calibration can be done during the engine rebuild or during a repair. When you notice an injection malfunction, go for injection pump calibration.
What Are The Part Of Bosch Type Injection Pump
Let us list the injection pump components
- Drive Shaft: with the help of the gear, it drives the injection pump.
- Delivery valve:Has a hole that allow diesel to pass with pressure.
- Plunger of element: it responsible for sending diesel to the injectors
- Governor: Control the speed or the rpm and allow the engine to do idle
- Injection pump housing: Where all the components attached to. Just like the engine block
- Valve holder: it housing the delivery valve, it usually has a spring .
- Piston: it ensure hydraulic sealing at both pressures high and low
- Gasket and seal: the gasket and seal perform similar functions but different positions. They ensure there is no fuel leakage or oil leakage.
- Injection solenoid: This is an electric component that control the fuel in and out. it also responsible for engine shot down.
How Does A Bosch Pump Work
The function of injection pump is to raised the pressure of the fuel to a certain value of injection and deliver it precisely with the help of injectors to the combustion chamber.
Some high pressure pipe transport the fuel to the injectors.
The fuel is dragged by a transfer pump to the fuel filter then the injection pump.
The injection pump element pump the fuel out, and the delivery valve ensure it only allows the fuel to pass with some certain pressure .
There is also provision for lubrication. The lubricant is received from the engine to ensure that the drive shaft and piston are well lubricated.
There is oil seals at both ends that prevent oil leakages. The gasket also support the seals to prevent fuel leakages.
An electric control solenoid is available to regulate the speed, either pneumatic or mechanically control.
Can Bosch Injectors Be Repaired
Absolutely yes. Bosch injectors can be repaired. These are the steps you must take to repair it.
- Troubleshooting: Be certain that the injectors are faulty.
- Test: carry out the test with the injector calibrating machine.
- Replace the injector tip: Replacement of the injector tip is still part of the repair because you are not replacing the whole unit but rather only the tips.
- Re-calibration: During repair, there is a need for you to calibrate to be sure that fuel pressure is equal in all the cylinders.
- Adjust the injectors spring: to maintain the usual pressure bar, you may need to expand or compress the injectors spring.
- Cleaning: A deposit of carbon may have blocked the needle eyes of the injectors tips.
With these few steps, you can get your injectors repaired.
To repair, you may need to replace the injectors tips.
HOW LONG DO BOSCH FUEL INJECTORS LAST
From what you have been reading so far, you can see the importance of fuel injectors on your internal combustion engine.
However, although injectors are meant to work forever, they are also subjected to wear.
As discussed above, sometimes all you need to do is repair, not replace. But at a point, you need to replace, not repair.
The lifespan of an injector is between 50,000 and 100,000 miles. In kilometers, the lifespan is between 80,000 and 160,000.
If your injector pump has reached this mileage, you should think about replacement, not repair.
But prior to this time, a faulty injector can be repaired either by you or a specialist.
If your injector has served you that well, repairing it may no longer be economical because you will be experiencing frequent injector breakdowns.
Are Bosch Good Fuel Injectors
Bosch injectors remain some of the best injectors available. It is a company known for efficiency and durability. It is made in Germany. And history doesn’t lie; German products are among the leading products on the market.
Another strong reason is Bosch’s good reputation and goodwill.
The precision and high technology make Bosch Injector the leading product among its competitors.
How Can I Tell If My Bosch Injectors Are Real
The market is full of imitation Bosch injectors. So many buyers have been deceived into buying a replica, thinking they have bought genuine Bosch injectors.
Below, how to identify genuine Bosch injectors will be outlined.
- Pay attention to the Bosch secure code label; do well to check the 16-digit number.
- Test the originality of the secure code: one simple way is by exposing it to light; the secure code is supposed to glimmer in rainbow color.
- You can visit this site, www.protect.bosch.com, to identify authenticity. Enter the Bosch Secure Code for proper verification.
With those three steps, the authenticity of Bosch injectors can be confirmed.
Final Thought
From the above article, you have learned why the Bosch injection pump stuck. You have to learn how long your Bosch injectors can last.
Don’t forget to pay attention to how to identify original Bosch injectors from the imitations.
The article also emphasizes how good and efficient Bosch injectors can be.
So if you are using Bosch injectors, congratulations; if you are not, go for Bosch injectors now.