It is rarely ever pleasant to notice an injector noise on your BMW 5 Series. It is a noise that arises repeatedly, usually when you accelerate or your engine is idling. However, this symptom may be related to multiple types of problems with your car injectors. It may not be anything serious, but when a persistent noise shows up, you have to be sure. Especially since fixing your BMW 5 Series’s injectors can be expensive. That’s why our team chose to prepare this content page in order to support you see more clearly, learn about the different possible failures and identify your trouble. To do this, we will first look at the normal running and usefulness of the injectors in your BMW 5 Series, then at the possible causes from which an injector noise may come.
Functions of the injectors
Injectors are a very significant element of the operation of your engine motor. They were brought in to the modern cars about 20 years ago. Before their appearance, more conventional carburettor-type intake systems were employed, which handled the intake of air and fuel into the engine cylinders. With the injectors, manufacturers now have the possibility, thanks to the injectors pump, to control electronically each stage of the intake process very accurately (quantity of fuel injected, air/fuel mixture) via the analysis of the data accumulated from the various sensors equipping the car (engine temperature, acceleration level, engine speed, etc.). Their goal is therefore to inject under high pressure a precise quantity of an air/fuel mixture at a perfect timing to get the best possible combustion in the cylinders.
The different origins of a clicking or knocking noise based on the injectors of your BMW 5 Series
Hearing injector noises on your BMW 5 Series may come from different locations, we will now look into the potential triggers of these. In general, the typical noise of a faulty injector is of the snap type. Here are the several sources of these noises and the solutions to be applied to stop them. If you notice another clicking noise but it is not from your injectors, we suggest you to go through this content page about clicking noise on BMW 5 Series to discover the reason.
The causes for injector clicking or knocking noise BMW 5 Series
A clicking or knocking noise from your injectors can be justified by different causes. In fact, the injectors of your BMW 5 Series have three main missions, to manage the vaporisation of the fuel, i.e., to transform the liquid into “gas” during injection, to facilitate its combustion. Then, its objective is to control the air/fuel dosage and at last the homogeneity of the mixture, always with the target of improving combustion. If one of these three tasks is modified, the main purpose of the injectors will be disrupted and this will lead to poor combustion. This bad combustion will be a violent explosion in the cylinders as a consequence of bad timing, or a bad quantity of mixture or finally an inhomogeneous mixture and will induce thoses knocking or clicking noises on your BMW 5 Series. The main reason of these situations commonly originates from a particle that gets into the injectors. The accuracy of the injector being in the nanometer range, any possible blockage will inevitably result in a malfunction of the injector. If after verifying, this noise originates from another component of the engine of your BMW 5 Series, browse this content page for more informations.
The effects of injector noise on BMW 5 Series
Now that we have reviewed the different reasons for injector noise on your BMW 5 Series, we will end by stating the possible effects of malfunctioning one or more of your injectors. Whether only one is obstructed, or damaged, or your entire fuel rail is involved, you cannot escape these side effects which can fairly quickly become serious….
First, you risk destroying your exhaust unit in the long run, because the unburned fuel residues that will end up in your exhaust system can corrode the metal in it.
One of the most known repercussions noticed by drivers is a serious loss of power. In fact, if your engine is running on 3 out of 4 cylinders for example, you will undoubtedly have a loss of power
Finally, you risk deteriorating one of your pistons or your engine. Poor combustion will fairly quickly damage your cylinders or pistons and your engine may tighten.
Here are three little recommendations to limit the risks connected with your injectors and protect you from engine failure:
- Do not drive at the bottom of the tank, as you may absorb impurities
- Use quality fuel
- Think of swapping your diesel fuel filter regularly>
