Diesel Injector Fuel Injector 0445120080 Bosch for Dx225 Excavator Diesel Engine

Experienced car owners are able to check the condition and performance of the injectors without removing them from the internal combustion engine, namely, aurally. To do this, use the usual rectangular plank Or better yet, a stethoscope.

Attach one end tightly to the injector to be checked, and the other end to the ear. If the nozzle is in normal working condition, then you will not hear any extraneous sounds or vibrations from it, only uniform clicks. But if it does not click or the sounds are not uniform, and there are other vibrations and knocks, this means that the nozzle under study is clogged. And the stronger the knocks and noises, the greater the degree of blockage.

In general, you can listen to the nozzles without the mentioned board. However, this requires relevant experience. The fact is that with a faulty node, a muffled high-frequency sound, similar to a squeak or whistle, will be heard from the cylinder block. If you heard it while the internal combustion engine is running, we recommend that you check the operation of the nozzle in more detail on a stand or ramp.

Checking injectors on the bench

Stand for testing injectors

Mechanical characteristics affect the performance of injectors. And their verification is possible only at a special stand. You can read how to make it with your own hands in a separate material. Namely, at the stand they check:

• the amount of fuel passing through the nozzle;
• fuel pressure;
• the shape of the “torch” of the nozzle.

Checking the removed injector on the stand is the most accurate diagnostic method. With it, you can determine the degree of damage to the nozzle and the feasibility of repair.