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What revising an njector means and when it is necessary I want to explain in this piece with text and photos.

When injector overhaul:

Injector overhaul is necessary if diesel floats on the water, the engine smokes gray / blue and / or the engine has more diesel knock than before. I dare say that if your engine is older than 20 years you are always ready for an atomizer overhaul.

What happens during an overhaul and what are the costs:

During an overhaul, the nozzle (atomizer) is replaced and the injector housing is cleaned in an ultrasonic bath. The injector is adjusted to the correct opening pressure by means of sims. The costs can vary a lot, depending on the type of atomizer, but for this injector from the Volvo Penta MD11 the costs are about € 120 to € 130. Volvo Penta asks for € 225 for a refurbished injector.

Tools needed:

Spanners

Ultrasonic bath

Injector pressure tester

Sims to adjust the pressure.

Step 1.

The first step is to remove the atomizer from the head of the engine, I wrote this in an earlier piece on my site.

Step 2.

The nut under which the injector spring is located is removed. Below is a spring, a thrust pin, a guide piece for the spring and some sims to adjust the pressure.

Step 3.

The injector sleeve is removed and with that the old injector is also loose.

Step 4.

After disassembling the parts, the atomizer is first coarsely cleaned in a sink.

After cleaning the injector house, the injector hous enters the cleanroom, where the injector is deeply cleaned in various ultrasonic trays.

Step 6.

The injector is checked with an injector tester and adjusted to the correct pressure. Adjusting the correct pressure is done with sims that are in the cap of the injector holder, these sims have different thicknesses to be able to adjust the injector.

Step 7.

The injector housing is neatly sprayed in the desired color of paint.