Disassembly of nozzles

When disassembling, pay attention to the shims, which set the same injection pressure for stable engine operation. This adjustment somewhat complicates the repair, because, despite the ease of installation of the nozzle body and needle, the pressure setting requires special control in the workshop or in the Bosch service. Only in case of emergency, in order to drive several kilometers, can the injection pressure adjustment be neglected after replacing the needle and the atomizer body.

Sequence of work

1. To disassemble the nozzle, clamp it by the upper hex in a vise, being careful not to damage the drain pipe fittings. Unscrew the parts of the nozzle from each other with a key.



2. Using a brass brush, carefully remove carbon deposits from body 2 (pic. 4.81) and needle 3 sprayer.

3. Check the tightness of the needle seat: if you place the atomizer body in clean fuel, then the needle under the action of its weight should fit snugly into place.

4. After proper assembly of the nozzle, screw it into the cylinder head with a force of 70–80 Nm.