Caution: Be extremely careful when handling injectors. Never put your hand or any other part of your body under the nozzles of the nozzles. because due to the high working pressure, fuel can get under the skin with all possible unpleasant consequences. You must strictly adhere to the rule that works. that involve testing the injectors under pressure should be carried out by dealers or diesel engine specialists. Before. how to get started, read the preliminary notes in paragraph 1 this chapter.
General information
1. The injectors are designed for a long service life and it makes sense to check them with a rebuild or replacement circuit after 100,000 km. Accurate inspection, repair and calibration of injectors must be carried out by specialists. Faulty injectors that cause detonation and increased smoke production can be identified without dismantling as follows.
2. Start the engine at idle. Loosen the fuel supply line connector for each injector one by one by placing a rag around it to collect the spilled fuel and avoid getting the jet on the skin. When the faulty injector is disconnected, detonation and smoke generation will stop.
Removing
Attention: Take measures to prevent contamination of injectors and fuel lines. The nozzles are manufactured with high precision and you should handle them with care.
3. Disconnect the negative battery terminal.
4. For better access, please refer to paragraph 16 and remove the intake manifold.
5. Thoroughly clean the nozzle and fuel line nuts (see fig. 10.5). Loosen the clamps and disconnect the air outlet hose from the nozzle.
Pic. 10.5. Nozzle device
A nozzle body
The washer
C High pressure fuel line
D Air outlet hose
E Cap
6. Lay absorbent material around the nozzle. Wipe off the fuel line fittings, then remove the nut securing the appropriate high pressure fuel line to the top of the injector.
7. Loosen the appropriate union nut for each high pressure fuel line on top of the fuel pump. When the nuts on all fittings are loosened, use an open end wrench to hold the adapter on the pump to prevent it from being twisted out of the pump. When the union nuts are loosened, remove the fuel lines from the engine. Close injectors and fuel line fittings to prevent dirt from entering the system (see Homemade fixture).
Cut off a separate finger from an old rubber glove and secure it with an elastic band on top of the open fuel line fitting to keep dirt out.
8. Using a deep thorium wrench, unscrew the nozzle from the cylinder head.
Caution: Unscrew the injector by the lower hex part adjacent to the cylinder head. It must not be unscrewed by the upper hex section, otherwise the nozzle will be broken.
9. Remove the washer, remembering how it should be installed.
Installation
10. Install a new washer on the cylinder head. then screw the nozzle into place and tighten to the required torque.
11. Connect the fuel lines and tighten the union nuts. Put the clamps on the tubes from which they were removed.
12. Connect the air outlet hose to the nozzle and tighten the hose clamps (where provided).
13. Install the intake manifold in accordance with paragraph 16.
14. Connect the negative terminal of the battery and check the operation of the engine.