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Renewing injection timing device cover O-ring > < Removing and installing injectors

Leon Mk2

Diesel direct injection and glow plug system
Servicing Diesel direct injection system
Servicing injectors

This engine is equipped with dual spring injectors. The fuel injected therefore occurs in 2 stages.
If faults occur with these injectors then they are to be exchanged as neither servicing nor pressure setting is possible.

Special tools, testers, measuring instruments and auxiliary items required

  • ◆ Injector test unit V.A.G 1322 with pressure pipe V.A.G 1322/2

Test conditions

  • ● Pressure gauge on
 
V02-0184

Checking injection pressure

Warning!
When testing injectors ensure that the jet of fuel does not contact the hands as the high pressure will cause the fuel to penetrate the skin and may cause severe injuries.

  • ‒ → Connect injector to injector test unit.
  • ‒ Move pump lever down slowly. When spray begins, read off opening pressure. For deviations from specification renew injector.
        Specification:
        New injectors: 190 ... 200 bar
        Wear limit: 170 bar

Checking for leaks

  • ‒ Move pump lever down slowly and maintain a pressure of approx. 150 bar for 10 seconds. No fuel should leak from the nozzle tip.
  • ‒ If injector leaks, replace.

Renewing injection timing device cover O-ring > < Removing and installing injectors