Volkswagen CJDA Workshop Manual page 383

7 - Copper washer
q Renew
8 - O-ring
q Renew
9 - Clamping plates
One clamping plate encompasses 2 injectors each.
q Reusable.
10 - Bolt, turn 8 Nm +270° (3/4 turn) further
q Renew
Note
If replacement engine is fitted, it is essential to check torque.
11 - Fuel return lines
q Cannot be renewed separately
q To fuel tank
q The fuel return line must not be kinked, damaged or blocked.
q The fuel return lines must not be dismantled.
12 - Pressure retention valve
Caution
◆ Pressure retention valve must not be disconnected or pulled off whilst engine is running as
this destroys the injectors.
◆ Fuel return lines must not be disconnected or pulled off whilst engine is running as this de-
stroys the injectors.
◆ Residual pressure must not be lower or higher than 10, as this destroys the injectors.
q Renewed together with fuel return lines.
q The pressure retention valve has the task of always maintaining a residual pressure (control volume)
of approx. 10 bar in the fuel return lines. The injectors require this control volume to function.
q The pressure retention valve may only be renewed completely together with the fuel return lines.
q Fill/bleed fuel system after exchanging
q Check pressure retention valve
13 - Fuel pressure sender -G247-, 100 Nm
q Removing and installing
⇒ P age 394
q Checking
14 - Bolt, 22 Nm
15 - Fuel line, 30 Nm
q Secured with 3 clamps
q Between high-pressure pump and high-pressure accumulator (fuel rail)
q Removing and installing
Caution
The high-pressure lines may be re-used after the following checks:
◆ Check taper seat of respective high-pressure line for deformation and cracks.
◆ The inside of the line must not be deformed, constricted or damaged.
◆ Corroded lines should no longer be used.
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
⇒ P age
383.
⇒ P age
385.
⇒ P age 379
⇒ P age 375
Industriemotoren - Industrial Engines 2009 ▶
1 Repairing diesel direct injection system
3
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