Removing and installing fuel pressure regulating valve N276, version 2 — VW

Removing and installing
fuel pressure regulating valve
N276
, version 2
Special tools and workshop equipment required
Open end spanner insert, AF 30 mm
T10553
Torque wrench
V.A.G 1332
Removing
Remove engine cover panel
Chapter
.
Release and unplug electrical connector
2
.
Remove fuel rail
Chapter
.
Do not loosen
fuel pressure regulating valve
N276
1
on fuel rail while it is installed.
Note
The fuel rail may be clamped into a vice to allow for removing the pressure regulating valve. Always use protective jaw covers when clamping the fuel rail into a vice. Position the fuel rail in such a way that no force is exerted on the threaded connections for the high-pressure lines or the retaining tabs for securing the fuel rail to the cylinder head.
Clamp fuel rail in vice with jaw protectors.
Loosen
fuel pressure regulating valve
N276
1
fuel rail.
Before removal, clean area around thread for
fuel pressure regulating valve
N276
using e.g. commercial cleaning solution.
Under no circumstances may dirt enter the hole of the high-pressure accumulator.
Clean carefully; cleaning solvent must not enter the electrical connector.
Unbolt
fuel pressure regulating valve
N276
2
from fuel rail
1
.
Dry
fuel pressure regulating valve
N276
.
Extract dirt from hole of high pressure accumulator (threads and sealing surface). Do not use tools or other instruments for this purpose.
Seal off open connection in high-pressure reservoir with clean plug.
Installing
Note
Fuel pressure regulating valve
N276
must be renewed each time after removing.
The beginning of the thread and the deformable sealing lip of the
fuel pressure regulating valve
N276
must be moistened with diesel fuel.
Tighten
fuel pressure regulating valve
N276
by hand.
Install fuel rail
Chapter
.
Align
fuel pressure regulating valve
N276
1
using suitable workshop equipment.
Turn valve in such a way that the connector can be connected to connection
2
free of tension.
The installation position of connection
2
may differ.
Fill/bleed fuel system
Chapter
.
Install engine cover panel
Chapter
.
Following renewal, reset learnt values
Vehicle diagnostic tester
.
Self-diagnosis-capable systems
0001 - Engine electronics
0001 - Engine electronics, functions
0001 - Reset adaptation values of engine ctrl. module
Specified torques
Chapter
“
Assembly overview - high-pressure accumulator (fuel rail)
”