skoda Workshop Repair Guides

Skoda Workshop Service and Repair Manuals

ABOUT US
Removing and installing the high pressure pump > < Fuel system, engine side

Octavia Mk2

High pressure pump - Summary of components
High pressure pump - Summary of components
  Caution
In order to avoid the high pressure pump to run dry and to achieve a quick engine start after parts are replaced, the following points must absolutely be observed:
t  If the fuel system was opened, starting with the fuel tank through to the high pressure pump, the ventilation of the fuel system must be carried out before starting the engine. For this purpose, switch on the ignition and only switch it off once the fuel pump has come to a standstill. Repeat this procedure at least »5 times«.
t  If the high pressure pump is removed or replaced, the initial fuel filling of the high pressure pump must be carried out before the first engine start. For this purpose, connect the vehicle diagnosis, measurement and information system -VAS 505x- and carry out the targeted function „bleeding the fuel system“. During this function, the fuel pump is actuated for 180 seconds.
t  If the high pressure system was opened, it must be checked for tightness → Chapter.
   
1 - Bracket for auxiliary units
2 - 20 Nm + torque a further 180° (1/2 turn)
q   replace
3 - Hub
q   with transmitter ring
q   to release and tighten use counterholder -T10051-
q   to remove use extractor -T40064-
4 - Toothed belt gear
q   for high pressure pump
5 - 20 Nm
6 - 95 Nm
7 - 20 Nm + torque a further 45° (1/8 turn)
q   replace
8 - High pressure pump
q   removing and installing → Chapter
q   with fuel dosage valve -N290-
q   Pressure test → Chapter
q   an initial fuel filling must be carried out after the replacement (absolutely avoid it to run dry) → Anchor
9 - Fuel intake hose
10 - Fuel return-flow hose
11 - High pressure line, 15 Nm + torque a further 60° (1/6 turn)
q   between the high pressure pump and the fuel distributor
q   do not install under tension
q   Tighten union nuts in one work step without time delay between tightening and torquing angle (max. 1 min)
q   first of all tighten the union nut on the side of the high pressure pump
q   only tighten the fixing screw of the clamp after tightening both union nuts
  Note
t  The high pressure line can be re-used after the following tests:
t  Check the sealing cones and the union nuts for damage, deformations and tears.
t  The inner line boring must not be deformed, constricted or damaged.
t  A corroded high pressure line must not be reinstalled.

   

Removing and installing the high pressure pump > < Fuel system, engine side