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Removing and installing auxiliary oil cooler on lock carrier > < Removing and installing sump (top section)

A4 Mk1

Renewing oil retention valves
Renewing oil retention valves
  Note
In the event of irregular valve noise which disappears after a lengthy drive but repeatedly re-occurs when travelling short distances, the oil retention valves must be renewed.
   
Removing
–  Remove noise insulation -arrows-.
–  Remove front bumper → Rep. Gr.63.
–  Move lock carrier to service position → Rep. Gr.50.
–  Drain off coolant → Chapter.
–  Remove toothed belt → Chapter.
–  Remove coolant pump → Chapter.
–  Remove secondary air pump → Chapter.
–  Remove intake manifold → Chapter.
–  Remove coolant pipe (front) → Chapter.
–  Unscrew cover beneath intake manifold.
  A10-0018
Exploded view of components:
1 - O-ring; renew
2 - O-ring; renew
3 - Oil retention valve for cylinder head (left-side), 20 Nm
4 - Banjo bolt, 15 Nm
5 - Spray nozzle valve for piston cooling nozzles, 25 Nm
6 - Oil pipe
7 - O-ring; renew
8 - Oil retention valve for cylinder head (right-side), 20 Nm
9 - O-ring; renew
Installing
Installation is carried out in the reverse order; note the following:
  Note
Renew gaskets and seals.
–  Install coolant pipe (front) → Chapter.
–  Install intake manifold → Chapter.
–  Install secondary air pump → Chapter.
–  Install coolant pump → Chapter.
–  Install toothed belt (adjust valve timing) → Anchor.
–  Install vibration damper → Chapter.
–  Install poly V-belt → Chapter.
–  Install viscous fan → Chapter.
–  Install lock carrier with attachments → Rep. Gr.50.
–  Install front bumper → Rep. Gr.63.
–  Fill cooling system → Anchor.
Tightening torque
  A17-0121
ComponentNm
Cover to cylinder block10

   

Removing and installing auxiliary oil cooler on lock carrier > < Removing and installing sump (top section)