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Removing and installing combination valve for secondary air system (left-side) - engine code CBRA > < Removing and installing combination valve for secondary air system - engine code BDB, BMJ, BUB

A3 Mk2

Checking combination valves for secondary air system for proper operation and leakage - engine code CBRA
Checking combination valves for secondary air system for proper operation and leakage - engine code CBRA
Special tools and workshop equipment required
   
t  Hose clamps, up to Ø 25 mm -3094- for combination valve for secondary air system (left-side)
  W00-0079
t  Hand-operated vacuum pump -VAS 6213-
Procedure
l  Vacuum hoses and hose connections do not leak.
l  Vacuum hoses are not clogged.
  W00-10259
Combination valve for secondary air system (left-side):
–  Disconnect air pipe -arrows-.
  Note
Disregard -item 1-.
  A24-10314
–  Disconnect vacuum hoses -1, 2, 4- at rear of intake manifold.
–  Unbolt hose bracket from intake manifold -arrows- and move clear to rear, with hoses attached.
  Note
Disregard -item 3-.
  A10-10958
–  Disconnect secondary air hose -arrow-, move hose clear towards the top and clamp off using hose clamp -3094-.
  A26-10616
–  Disconnect vacuum hose from combination valve for secondary air system (left-side).
–  Connect hand-operated vacuum pump -VAS 6213- to vacuum connection on combination valve for secondary air system.
  A26-10613
–  Disconnect secondary air hose at the position marked with an -arrow-.
–  Blow lightly into secondary air hose with your mouth (do not use compressed air).
l  The combination valve for secondary air system should be closed; it should not be possible to blow through the hose.
–  Operate hand-operated vacuum pump to produce a vacuum.
l  The combination valve for secondary air system should open; it should now be possible to blow through the hose.
–  Renew combination valve for secondary air system (left-side) if valve does not react as described → Chapter.
  A10-1791
Combination valve for secondary air system (right-side):
–  Remove combination valve for secondary air (right-side) → Chapter.
–  Connect hand-operated vacuum pump -VAS 6213- to vacuum connection -1- on combination valve (right-side) for secondary air system.
–  Connect a suitable test hose -2- onto combination valve for secondary air system.
–  Blow lightly into test hose with your mouth (do not use compressed air).
l  The combination valve for secondary air system should be closed; it should not be possible to blow through the hose.
–  Operate hand-operated vacuum pump to produce a vacuum.
l  The combination valve for secondary air system should open; it should now be possible to blow through the hose.
–  Renew combination valve for secondary air system (right-side) if valve does not react as described → Chapter.
Assembling
Installation is carried out in the reverse order; note the following:
–  Install combination valve for secondary air (right-side) → Chapter.
  A26-10420

Removing and installing combination valve for secondary air system (left-side) - engine code CBRA > < Removing and installing combination valve for secondary air system - engine code BDB, BMJ, BUB