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Cooling system, checking for proper seal Audi A8 D3 рестайлинг

6.0l 12-cyl. 4v Engine Mechanical, Engine Code(s): Bsb 3 illustrations ~144 words

Cooling system, checking for proper seal

Special tools, testers and auxiliary items required

Scheme 629

Scheme 629: Cooling system, checking for proper seal
Scheme 629: Cooling system, checking for proper seal
  1. Cooling system tester V.A.G 1274
  2. Adapter V.A.G 1274/8
  3. Adapter V.A.G 1274/9

Conditions

  1. Engine at operating temperature.

Work sequence

  1. Remove cover above coolant reservoir - arrows -.
CAUTIONCover the cap of the expansion tank with a rag and open it carefully, as hot steam, i.e. hot coolant, may escape when opening.
  1. Open cap of coolant expansion tank.

Scheme 630

Scheme 630
Scheme 630
  1. Place cooling system tester V.A.G 1274 with adapter V.A.G 1274/8 onto expansion tank.
  2. Generate a positive pressure of approx. 1.0 bar using hand pump of cooling system tester.

If the pressure drops

  1. Search for leaking areas and repair malfunction.

Scheme 631

Scheme 631: Checking pressure relief valve in cap
Scheme 631: Checking pressure relief valve in cap
  1. Place cooling system tester V.A.G 1274 with adapter V.A.G 1274/8 onto cap.
  2. Generate a positive pressure using hand pump of cooling system tester.
  1. Pressure release valve must open at a positive pressure of 1.4 to 1.6 bar.

If pressure relief valve does not open as indicated

  1. Replace cap.