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Contents Section: 4.2l - Cooling System - Engine Code(s): Caua (coupe) All sections

COOLING SYSTEM, CHECKING FOR LEAKS Audi S5 I

4.2l - Cooling System - Engine Code(s): Caua (coupe) 2 illustrations ~113 words

COOLING SYSTEM, CHECKING FOR LEAKS

Special tools and workshop equipment required

  1. Cooling System Tester V.A.G 1274 B
  2. Adapter V.A.G 1274/8
  3. Adapter V.A.G 1274/9

Procedure

  1. Engine at operating temperature.
WARNINGRisk of scalding due to hot steam and hot coolant. The coolant system is under pressure when the engine is warm. Reduce pressure by covering coolant reservoir cap with a cloth and carefully open.

Open the coolant reservoir cap.

Position V.A.G 1274 B with V.A.G 1274/8 on coolant reservoir.

Scheme 16

Scheme 16
Scheme 16

Generate approximately 1 bar pressure using the cooling system tester hand pump.

If pressure falls, search for leaks and correct problem.

Scheme 17

Scheme 17: PRESSURE RELIEF VALVE IN CAP, CHECKING
Scheme 17: PRESSURE RELIEF VALVE IN CAP, CHECKING

Attach V.A.G 1274 B with V.A.G 1274/9 to sealing cap.

Generate pressure with cooling system tester hand pump.

  1. The pressure release valve must open at 1.4 to 1.6 bar.

If pressure relief valve does not open as specified, replace cap.