Cooling System: Testing and Inspection

Cooling System, Checking for Leaks

Special tools, testers and auxiliary items required

• Cooling System Tester (V.A.G 1274 B)

• Adapter (V.A.G 1274/8)

• Adapter (V.A.G 1274/9)

Checking

• Engine at operating temperature.

Risk 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 opening.

- Remove the cap - arrow - from the coolant reservoir.






- Position the (V.A.G 1274 B) with the (V.A.G 1274/8) on coolant reservoir.






- Generate approximately 1 bar (14.50 psi) pressure using the cooling system tester hand pump.

- If pressure falls, search for leaks and correct problem.

Pressure Relief Valve in Cap, Checking






- Attach the (V.A.G 1274 B) with the (V.A.G 1274/9) to sealing cap.

- Generate pressure with cooling system tester hand pump.

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

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