| Checking the coolant system for tightness |
| Special tools and workshop equipment required |
| t
| Coolant system tester (e.g.-V.A.G 1274-) |
| t
| Adapter (e.g. V.A.G 1274/8) |
| t
| Adapter (e.g. -V.A.G 1274/9-) |
WARNING | Hot steam may escape when the expansion reservoir is opened; cover the cap with a cloth and open carefully. |
|
| –
| Position tester -V.A.G 1274 - with adapter -V.A.G 1274/8- on the compensation bottle. |
| –
| With the hand pump of the tester generate an overpressure of approx. 0.1 MPa. |
| –
| If the pressure drops determine positions of the leak and eliminate fault. |
| Testing the pressure relief valve in the cap |
| –
| Screw cap onto tester with adapter -V.A.G 1274/9-. |
| –
| With the hand pump of the tester generate an overpressure of approx. 0,15 MPa. |
| –
| For an overpressure of 0.12 ... 0.15 MPa the pressure relief valve must open. |
|
|
|
