Checking the coolant system for tightness |
Special tools and workshop equipment required |
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| Coolant system tester (e.g.-V.A.G 1274 -) |
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| Adapter (e.g. -V.A.G 1274/8-) |
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| 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. |
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| Position tester -V.A.G 1274 - with adapter -V.A.G 1274/8- on the compensation bottle. |
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| With the hand pump of the tester generate an overpressure of approx. 0.1 MPa. |
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| If the pressure drops determine positions of the leak and eliminate fault. |
Testing the pressure relief valve in the cap |
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| Screw cap onto tester with adapter - V.A.G 1274/9-. |
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| With the hand pump of the tester generate an overpressure of approx. 0,15 MPa. |
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| The pressure relief valve should open at a pressure of 0.12...0.15 MPa. |
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