Non-return valve
Non-return valve |
1. |
Pinch off the coolant hoses, from the engine and to the cabin, at the non-return valve. Use two pinch-off pliers 30 07 739.
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2. |
Undo the hose clips.
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3. |
Remove the non-return valve.
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To fit |
1. |
Fit the non-return valve.
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2. |
Tighten the hose clips.
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3. |
Remove the pinch-off pliers.
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4. |
Fill up with coolant. Close the filler cap.
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5. |
Start the heater first and then the engine. Run them simultaneously until all air has been expelled from the system.
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6. |
Check the coolant level and coolant freezing point. Top up as necessary.
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