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Testing pressure relief valve in filler cap
– Fit cooling system tester - V.A.G 1274 B- with adapter -
V.A.G 1274/9- onto filler cap.
– Build up pressure with hand pump on cooling system tester.
• The pressure relief valve must open at a pressure of 1.6 to
1.8 bar.
– Renew filler cap if pressure relief valve does not open as de‐
scribed.
1.4 Flushing cooling system
Note
♦
The coolant must be drained before the system is flushed.
Then the cooling system must be filled with distilled water.
♦
The cooling system is flushed with 20 l of distilled water. Then,
the distilled water is replaced by coolant (mixture ratio 50:50).
♦
Never reuse old coolant.
♦
For a quick reference guide, refer to
⇒ “1.5 Flushing cooling system, quick reference guide”,
page 266 . The quick reference guide contains the basic steps
of the workflow. It might be helpful to print out the guide and
tick off the corresponding work steps after having performed
them.
Ateca 2017 ➤ , León 2013 ➤ , León ST 2013 ➤
4 cyl. petrol engine (1.8 l and 2.0 l with direct injection, 4 V, exhaust gas turbocharger, timing chain,
EA 888 III. Gen) - Edition 10.2018
1. Cooling system/coolant 247
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