Checking combi-valves for secondary air: VW (CBRA)

🧭 Before you start

Fits: platform code 1F7

• Renewed: left combi-valve

Don't miss

• Check vacuum lines to make sure they are connected properly.
• Blow lightly into hose leading to combi-valves (do not use compressed air).
• Blow lightly into hose leading to combi-valves again (do not use compressed air).

🔧 Engine codes this applies to

📋 Procedure

1. Check vacuum system for leaks including vacuum reservoir on intake manifold.
2. Check vacuum lines to make sure they are connected properly.
3. Check vacuum hoses for porosity.
4. Detach secondary air hose at position indicated by (arrow).
5. Blow lightly into hose leading to combi-valves (do not use compressed air).

6. To do this, seal the hose leading to right combi-valve (arrow) with a hose clamp.
7. Blow lightly into hose leading to combi-valves again (do not use compressed air).
8. Pull vacuum hose off left combi-valve.
9. Connect hand vacuum pumpVAS 6213 to left combi-valve.
10. Operate hand vacuum pumpVAS 6213 repeatedly.
11. Renew left combi-valve .
12. Repeat check of right combi-valve.

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