Removing and installing mechanical exhaust gas recirculation valve - engine code letters AFB, AKE, AKN, AYM, BAU, BCZ, BFC — AUDI

🧭 Before you start

Fits: Audi A6 C5 (4B)

• Renewed: gaskets

Don't miss

• Mark position of retaining clips on injector pipes (e.g. with felt-tip pen).
• Mark injector pipes according to cylinder (e.g. with felt-tip pen).
• Renew gaskets and self-locking nuts.
• Make sure that retaining clips are positioned correctly.

🔧 Engine codes this applies to

📐 60 workshop diagrams for AFB

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

📋 Procedure

1. Remove exhaust elbow on vehicles with engine code letters AFB and AKN: vehicles with front-wheel drive , vehicles with four-wheel drive .
2. Remove starter catalytic converter on vehicles with engine code letters AKE, AYM, BAU, BCZ, BDH, BFC: vehicles with front-wheel drive , vehicles with four-wheel drive .
3. Remove intake manifold (front section) 23.
4. Mark position of retaining clips on injector pipes (e.g. with felt-tip pen).
5. Mark injector pipes according to cylinder (e.g. with felt-tip pen).

6. Disconnect injector pipes with ring spanner3035.
7. Disconnect vacuum hose from mechanical exhaust gas recirculation valve (arrow).
8. Remove nuts (1) and bolt (2).
9. Detach mechanical EGR valve. [Note: Renew gaskets and self-locking nuts.]
10. Fit injector pipes one at a time, working from bottom to top and secure using torque wrenchV.A.G 1331 and 17 mm attachment (commercially available).
11. Make sure that retaining clips are positioned correctly.
12. Install exhaust elbow on vehicles with engine code letters AFB and AKN: vehicles with front-wheel drive , vehicles with four-wheel drive .
13. Install starter catalytic converter on vehicles with engine code letters AKE, AYM, BAU, BCZ, BFC: vehicles with front-wheel drive , vehicles with four-wheel drive .

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