Checking vacuum reservoir and vacuum hoses — AUDI
Checking vacuum reservoir and vacuum hoses on Audi: 13 steps, engines CAYD, CAYE, CFHC, CFHE. What to remove, in what order, and what to check after.
Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: platform code 2C0
- Special tools named: VAS 6213
- Renewed: vacuum hose, cylinder head cover
Don't miss
- Do not use screws or threaded bolts.
📐 39 workshop diagrams for CAYD
Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.
📋 Procedure
- Pull off vacuum hose (arrow) from connection.
- Connect hand vacuum pumpVAS 6213 to removed vacuum hose (arrow) and generate a partial vacuum of 0.6 bar.
- Observe pressure gauge of hand vacuum pumpVAS 6213 for approx. 30 seconds.
- Pull off vacuum hose (2) from cylinder head cover (1).
- Seal open end of hose with suitable plug from engine bung setVAS 6122. [Note: Do not use screws or threaded bolts.]
- Connect hand vacuum pumpVAS 6213 to pulled-off vacuum reservoir and generate a partial vacuum of 0.6 bar.
- Observe pressure gauge of hand vacuum pumpVAS 6213 for approx. 30 seconds.
- Renew vacuum hose.
- Connect hand vacuum pumpVAS 6213 with vacuum hose from VAS 6213 to cylinder head cover and generate a partial vacuum of 0.6 bar.
- Observe pressure gauge of hand vacuum pumpVAS 6213 for approx. 30 seconds.
- Renew cylinder head cover .
- First pull vacuum hose off at hand vacuum pumpVAS 6213.
- Reconnect vacuum hose to T-piece and cylinder head cover.
Ask TorqFix about your Audi CAYD — it answers with the exact sequence for that engine and the workshop drawing for each step. First question is free after a 20-second sign-up, no card.
Ask about your Audi CAYD — free → or sign up free to see the drawingsOther AUDI procedures
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Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
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The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.