Checking cooling system for leaks (Polo, Touran, Golf Plus, Eos, Scirocco, Golf, Golf Cabriolet) — VW
Checking cooling system for leaks (Polo, Touran, Golf Plus, Eos, Scirocco, Golf, Golf Cabriolet) on VW: 13 steps, engines CAVA, CAVB, CAVC, CAVD.
Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: VW Polo 6R (2009–2014), VW Touran I (1T, 2003–2015), VW Golf VI (5K, 2008–2013), VW Golf Cabriolet (517, 2011–2016); platform codes 5M1, 1F7, 137, 521
- Renewed: sealing cap
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- Hot steam may escape when expansion tank is opened. Place cloth over cap and open with caution. — Open cap on coolant expansion tank.
📐 60 workshop diagrams for CAVA
Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.
📋 Procedure
- ⚠ Hot steam may escape when expansion tank is opened. Place cloth over cap and open with caution. — Open cap on coolant expansion tank.
- Screw adapter for cooling system testerV.A.G 1274/8 onto expansion tank.
- Clamp connectorV.A.G 1274 B/1 into adapter for cooling system testerV.A.G 1274/8.
- Join connection pieceV.A.G 1274 B/1 to cooling system testerV.A.G 1274 B using connecting hose supplied.
- Use hand pump on tester to create a pressure of about 1.0 bar.
- ⚠ Risk of scalding! Before disconnecting cooling system testerV.A.G 1274 B from connecting hose or connectorV.A.G 1274 B/1, always relieve existing pressure. To do this, press pressure relief valve on cooling system testerV.A.G 1274 B until pressure gauge displays value of »0«. — Find leaks and rectify.
- Screw cap into adapter for cooling system testerV.A.G 1274/9.
- Clamp connectorV.A.G 1274 B/1 into adapter for cooling system testerV.A.G 1274/9.
- Join connection pieceV.A.G 1274 B/1 to cooling system testerV.A.G 1274 B using connecting hose supplied.
- Use hand pump on cooling system tester to create a pressure of max. 1.4 bar.
- Renew sealing cap.
- Increase pressure to over 1.4 bar.
- Renew sealing cap.
Ask TorqFix about your VW CAVA — 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 VW CAVA — free → or sign up free to see the drawingsOther VW 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.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.