Checking cooling system for leaks (Sharan, Tiguan): VW 1.4 (CAVA, CAVB, CAVC, CAVD, …)
Step-by-step checking cooling system for leaks (Sharan, Tiguan) for the VW 1.4: 13 steps. What to remove, in what order, and what to check after.
Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: VW Sharan II / SEAT Alhambra (7N, 2010–), VW Tiguan I (5N, 2007–2016)
- Renewed: cap
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- Hot steam may escape when expansion tank is opened. Place cloth over cap and open with caution. — Open filler cap on coolant expansion tank.
📋 Procedure
- ⚠ Hot steam may escape when expansion tank is opened. Place cloth over cap and open with caution. — Open filler cap on coolant expansion tank.
- Screw adapter for cooling system testerV.A.G 1274/8 into coolant 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.
- Using hand pump on tester, build up a pressure of approx. 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.
- Build up pressure to approx. 1.6 bar using hand pump on cooling system tester.
- Renew cap.
- Increase pressure to over 1.6 bar.
- Renew cap.
Other VW procedures
- Installing camshaft housing – VW Golf V / Jetta
- Removing and installing accelerator moduleGX2
- Removing and installing front exhaust pipe
- Removing and installing catalytic converter (Polo)
- Removing and installing lower part of intake manifold – VW
- Removing engine · 41 torque figures
- Removing and installing camshaft – VW Golf Cabriolet · 47 torque figures
- Adjusting valve timing – VW Passat B5 · 83 torque figures
- Removing and installing camshafts – VW Passat B6 · 39 torque figures
- Removing and installing coolant pump · 53 torque figures
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.