Checking cooling system for leaks using cooling system testerV.A.G 1274 B — VW
Checking cooling system for leaks using cooling system testerV.A.G 1274 B on VW: 11 steps, engines BPR, BPS.
Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: platform codes 1C1, 1Y7
- Renewed: cap
📋 Procedure
- ⚠ Steam may escape when expansion tank is opened. Wear eye protection and protective clothing to avoid eye injuries and scalding. Cover cap with cloth and open carefully. — Open cap for 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, it is essential that any prevailing pressure is allowed to escape. 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 fault.
- 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.
- Operate hand pump.
- Renew cap.
Other VW procedures
- Aligning exhaust system free of stress · 13 torque figures
- Removing and installing lower part of sump – VW Touareg I · 5 torque figures
- Removing and installing throttle valve module J338 · 6 torque figures
- Removing and installing fuel filter – VW Touran II · 3 torque figures
- Removing and installing valve timing housing – VW Jetta VI · 2 torque figures
- 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.