FASTENER TIGHTENING SPECIFICATIONS
| Component | Fastener Size | Nm |
|---|---|---|
| After Run Coolant Pump Bracket to Bracket Bolt | 8 | |
| After Run Coolant Pump Bracket to Upper Oil Pan Bolt | 40 | |
| Coolant Expansion Tank Bolt | 5 | |
| Coolant Fan to Fan Shroud Nut | 10 | |
| Cover for Thermostat to Coolant Pump Bolt | 9 | |
| Engine Coolant Temperature Sensor Retaining Plate to Coolant Pump Bolt | 4 | |
| Fan Shroud to Radiator Bolt | 5 | |
| Front Coolant Pipe Bolt | 3.5 | |
| Radiator to Charge Air Cooler Bolt (3) | 5 | |
| Small Coolant Pipe Bolt | 9 | |
| Toothed Belt Cover to Coolant Pump Bolt | 9 | |
| Toothed Belt Drive Gear to Balance Shaft Bolt 1, 2 | 10 + 90° | |
| (1) Always replace (2) Has left hand threads (3) GTI, Eos, Passat and CC only | ||
| (1) | Always replace |
| (2) | Has left hand threads |
| (3) | GTI, Eos, Passat and CC only |
Coolant Pump Bolt Tightening Sequence and Specification
Tighten the bolts in sequence -1 through 5- to 9 Nm.
Special tools and workshop equipment required
- Cooling System Tester V.A.G 1274 B
- Adapter V.A.G 1274/8
- Adapter V.A.G 1274/9
Conditions
- The engine is at operating temperature
Sequence
| WARNING | The coolant system is under pressure when the engine is warm. Risk of scalding due to hot steam and hot coolant. Reduce pressure by covering the coolant expansion tank cap with a cloth and open carefully. |
Open the coolant expansion tank cap.
Install the adapter V.A.G 1274/8 onto the coolant expansion tank.
Clamp the connecting piece V.A.G 1274 B/1 in the adapter V.A.G 1274/8.
Connect the connector piece V.A.G 1274 B/1 to the cooling system tester V.A.G 1274 B using the connecting hose.
Scheme 44
Generate a positive pressure of approximately 1.0 bar using the tester hand pump.
| CAUTION | Risk of scalding! Reduce the pressure before disconnecting the cooling system tester V.A.G 1274 B from the connecting hose or connector piece V.A.G 1274 B/1. To do this, press the pressure release valve on the cooling system tester V.A.G 1274 B until the pressure gauge displays "0". |
If the pressure drops
Look for leaks and correct.
Checking the Pressure Relief Valve in the Cap
Install the cap to the adapter V.A.G 1274/9.
Clamp the connecting piece V.A.G 1274 B/1 in the adapter V.A.G 1274/9.
Connect the connector piece V.A.G 1274 B/1 to the cooling system tester V.A.G 1274 B using the connecting hose.
Scheme 45
Actuate the hand pump.
- The pressure release valve must open at 1.4 to 1.6 bar.