11 53 Thermostat And Engine-Mounted Coolant Lines
N55 ENGINE (2016-2018):
11 53 THERMOSTAT AND CONNECTIONS - TIGHTENING TORQUE SPECIFICATION
| Type | Thread | Tightening specification | Measure | |
|---|---|---|---|---|
| 1AZ Thermostat housing to coolant pump. | N55 | M6 x 25 | 8 Nm | |
| 2AZ Thermostat housing to holder. | N55 | 9 Nm | ||
| 3AZ Holder to radiator | N55 | Self-tapping screw | 3 Nm | |
| 4AZ Feed line to crankcase. | N55 | M6x16 | 8.5 Nm | |
| 5AZ Feed line to coolant pump. | N55 | L42-48 | Hose clamp | 3 Nm |
| 6AZ Oil-to-water heat exchanger (OWWT) feed line. | N55 | L18-24 | Hose clamp | 3 Nm |
| 7AZ Coolant line to cylinder head (short-circuit line). | N55 | M6 x 23 | 8.5 Nm | |
| 8AZ Coolant line to thermostat. | N55 | Hose clamp with corrugated spring | 3 Nm | |
| 9AZ Coolant hose from thermostat to coolant pump | N55 | L42-48 | 3 Nm | |
| 10AZ Radiator supply and drain line to exhaust turbocharger | N55 | M6 x 16 | 8 Nm | |
| 11AZ Coolant return line to crankcase. | N55 | M6 x 16 | 8 Nm |
S55 ENGINE (2019-2022):
11 53 THERMOSTAT AND CONNECTIONS - TIGHTENING TORQUE SPECIFICATION
| Type | Thread | Tightening specifications | Dimension | |
|---|---|---|---|---|
| 1AZ Thermostat housing to coolant pump. | S55 | M6x25 | 10 Nm | |
| 2AZ Feed line to crankcase. | S55 | M6x16 | 8 Nm | |
| 3AZ Coolant line to cylinder head (short-circuit line). | S55 | M6x23 | 8.5 Nm | |
| 4AZ Coolant supply and drain line to exhaust turbocharger | S55 | M6x12 | 8 Nm | |
| 5AZ Coolant supply and drain line to crankcase. | S55 | M6x12 | 8 Nm | |
| 6AZ Coolant pump to crankcase. | S55 | M6x52 M6x25 |
8 Nm | |
| 7AZ Belt pulley to coolant pump | S55 | M6x12 | 8 Nm | |
| 8AZ Holder electric coolant pump to crankcase. | S55 | M8x22 | 19 Nm |