11 53 Thermostat And Connections
WARNING: This page is about a different car, the 2010 BMW 135i, 2009 BMW 135i, and 2008 BMW 135i. However, it is still accessible from the selected car via links, so may be relevant.
THERMOSTAT AND CONNECTIONS SPECIFICATIONS
| Type | Thread | Description | Tightening Specification | |
|---|---|---|---|---|
| 1AZ Thermostat housing to coolant pump. | N54 | M6 x 25 | 8 Nm | |
| 2AZ Thermostat housing to coolant pump. | N54 | M8 x 16 | 20 Nm | |
| 3AZ ASA screw (4 x) Assembly, feed line to crankcase top section |
N54 | M6 x 20 | 9 Nm | |
| 4AZ Feed line to coolant pump. | N54 | L42-48 | Hose clamp | 3 Nm |
| 5AZ Feed line to thermostat | N54 | Hose clamp | 3 Nm | |
| 6AZ Coolant hose to cylinder head | N54 | M6 x 23 | 9 Nm | |
| 7AZ ISA screw (1 x) Coolant feed line to exhaust turbocharger |
N54 | M6 x 12 | 8 Nm | |
| 8AZ ISA screw (1 x) Coolant return line to exhaust turbocharger |
N54 | M6 x 12 | 8 Nm | |
| 9AZ ISA screw (1 x) Coolant return line to crankcase top section |
N54 | M6 x 16 | 8 Nm | |
| 10AZ ISA screw (2 x) Coolant feed lines to assembly, feed line |
N54 | M6 x 16 | 8 Nm | |
| 11AZ EJOT screw (1 x) Housing, coolant thermostat, to holder. |
N54 | M5 x 21.8 | 9 Nm | |
| 12AZ Hose clamp (2 x) Coolant hose between coolant thermostat and radiator. |
N54 | L42-48 | 3 Nm |