Installing the idler pulley
WARNING: This page is about a different car, the 2025 BMW M4, 2024 BMW M4, 2023 BMW M4, 2022 BMW M4, and 2021 BMW M4. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
Hot surfaces
.
Risk of burning!
Risk of burning!
- Perform all work only on components that have cooled down.
Preliminary work
- Refer to REMOVING THE FRONT-END STRUT .
- Refer to REMOVING THE LEFT INTAKE FILTER HOUSING (FRONT-END STRUT REMOVED) .
- Refer to REMOVING THE RIGHT INTAKE FILTER HOUSING (FRONT-END STRUT REMOVED) .
- Refer to REMOVING THE CLEAN AIR PIPE FOR CYLINDERS 1 TO 3 .
- Refer to REMOVING SEAL FOR FRONT HOOD .
- Refer to REMOVING THE COVER FOR THE CENTER ENGINE COMPARTMENT .
- Refer to REMOVING UPPER CROSS CONNECTION .
- Refer to REMOVING THE REAR TOP CROSS CONNECTION .
- Refer to REMOVING THE FRONT SPOILER .
- Refer to REMOVING THE FRONT UNDERBODY PROTECTION .
- Refer to REMOVING THE LEFT AND RIGHT FRONT UNDERSHIELD .
- Refer to REMOVING THRUST FIELD .
- Refer to REMOVING THE RIGHT HAND FRONT BOTTOM SIDE COVER .
- Refer to DRAINING THE COOLANT FOR THE HIGH-TEMPERATURE COOLANT CIRCUIT .
- Refer to CONNECTING THE COOLANT LINE TO THE RADIATOR .
- Refer to REMOVING THE FAN COWL .
- Refer to REMOVING THE CHARGE AIR DUCT FOR CYLINDERS 1-3 .
- Refer to REMOVING THE CHARGE AIR DUCT FOR CYLINDERS 4-6 .
- Refer to REMOVING THE CHARGE AIR CROSSING .
- Refer to REMOVING THE DRIVE BELT FOR ALTERNATOR .
- Thread in the idler pulley (2) and install it.
- Tighten down screw (1) .
TIGHTENING TORQUE SPECIFICATIONS
| Idler pulley on holder | ||
|---|---|---|
| M10 | tightening torque | 60 Nm |
- Insert and install the protective cap (1)
.
The protective cap (1) must engage audibly.