Pre-tensioning the timing chain with the special tool
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.
- Ensure that the timing chain is correctly
pre-tensioned with the special tool 2 455 654
.
The pin (1) must close flush with the housing (2) .
- Ensure that the timing chain does not have too low
of a pre-tension.
The pre-tension is too low if the pin (1) of the special tool 2 455 654 does not close flush with the housing (2) .
The timing chain is not pre-tensioned correctly .
- Ensure that the timing chain does not have too high
a pre-tension.
The pre-tension is too high if the pin (1) of the special tool 2 455 654 does not close flush with the housing (2) .
The timing chain is not positioned correctly .