Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
11 24 571 Replacing all connecting rod bearing shells (N52K)
Modified procedure: The colors of the connecting rod bearing shells are the same at the top and bottom.
The Blue/Red connecting rod bearing shell colors are no longer fitted in combination.
Necessary preliminary tasks:
- Remove OIL SUMP
Possible classifications per connecting rod at top and bottom:
r: Red
b: Blue
Only one color may be fitted per big end bearing cap and connecting rod.
In direction of arrow from (1 to 2) crank pin (1 to 6).
Example:
Possible classification: rbbrrb
Cylinder 1: Classification Red/Red
Cylinder 2: Classification Blue/Blue
Cylinder 3: Classification Blue/Blue
Cylinder 4: Classification Red/Red
Cylinder 5: Classification Red/Red
Cylinder 6: Classification Blue/Blue
Release connecting rod bolts (1).
Remove connecting rod bearing cap (2).
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.