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.
41 00... Installing A Cavity Bulkhead (Not Expanded)
The following repair represents replacement of a cavity bulkhead.
Before these work steps, prepare the new part so that it is ready to install (adapting, cutting to size, applying welding primer etc.).
Sand contact surface of cavity bulkhead (1) with coarse-grained abrasive paper (grain 50 - 100).
Clean contact surface (1) with spirit.
Apply an approx. 15 mm high bead of original BMW window adhesive to contact surface (1).
Attach cavity bulkhead in specified position (see old part).
Fit, secure and weld up new part.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.