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 12 729 Checking cylinder head for water leaks (N16)
Special tools required:
Necessary preliminary tasks:
- Remove CYLINDER HEAD .
- Disassemble cylinder head. See REMOVING INTAKE CAMSHAFT , REMOVING EXHAUST CAMSHAFT , and REMOVING ALL ROCKER ARMS .
Extend special tool 11 9 521 with special tool 11 9 523 .
Installation note:
Assembly special tool 11 9 521 so that all water channels are sealed.
Fix special tool 11 9 523 by tightening to 25 Nm.
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.