Removing and Installing Exhaust Manifold - I

Removing And Installing Exhaust Manifold

Preliminary work

Preliminary work for removing exhaust manifold
1. Remove engine.

Removing exhaust manifold - Cayenne S (type M48/00)







1. Loosen starter catalyst from exhaust manifold. To do this, loosen the three fastening screws -arrows-.







2. Unclip the oxygen sensor cable from all holders. Remove oxygen sensor when replacing exhaust manifold.
3. Loosen the 12 fastening nuts in the sequence shown below. Remove the exhaust manifold.







Installing exhaust manifold - Cayenne S (type M48/00)

NOTE:
- Visually inspect exhaust manifold for cracks and distortion.
- A cracked or distorted exhaust manifold may not be reinstalled.
- As a matter of principle, replace seals on manifold.
- If the studs in the cylinder head are damaged, they must be replaced.

1. Clean sealing surfaces. The surfaces must be free from foreign objects.
2. Use a new seal. The seal must be positioned so that the part number is visible from the outside.
3. Push the manifold across the studs and fit it with 12 new fastening nuts. The fastening nuts are tightened in two stages in accordance with the tightening sequence. Tightening torque: 19 ftlb. and Tightening torque: 24 ftlb..







4. Fit oxygen sensor when replacing exhaust manifold. Clip oxygen sensor cable into the holders.
5. Fit starting catalytic converters with new gaskets.







Subsequent work

Subsequent work for installing exhaust manifold
1. Install engine.