Preliminary work for removing cylinder head

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NOTE: Interchanged or dirty bucket tappets.

Scoring on cylinder head

→ Since the bucket tappets have been run in the fitting bores in the housing, therefore do not interchange them.

→ Absolute cleanliness is essential.

1. Remove exhaust manifold. Remove old seal. REMOVING AND INSTALLING (INCLUDING EXHAUST MANIFOLD) CATALYTIC CONVERTER

2. Remove the cylinder head cover REMOVING AND INSTALLING CYLINDER HEAD COVER - ENGINE REMOVED .

3. Remove camshafts REMOVING AND INSTALLING CAMSHAFTS .

Information

There must be no visible sign of wear on the flat-based tappets and fitting bores of the flat-base tapper housing

4. Remove bucket tappets. Pull each of the components out of the flat-base tappet housing using a strong magnet.

Check running surfaces for signs of damage.
To avoid confusing the individual flat-based tappets, lay them on a labelled, clean surface → Example of laying aside flat-base tappets and cover them.

Fig 1: Example of laying aside flat-base tappets

Courtesy of PORSCHE OF NORTH AMERICA, INC.

5. Remove flat-base tappet housing.

Unscrew 11 Torx screws -1- from the outside in.
Remove housing and check the fitting bores for damage.

Fig 2: Flat-base tappet housing bolts

Courtesy of PORSCHE OF NORTH AMERICA, INC.

6. Remove the old O-rings at the spark-plug recesses.