Installing Cylinder Head (Cylinders 1-3)

WARNING: This page is about a different car, the 2024 Porsche 911, 2023 Porsche 911, and 2022 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.

Fit new cylinder-head gasket and check that dowel sleeves are installed correctly.
Install cylinder head.
Carefully fit cylinder head on the cylinder block.

Screw in new cylinder head screws -1 to 8- by hand.

Tighten cylinder-head screws in the sequence -1 to 8- .

> Initial tightening 5 Nm (3.5 ftlb.)

> Tightening torque 50 Nm (37 ftlb.)

> Loosen all screws 0 Nm (0 ftlb.)

> Initial tightening 4 Nm (3 ftlb.)

> Subsequent tightening 12 Nm (9 ftlb.)

-1 to 4- : > Torque angle 65 Grad

-5 to 8- : > Torque angle 60 Grad

-1 to 4- : > Final tightening torque angle 65 Grad

-5 to 8- : > Final tightening torque angle 60 Grad

Fig 1: Cylinder Head Screws Tightening Sequence
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Tightening sequence for cylinder head
Screw in and tighten screws on chain housing.
> Tightening torque 13 Nm (9.5 ftlb.)

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Chain housing screws
Secure coolant collection unit -1- .
Screw in and tighten screws -2- .

> Tightening torque 13 Nm (9.5 ftlb.)

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Coolant collection unit
Secure lines on the cylinder head.
Clip in clip -3- .

Connect and lock electric plug connection -2- .

Screw in and tighten screw on line bracket -1- .

> Tightening torque 10 Nm (7.5 ftlb.)

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Lines on cylinder head
Screw in and tighten screw for coolant regulator -1- .
> Tightening torque 13 Nm (9.5 ftlb.)

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Coolant regulator at cylinder head
Fit bearing pin -2- .
Replace O-rings.

Screw in and tighten bearing pins -2- .

> Tightening torque 10 Nm (7.5 ftlb.)

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Position of bearing pins
Fit and tighten screw -1- on the generator -2- .
> Tightening torque 15 Nm (11 ftlb.)

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Screw on generator
Install hydraulic tappets -1 and 2- .
Visually inspect hydraulic tappets -1 and 2- for wear and replace them if necessary.

Coat hydraulic tappets -1 and 2- with engine oil.

Insert bucket tappets -1- and switching tappets -2- in accordance with allocation into the fitting bores in the cylinder head.

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Hydraulic tappets for valve control