Torx Screw Cylinder Head M12 x 1.5 x 140  ›  9A700863300

Torx Screw Cylinder Head - M12 x 1.5 x 140
Sold each - 4 required per car

The Cylinder Head Torx Screw is a replacement engine fastening component designed to secure the cylinder head assembly on compatible Porsche engines.

Fits:

• Porsche Boxster 987 MKII 2.9L 2009-12
• Porsche Boxster S 987 MKII 3.4L 2009-12
• Porsche Boxster 981 2.7L 2012-16
• Porsche Boxster 981 S / GTS 3.4L 2012-16
• Porsche Boxster 981 Spyder 3.8L 2016
• Porsche Boxster GTS 718 4.0L Manual (400 Bhp) 01/2019>>
• Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>>
• Porsche Boxster 25 Years 718 4.0L Manual (400 Bhp) 01/2020>>
• Porsche Boxster 25 Years 718 4.0L PDK (400 Bhp) 01/2020>>
• Porsche 997 MKII Carrera C2 3.6L 2009-12
• Porsche 997 MKII Carrera C4 3.6L 2009-12
• Porsche 997 MKII Carrera C2S 3.8L 2009-12
• Porsche 997 MKII Carrera C4S 3.8L 2009-12
• Porsche 997 MKII Turbo 2010-13
• Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
• Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
• Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
• Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
• Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
• Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
• Porsche 991.1 R 4.0L (500 Bhp) 2016
• Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
• Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
• Porsche 991.2 Carrera 2 3.0L (370 Bhp) 2016-19
• Porsche 991.2 Carrera 2S / GTS 3.0L (420/450 Bhp) 2016-19
• Porsche 991.2 Carrera 4 3.0L (370 Bhp) 2016-19
• Porsche 991.2 Carrera 4S / GTS 3.0L (420/450 Bhp) 2016-19
• Porsche 991.2 Cabriolet 2 3.0L (370 Bhp) 2016-19
• Porsche 991.2 Cabriolet 2S / GTS 3.0L (420/450 Bhp) 2016-19
• Porsche 991.2 Cabriolet 4 3.0L (370 Bhp) 2016-19
• Porsche 991.2 Cabriolet 4S / GTS 3.0L (420/450 Bhp) 2016-19
• Porsche 991.2 Targa 4 3.0L (370 Bhp) 2016-19
• Porsche 991.2 Targa 4S / GTS 3.0L (420/450 Bhp) 2016-19
• Porsche 991.2 Turbo Coupe 3.8L (540 Bhp) 2016-19
• Porsche 991.2 Turbo S Coupe 3.8L (580 Bhp) 2016-19
• Porsche 991.2 Turbo Cabriolet 3.8L (540 Bhp) 2016-19
• Porsche 991.2 Turbo S Cabriolet 3.8L (580 Bhp) 2016-19
• Porsche 991.2 Speedster 4.0L (510Bhp) 2019
• Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
• Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19
• Porsche 991 GT3 Cup 2018-2019
• Porsche 992.1 Carrera 2 3.0L 2019-24
• Porsche 992.1 Carrera 4 3.0L 2019-24
• Porsche 992.1 Carrera 2 Cabriolet 3.0L 2019-24
• Porsche 992.1 Carrera 4 Cabriolet 3.0L 2019-24
• Porsche 992.1 Carrera 2S / GTS 3.0L 2019-24
• Porsche 992.1 Carrera 4S / GTS 3.0L 2019-24
• Porsche 992.1 Carrera 2S / GTS Cabriolet 3.0L 2019-24
• Porsche 992.1 Carrera 4S / GTS Cabriolet 3.0L 2019-24
• Porsche 992.1 Targa 4 3.0L 2020-24
• Porsche 992.1 Targa 4S / GTS 3.0L 2020-24
• Porsche 992.1 Speedster 4.0L 2019-24
• Porsche 992.1 Turbo 3.8L 2020-24
• Porsche 992.1 Turbo S 3.8L 2020-24
• Porsche 992.1 Turbo Cabriolet 3.8L 2020-24
• Porsche 992.1 Turbo S Cabriolet 3.8L 2020-24
• Porsche 992.1 GT3 4.0L / 992 S/T 4.0L 2021-24
• Porsche 992.1 GT3 RS 4.0L 2022-24
• Porsche 992.1 (911) Sport Classic 3.8L 2023
• Porsche 992.1 (911) Dakar 3.0L 2023-24
• Porsche 992.2 Carrera 2 3.0L 2024>>
• Porsche 992.2 Carrera 2S 3.0L 2024>>
• Porsche 992.2 Carrera T 3.0L 2024>>
• Porsche 992.2 Carrera 4S 3.0L 2024>>
• Porsche 992.2 Carrera 2 GTS / Spirit 70 3.6L 2024>>
• Porsche 992.2 Carrera 4 GTS 3.6L 2024>>
• Porsche 992.2 Turbo S 3.6L 2024>>
• Porsche 992.2 GT3 / Touring / S/C 2025>>
• Porsche Cayman 2.9L 987C MKII 2009-12
• Porsche Cayman S / R 3.4L 987C MKII 2009-12
• Porsche Cayman 2.7L 981 2013-16
• Porsche Cayman S / GTS 3.4L 981 2013-16
• Porsche Cayman GT4 3.8L 2015-16
• Porsche Cayman GTS 718 4.0L Manual (400 Bhp)
• Porsche Cayman GTS 718 4.0L PDK (400 Bhp)
• Porsche Cayman GT4 Clubsport
• Porsche Cayman GT4 RS Clubsport 2020-2024

What Does It Do?

The cylinder head screw secures the cylinder head to the engine, maintaining the correct clamping pressure needed for reliable combustion chamber sealing.

Why Does It Fail?

Common causes include:

• Excessive tightening or overstretching
• Repeated engine overheating
• Corrosion or thread damage
• Incorrect installation procedures
• Reuse of bolts designed for single use

When Should It Be Replaced?

Replace whenever specified by the Porsche workshop procedure, particularly during cylinder head removal or engine rebuilding.

Damaged, stretched or corroded screws must not be reused.

Checks & Installation

Inspect the cylinder head, threaded mounting holes and gasket surfaces before installation.

Follow the correct Porsche tightening sequence, torque settings and angle-tightening procedure where specified.

Confirm whether the original screws are single-use fasteners before reassembly.

Key Features

• Replacement cylinder head Torx screw
• M12 x 1.5 thread 140 mm length
• Helps maintain correct cylinder head clamping
• Suitable for engine servicing and rebuilding
• Sold individually – 4 required per car

Porsche Cylinder Head Bolts & Engine Fastening Components

Cylinder head screws are essential engine fasteners that maintain the secure connection between the cylinder head and engine assembly.

Correct installation and tightening are critical for maintaining combustion sealing and preventing damage to engine components.