Flywheel bolt. Porsche 964 / 968 / 993 / 996T, GT3 / 997 GT3  ❭  99911901701

Flywheel Bolt, 10 X 62 mm.
The OE Match Flywheel Bolt, 10 x 62 mm is a high-strength replacement fastening component designed to securely attach the flywheel to the engine crankshaft. Manufactured to OE specifications for dimensional accuracy, strength and durability, this bolt is engineered to withstand the extreme rotational forces, torque loads and thermal stresses generated within the drivetrain.  

Fits:

• Porsche 964 (911) C2 1989-93
• Porsche 964 (911) C4 1989-93
• Porsche 964 (911) TURBO 3.3L 1991-93
• Porsche 964 (911) TURBO 3.6L 1991-93
• Porsche 993 (911) C2 1994-97
• Porsche 993 (911) C4 1994-97
• Porsche 993 (911) C2S 1994-97
• Porsche 993 (911) C4S 1994-97
• Porsche 993 (911) TURBO 1994-96
• Porsche 993 (911) GT2 1994-97
• Porsche 993 (911) TURBO S 1994-97
• Porsche 996 TURBO 2000-05
• Porsche 996 GT3 MKI 1999-02
• Porsche 996 GT3 MKII 2003>>
• Porsche 996 GT3 RS 2003-04
• Porsche 997 MK1 GT3 / GT3 RS 2007-09
• Porsche 968 3.0L 1992-94
• Porsche 968 Sport 3.0L 1994-95
• Porsche 968 CS 3.0L 1993-95
• Porsche 968 Turbo S 3.0L 1993-94  

Diagram Ref No 28

Produced from premium-grade materials and manufactured to precise tolerances, the flywheel bolt provides the critical clamping force required to maintain the secure connection between the crankshaft and flywheel assembly. Correct installation and torque specification are essential for reliable engine operation, clutch performance and drivetrain safety.  

What This Product Does:

• Secures the flywheel to the engine crankshaft.
• Maintains critical clamping force within the drivetrain assembly.
• Ensures correct flywheel alignment and positioning.
• Withstands high torque loads and rotational forces.
• Supports smooth power transfer from the engine to the transmission.
• Helps maintain clutch and drivetrain reliability.
• Contributes to safe and dependable vehicle operation.

Symptoms Of Wear Or Failure:

• Drivetrain vibration during operation.
• Unusual noises from the flywheel or bellhousing area.
• Flywheel movement or instability.
• Clutch engagement irregularities.
• Difficulty maintaining correct torque specification.
• Visible thread damage, corrosion or bolt stretching.
• Premature wear of clutch and flywheel components.
• Engine-to-transmission alignment issues.
• Potential catastrophic drivetrain failure in severe cases.

Why Replacement Matters:

• Flywheel bolts are subjected to extreme mechanical loads, vibration, rotational stress and thermal cycling throughout their service life. Many flywheel bolts are designed as single-use or torque-to-yield fasteners, meaning they can stretch during installation and should be replaced whenever the flywheel is removed.
• Reusing worn or stretched flywheel bolts can compromise clamping force, increasing the risk of flywheel loosening, vibration and damage to critical drivetrain components. In severe cases, bolt failure can result in significant engine and transmission damage, leading to costly repairs.
• Replacing flywheel bolts during clutch, flywheel or engine service ensures the assembly remains securely fastened and operates as intended. An OE Match replacement provides factory-style fitment, precise manufacturing and dependable strength, helping maintain drivetrain integrity, smooth operation and long-term reliability for your Porsche.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99911901701

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