Gudgeon Circlip Fitting Tool. Porsche 986 / 987 / 996 / 997

Wrist Pin (Gudgeon Clip) Fitting Tool – Precision Alignment & Installation Kit for Engine Rebuilds

This wrist pin (gudgeon clip) fitting tool set is specifically designed for Porsche’s flat-six engines found in the 986 Boxster, 987 Boxster/Cayman, 996 Carrera, and 997.1 Carrera. Engineered to ensure precise piston wrist pin installation, this tool kit dramatically reduces the risk of clip deformation, scoring, or incorrect seating during engine assembly.

Fits:

• Porsche Boxster 986 2.5L 1997-99
• Porsche Boxster 986 2.7L 1999-02
• Porsche Boxster S 986 3.2L 1999-02
• Porsche Boxster 986 2.7L 2003-04
• Porsche Boxster S 986 3.2L 2003-04
• Porsche Boxster 987 2.7L 2005 -08/08
• Porsche Boxster 987 S 3.2/3.4L 2005-08/08
• Porsche Boxster 987 MKII 2.9L 2009-2012
• Porsche Boxster S 987 MKII 3.4L 2009-2012
• Porsche 996 C2 3.4L 1997-08/01
• Porsche 996 C4 3.4L 1997-08/01
• Porsche 996 C2 3.6L 09/01-2005
• Porsche 996 C4 3.6L 09/01-2005
• Porsche 996 C4S 3.6L 09/01-2005
• Porsche 997 MK1 Carrera 2 3.6L 2005-08
• Porsche 997 MK1 Carrera 2S 3.8L 2005-08
• Porsche 997 MK1 Carrera 4 3.6L 2005-08
• Porsche 997 MK1 Carrera 4S 3.8L 2005-08
• 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 Cayman 2.7L 987C 2006-08
• Porsche Cayman S 3.4L 987C 2005-08
• Porsche Cayman 2.9L 987C MKII 2009-12
• Porsche Cayman S / R 3.4L 987C MKII 2009-12       

With the tight tolerances of the M96/M97 engine platform, accurate wrist pin alignment is essential. A misaligned or improperly fitted gudgeon clip can cause catastrophic engine failure, including piston damage, cylinder scoring, or wrist-pin walk. This tool set ensures safe, controlled and professional-grade installation every time.

The kit includes an alignment tool, a pin driver, and an extension, providing everything required for correct gudgeon clip positioning during engine rebuilds.

What This Wrist Pin Fitting Tool Does

This specialist tool kit allows you to:

• Precisely align the piston and wrist pin before installation
  
• Insert the wrist pin smoothly and accurately using the dedicated pin driver
  
• Seat gudgeon clips securely without distortion or damage
  
• Reduce the risk of clip misalignment that can cause engine damage
  
• Ensure correct piston-to-rod positioning during assembly
  
• Work efficiently in confined spaces with the included extension tool

This complete set is essential for professional engine rebuilders and experienced enthusiasts.

Kit Contents
1× Wrist Pin Alignment Tool – Ensures perfect piston/rod orientation
1× Pin Driver – Applies controlled force to install wrist pins
1× Extension – Provides reach for difficult-to-access bores and bank positions

Engineered for accuracy, durability and repeatable performance.

Why Wrist Pin & Gudgeon Clip Installation Fails

Incorrect installation can lead to:

• Clip deformation due to poor tools or improper force
  
• Incorrect seating, allowing the pin to drift
  
• Cylinder scoring if a clip dislodges while running
  
• Piston damage from misaligned pins
  
• Stress fractures in circlips due to over-compression
  
• Assembly errors caused by limited access in boxer engines

These issues can result in full engine failure, making proper tools essential.

Why You Should Replace or Use a Precision Wrist Pin Installation Tool

Using a specialist wrist pin fitting tool ensures:

• Accurate and safe gudgeon clip installation
• Protection from catastrophic wrist pin walk
• Professional-grade rebuild results
• Reduced risk of damage during assembly
• Consistent, repeatable clip seating
• Correct wrist pin/piston/rod alignment
• Confidence when rebuilding M96/M97 engines

This tool set eliminates guesswork and ensures clean, precise engine assembly.