Repair Kit for Threads and Spark Plugs GEKO G02792 — 16-piece set M14x1.25

GEKO G02792 is a 16-piece repair kit designed to restore damaged threads and service spark plug seats with thread size M14x1.25. The set contains tools and inserts intended for rethreading and securing spark plugs in engine cylinder heads, helping to re-establish reliable contact and torque retention where original threads are worn, stripped, or damaged. This repair kit is suited for maintenance and repair tasks in automotive engines that use M14x1.25 spark plugs.

Advantages

The kit offers a complete assortment of rethreading tools and threaded inserts sized for M14x1.25 applications, enabling restoration of thread geometry and correct spark plug seating without needing to replace the cylinder head. Components are organized to facilitate straightforward installation of inserts and to restore torque-holding capability. Using the correct-size inserts reduces the risk of further damage and provides a durable metal-to-metal thread interface suitable for repeated spark plug changes.

Suitable for

• Repairing stripped or worn spark plug threads in cylinder heads with M14x1.25 thread size
• Restoring thread engagement after cross-threading or corrosion
• Routine engine maintenance that requires replacing spark plugs while preserving original threads
• Automotive service shops and DIY vehicle repair where M14x1.25 spark plugs are used

Key specifications

• Thread size: M14 x 1.25
• Number of pieces: 16
• Includes: rethreading tools and threaded inserts for spark plug seats (tools and inserts specific to M14x1.25)
• Intended application: restoration of spark plug threads in engine cylinder heads

How to use

Identify the damaged spark plug thread and clean the area of debris, oil and corrosion before starting. Select the appropriate rethreading tool and follow the insert manufacturer's instructions to cut or reform the damaged thread to accept the insert. Install the threaded insert into the prepared hole using the provided installation tool or procedure, ensuring correct alignment and depth so the insert sits flush and the internal thread matches M14x1.25. After installation, confirm proper spark plug fit and torque to manufacturer specifications.

Usage recommendations

Use appropriate personal protective equipment and work in a well-ventilated area. If cylinder head material is severely damaged or cracked, consult a professional technician before attempting repair. Apply recommended thread lubricant or anti-seize compound on spark plug threads if specified by the engine manufacturer. Perform a torque check after the first engine run following repair to verify insert stability and proper sealing.