# Thread repair kit for spark plug seats, högert technik HT8G405, 2 pcs

**URL:** https://aio.lv/en/product--hogert-technik-ht8g405--12239929
**Data updated:** 2026-03-30 12:54 (EEST)
**Category:** Tool kits and accessories
**Manufacturer:** högert technik
**Manufacturer code:** HT8G405
**EAN:** 5902801362149
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

Thread repair kit designed for restoring damaged spark plug seats in engine cylinder heads. Model HT8G405 by högert technik includes 2 repair inserts to re-establish correct M-type spark plug thread engagement, helping to repair stripped or worn threads without replacing the cylinder head. Suitable for workshop and roadside repairs on petrol engines where spark plug seat threads are compromised.

## Long description

Thread repair kit for spark plug seats, högert technik HT8G405, 2 pcs is a practical tool set intended to restore damaged spark plug seat threads in engine cylinder heads. The kit contains two repair inserts designed to recreate the original M-type spark plug thread engagement, allowing reinstallation of spark plugs without the need to replace the cylinder head. It is compatible with typical petrol engine repair operations and can be used in both workshop and roadside scenarios where seats have been stripped or worn.
Advantages
The repair inserts provide a durable threaded surface that restores correct spark plug seating and sealing. The kit is compact and contains two inserts, which simplifies carrying spare parts and performing two repairs or having a backup. Using inserts avoids costly cylinder head replacement and reduces downtime. Components are designed for mechanical stability under normal engine operating conditions and to facilitate a straightforward installation process.
Suitable for
 Repairing stripped or damaged spark plug threads in petrol engine cylinder heads
 Workshop maintenance and engine servicing tasks
 Roadside emergency repairs where quick restoration of spark plug seating is required
Key specifications
 Includes two threaded repair inserts suitable for re-establishing M-type spark plug threads
 Designed for use in petrol engine cylinder heads
 Intended to restore mechanical thread engagement and sealing for spark plugs
 Compact kit size suitable for workshop toolboxes and mobile repair kits
How to use
Install the repair inserts following standard thread repair procedures: prepare the damaged hole by cleaning and, if necessary, reaming to the specified diameter, then cut or form the internal mating surface required for the insert. Insert and secure the repair piece according to the included fitment method so that the new thread aligns and seats the spark plug correctly. Ensure proper torque values are applied to spark plugs after repair and verify sealing and compression as part of post-repair checks.
Usage recommendations
Use appropriate tools for drilling and tapping where needed, and follow engine manufacturer torque and sealing guidelines. Inspect the cylinder head for cracks or other damage before using the insert, and perform a compression or leak-down check after repair to confirm correct restoration of the spark plug seat.

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### What is the warranty period?

All högert technik products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized högert technik service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

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