Spark Plug Thread Repair Kit M14 5pc Reamer Tap & Inserts

A spark plug thread repair kit for cleaning and restoring damaged M14 spark plug ports during engine maintenance and repair work. Supplied as a 5-piece set, it includes a reamer tap and four inserts to help recover worn or crossed threads without replacing the whole cylinder head.

Used for garage work, workshop servicing and vehicle maintenance, this type of kit is handy when spark plugs have been overtightened, removed awkwardly or damaged during fitting. It suits mechanics and capable DIY users carrying out routine servicing, engine repairs or thread restoration on petrol engines where an M14 spark plug thread needs putting back into usable condition.

The set is built around a 14mm spark plug re-thread arrangement, with the tap used to clean and cut the damaged port before fitting the correct insert length. Four inserts are included in different lengths, giving you options depending on the depth of the original spark plug thread. That makes it useful when working across different engines or when you need to match the repair more closely to the existing port. For regular servicing work, having the common insert sizes in one kit helps keep the job straightforward and avoids unnecessary delays.

Spark plug thread repair kit specifications

• Thread size: M14 spark plug thread repair kit for damaged plug ports.
• Contents: 5-piece set with 1 reamer tap and 4 thread inserts.
• Insert lengths: Includes 3/8in, 7/16in, 1/2in and 3/4in inserts.
• Function: Cleans and rethreads spark plug ports before insert fitting.
• Use: Suitable for engine servicing, repair work and spark plug thread restoration.

A practical choice for regular maintenance and repair work.