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Steps on how to use
1. Clean the tool surface and apply grease
- When using, first wipe the threading tap, then apply a little grease (or use anti seize agent) on the threading device.
2. Turn the tool patiently and carefully
- Put it straight through the hole, expand it, don't put at widest setting on first try.Slowly work your way wider and wider with each tap. After slowly widening it out over 4 taps, Then reverse it in reverse, especially when it started getting tougher to turn, turning from side to side from time to time, at the same time, during the whole process, the force should be moderate, not too high or too low, and maintain good patience and caution. In this way, after multiple turns, the debris will enter the hole of the tool and then be pulled out.
3. Clean up metal shavings
- After the residual substance is pulled out by the tool, turn the nut at the handle to make the drill bit of the tool retract, open the crack at the thread, and clean it. Then turn the nut in reverse to restore the tool head to its original state. Then continue to apply a little grease to the thread.
4. Repeat operations
- Continue to insert the hole for rotation, so that the remaining residue again into the crack, allowed to cut the threads from the inside out and not worry about stuff going down into the engine. After several patient operations, the spark plug thread can be successfully repaired.
Function
- Designed to repair damaged spark plug hole thread, clean the threads and leave no shavings in the holes
Material
- Made of high quality 42CrMo steel, equivalent to 4140 steel, with high strength and toughness, good hardenability, no obvious tempering brittleness, high fatigue limit and multiple impact resistance after quenching and tempering, as well as good low temperature impact toughness, is a good heavy-duty precision tool
Unique Advantages
- No metal filing into the engine
- No need to pull cylinder head
- No coil insert needed
Special Design
- The unique design of the crack at the thread of the tool allows the tool to absorb the debris in the process of use, preventing it from falling into the engine and ensuring the safety of the engine
Two Different Models of Thread Chase Tap
The spark plug thread repair tool can be matched with a wrench and is more convenient to use. There are mainly two size:
- 138mm Short M14x1.25 spark plug thread repair tool
- 268mm Long M14X1.25 spark plug thread repair tool
Tips for Use
- just don't tighten the knurled knob too much. As you're threading it out, loosen the knob if it starts to feel tight, and repeat many times.
Greg M
2025-06-05 11:36:18
This tool just saved me a lot of money! Worked great
Fred
2025-05-02 13:14:48
When I opened this box, I was stunned by the manufacturing quality of this tools set. I have only had one occasion to use it since I purchased it (and repaired the damaged thread of a very expensive brake caliper). Really worth the money.
Joshua Bayly
2025-03-22 10:43:37
The tool works okay, the knurled grip makes it more difficult to work with then if it had a something that could be gripped with a wrench or something like that. One of the tools that was sent in the pack was missing that piece.
L. Chris Q
2025-01-17 18:19:17
I used this to restore the threads on a 1989 Volvo 240 wagon. The previous owner had cross threaded the spark plug into cylinder #3 about 1/2 way and left it there. I couldn't use a traditional thread chaser while the head was on the car. I was able to insert this fully into the cylinder and then expand the tool out to fit the undamaged threads at the bottom of the hole. I then turned the tool out to roll the threads back into place. Took three cycles to fully be able to expand the tool to full diameter. The spark plug threaded easily into the hole when complete and was a good fit. Did NOT overcut threads etc. EXTREMELY satisfied with the outcome. Saved me a day to R&R the head. Would recommend to anyone struggling in a similar situation.
Martin silva Jr
2025-01-12 16:11:04
tool just as described. Instructions are great and easy to follow. I used it on a suzuki gsx-r600. perfect fitment great tool to add to my tool box
c.mem
2024-12-11 13:06:20
i had a striped plug threat on my snowblower caused by carbon build up on tip of plug that damaged aluminum head, I tried this tool to no success. ended up with hole to big and not strait ?? don't recommend this on a aluminum head,
Richard J Hartline
2024-11-27 18:18:26
This tool saved my rear end by reconditioning the threads on a spark plug hole in an aluminum head. It’s a much better design than the traditional chase that pushes the debris into the engine.
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