RANK 1.
OEMTOOLS 25647 5-Piece Spark Plug Saver, M14-1.25 Thread Reamer and Thread Inserts, Includes 3 Thread Inserts, 1 Reamer, & 1 Swaging Tool
- VERSATILE SPARK PLUG THREAD REPAIR KIT: OEMTOOLS Spark Plug Thread Repair Kit can be used to repair both taper seat and gasket seat spark plug assemblies; and with three length inserts and the included 14m x 1. 25 Thread Reamer—this kit can rethread nearly all 14M x 1. 25 spark plug sleeves
- EASILY SOLVES A FRUSTRATING PROBLEM: The Piloted Reamer Tap means no drilling is necessary, and you’ll achieve perfect alignment with the spark plug assembly you’re chasing or rethreading
- PERMANENT SPARK PLUG THREAD REPAIR SOLUTION: The positive mechanical locking feature on the thread inserts means the threads will never come out once the spark plug threads have been repaired
- INSTRUCTIONS INCLUDED: Spark plugs are often overlooked in routine maintenance, which means by the time you get around to spark plug maintenance, the issues are often compounded by years of carbon and gunk and other issues; OEMTOOLS’s Spark Plug Saver Kit includes easy-to-follow instructions that any would-be DIY mechanic can follow
- INCLUDED IN THE SPARK PLUG SAVER PACKAGE: 14M x 1. 25 Two-Step Piloted Reamer, three thread inserts of different lengths (. 625, . 4375, and . 3125 inches), and a 4 inch long swaging tool – everything you need for common spark plug sleeve rethreading jobs
- Fit type: Universal Fit
SaleRANK 2.
Spark Plug Thread Repair Kit, 14mm Cylinder Head Rethreaded Kit Repair Tools Gasoline Engine M14x1.25 Inserts and M16x1.25 Tap Kit
- INSERTS AND TAP: Including 10pcs M14 x 1.25 thread inserts and a M16 x 1.25 thread tap, is professional spark plug thread repair tool kit.
- STAINLESS STEEL INSERT: These thread inserts are made of stainless steel, with galvanized technology, wear and corrosion resistant.
- HIGH SPEED STEEL TAP: The thread tap is made of high speed steel material, which has high hardness and heat resistance.
- STANDARD THREAD: These inserts and tap have standard thread, the general size is suitable for repairing 14mmx1.25mm spark plug.
- APPLICABLE MACHINE: Tapping is efficient and labor saving, very suitable for gasoline engines, generators, diesel engines, etc.
SaleRANK 3.
Helicoil 5334-14 Save-A-Thread Thread Repair Kit M14 x 1.25
- This are woodworking project kit.Fit Type: Universal
- This are highly durable
- Made in China
- Package Dimensions : 6.5 L x 4.38 W x 0.75 H (inches)
RANK 4.
MARKETTY 38900 Two Valve Ford Triton Tool Kit, Foolproof Repair System, Spark Plug Thread Repair Kit Compatible with 4.6L, 5.4L and 6.8 V-10 Ford Triton Two Valve Engines
- Compatible with Ford Years 1996 to 2003: Please make sure the car model matches our products before purchasing. Designed to aide in repairing Two Valve Modular Cylinders Heads. A quality, foolproof repair system that is cost effective and fast. Our spark plug thread repair kit tapped M14-1.25 Inserts compatible with ford years 1996-2003, Part No. 389-100 Replacement Inserts. The kit is used on 4.6L, 5.4L and 6.8 V-10 Two Valve Engines.
- Package Including: Our spark plug repair kit including the M14-1.25 Inserts*8, Twist Drill, Screw Tap, Line up Guide, Cylinder Leak Tester, what's special is that we have two snap iron pieces. We offer two instructions, one is fixed in the packaging box and will not be lost, the other can be taken out for review, very flexible.
- Designed to Meet Your Specific Needs: Our spark plug cylinder repair kit featured complete and excellent quality. The drills, taps and line up guide are made of high quality thickened steel, individual pieces are highly tempered, with strong strength, sharpness and maximum durability. 8*M14-1.25 inserts has high hardness and the surface is also treated with black oxidation to prevent corrosion and rust, more robust than ordinary helicoils.
- Professional Thread Repair Kit: This 38900 thread repair tool addressed a regularly occurs damaged heads from blown spark plugs, replacing inserts. This cylinder repair tools is complete, specialty design, precise and perfectly adapted. The helicoil kit of choice for tool enthusiasts and industry professionals alike. PS: The rotary head of screw tap, twist drill usually needs to be coated with anti-rust oil for maintenance, if it is not used for a long time, anti-rust oil should be applied before storage to prevent rust during long-term storage.
- Customer Service: Please contact us if you have any problem. We have a professional customer service to solve the problem for you at first time.
RANK 5.
GallopMax 38900 Two Valve Triton Tool Kit Foolproof Repair System Spark Plug Thread Repair Kit Compatible with Ford 4.6 L, 5.4 L and 6.8 V-10 Two Valve Engines
- Introducing the 38900 Two Valve Tool Kit compatible for Ford Triton, the essential solution for your vehicle maintenance needs. Ensure compatibility with Ford model from the years 1991-2019 before purchasing. This spark plug thread repair kit includes tapped M14-1.25 inserts, part number 389-100 replacement inserts, designed specifically for 4.6 L, 5.4 L, and 6.8 L V-10 two valve engines.
- Address your blown engine spark plug issues with the 38900 Thread Repair Tool. Compatible with Ford Two Valve Modular Cylinder Heads, this high-quality tool ensures effective repairs by removing cylinder shavings, reaming out old threads, and rethreading with durable alloy steel inserts.
- Introducing our high-quality spark plug repair kit compatible for Ford vehicles, designed for durability and precision. This comprehensive kit includes 304 stainless steel 389-100 replacement inserts, a brass valve, and an aluminum alloy line-up guide for enhanced hardness. It also features a highly tempered speed steel screw tap and twist drill, along with a rubber pressure tube. Our foolproof repair system is both durable and rust-resistant, ensuring long-lasting performance and reliability.
- Elevate your repair process with our cutting-edge spark plug repair kit, meticulously crafted for unmatched efficiency and rapidity. Effortlessly conduct repairs on modular cylinder heads and seamlessly install inserts with pinpoint precision, all under the guidance of our detailed instruction manual.
- Introducing our Spark Plug Insert Installer Kit includes 8 M14-1.25 inserts (389-100), a Cylinder Leak Tester, a Reamer (similar to a drill bit), a Guide, a Tap HSS Steel Thread Repair Tool, 2 Snap Iron Pieces, a spare T style plug, a PTFE tape, and a Storage Case. It is compatible with Ford 4.6 L, 5.4 L, and 6.8 V-10 2-valve engines. For detailed model compatibility, please refer to the accompanying manual.
SaleRANK 6.
SHMZK Spark Plug Thread Repair Kit, M14×1.25 Inserts and M16×1.25 Tap Spark Plug Rethreading Set, Stainless Steel Thread Repair Tool Kit for Automotive Gasoline Engines Generators
- 【Premium Material】: The spark plug thread repair kit is made from high-quality stainless steel. Its high hardness and strength make it resistant to deformation and breakage and ensure great stable performance for easy drilling and repairing. Its exceptional durability ensures it can be used for a long time.
- 【Practical Function】: This practical and efficient tool kit is designed to help you quickly and effectively repair broken spark plug threads and prolong the product's service time. This repair kit offers a convenient solution, minimizing the need to visit an auto repair shop and saving time and money.
- 【Precise Dimensions】: Each kit contains 10 M14 × 1.25 thread inserts and 1 M16 × 1.25 thread tap, making it a professional thread repair kit. The tap shank diameter is approximately 0.39 inches, the full tap length is 3.74 inches, the tap blade length is 0.98 inches, and the thread insert length is 0.69 inches.
- 【Easy to Use】: First, drill out the broken thread. Second, clean the hole with a cleaning cloth. Then, slightly run the tap into the hole from the bottom tapered cutting edge to the correct depth. Next, clean the thread and check the insert's size. Finally, screw in the thread repair insert using the insertion tool.
- 【Wide Application】: Our spark plug thread repair kit is suitable for a wide range of applications, it is compatible with gasoline engines, generators, engines, and other machines. The product is an ideal thread repair solution, allowing you to easily and effectively restore broken spark plug threads.
RANK 7.
CalVan Tools 38900 Two Valve Ford Triton Tool Kit - Foolproof Repair System, Spark Plug Thread Repair Kit. Tools and Equipment
- Designed to aide in repairing Two Valve Ford Modular Cylinders Heads. A quality, foolproof repair system that is cost effective and fast
- High quality oversized steel alloy insert will repair other inserts that fail and has no ill effects from heat transfer
- Total labor time as short as 25 mins, For use on 4.6L, 5.4L and 6.8 V-10 Ford Triton Two Valve Engines
- For use on years 1996 to 2003, Part No. 389-100 Replacement Inserts
- nsert size: m14-1.25, Patented
- Ford spark plug insert installer designed to aide in repairing ford modular cylinder heads
- Quality, foolproof repair system that is fast, cost effective and simple to use
- Used to repair damaged heads from blown spark plugs, with an alloy steel insert
- Patented insert is oversized, heavy duty and can be used to replace previously installed inserts that have failed
- Includes six inserts; saves both time and money
RANK 8.
Performance Tool W86910 Spark Plug Repair Kit M14-1.25 Thread Size & HSS Tapered Reamer, (3) 503 Stainless Steel Inserts
- M14-1.25 thread size
- Tapered reamer replaces the need for a drill bit
- Restore threads to the original sizing
- Includes: (1) 4241 HSS Tapered reamer, (3) 503 Stainless steel inserts - 5/16 in., 7/16 in., and 5/8 in. lengths, and (1) Install/punch tool
RANK 9.
Spark Plug Thread Repair Kit, 28 PCS 4 Sizes High Speed Steel Tap and 5 Sizes Insert, All in One Repair Tools Set with Storage Case for The Most Trucks Cars Engines Broken Cylinders Repair
- [Highest Versatility] PONEYA spark plug restoration kit has the most complete range of taps and inserts in sizes. It is not only suitable for Ford, but also for most of the cylinder restoration work of vans, trucks and cars.
- [Highest Quality] The quality of the tapping greatly affects the success of the cylinder repair work. Unlike most carbon steel taps on the market, PONEYA's taps are made of high speed steel (HSS), which is hard and sharp, greatly improving the success rate of cylinder repair work.
- [Multiple Size Options] PONEYA spark plug repair kits are available in 5 sizes of inserts: M12x1x12.7, M12x1x17, M12x1.25x17, M14x1.25x17, M16x1.25x17. No matter what brand of engine you have, you can easily find the right size insert for it.
- [All In One Set] In addition to the tap and insert, the PONEYA spark plug repair kit comes with a detailed repair instruction manual, which will give you clear guidance whether you are experienced in repairing spark plugs or not. The kit also includes a free bottle of metal bonding glue to make the repaired inserts even stronger.
- [CUSTOMER SERVICE] If you are not satisfied with our products for any quality reason, please do not hesitate to contact us at any time. We are there for you 24 hours a day, 7 days a week, 365 days a year! We promise solving your worries in all aspects.
SaleRANK 10.
CLLOMAGY 38900 Two Valve Tool Kit for Ford Triton,Spark Plug Thread Repair Kit,Foolproof Spark Plug Repair System Compatible with Ford F150/250/350 E150/250/350 4.6L,5.4L,6.8L Two Valve Engine
- 38900 Two Valve Tool Kit for Ford Triton. Direct replacement for Ford 4.6L,5.4L and 6.8L two valve SOHC engines(NOT for 3V engines or DOHC).
- High quality spark plug repair kit for Ford: 304 stainless steel 389-100 replacement inserts + Brass valve + Aluminium alloy line up guide for high hardness + highly tempered speed steel screw tap and twist drill + Rubber pressure tube, durable and rust-resistant foolproof repair system.
- Fixed the blown engine spark plug issue: The 38900 thread repair tool is designed for repairing two valve modular cylinder heads for Ford from blown spark plugs. After blowing all the shavings in the cylinder, reaming&removing the old threads and rethreading a larger diameter with alloy steel inserts, making your car back on the road properly!
- The spark plug repair kit for Ford SOHC 2V engine: 4.6L 1998-2014 E150 E250/1992-2011 Crown Victoria + 4.6L 1991-2011 Lincoln Town Car + 4.6L 1992-2011 Mercury Grand Marquis + 5.4L 1996-2016 E150/E-Series + 6.8L 1997-2004 F250-550, F53/Motorhome. More model details pls see below description.
- Easy to use: The 38900 two valve spark plug tool kit for Ford makes the repair job very easy.-Cheaper and easier than replacing the whole engine/buying new cylinder heads. But pls follow the included instructions and watch some YouTube videos before installing.
- Spark plug insert installer for Ford including: The spark plug cylinder repair kit for Ford Triton includes 389-100 M14-1.25 Inserts*8, Cylinder Leak Tester, Reamer (similar to a drill bit), Line up Guide, Tap HSS Steel Thread Repair Tool, Snap iron pieces*2, Storage Case
RANK 11.
Spark Plug Thread Repair Kit, 16pcs M14 x 1.25 Tap Spark Plug Rethreading Set with Portable Case, Tap Stainless Steel Auto Spark Plug Repair Tool for Gasoline Engines, Generators(size:16pcs)
- High Performance: With a M16 x 1.25 x 70 mm long tap, you can expand the spark hole to fit the sleeve. A good tool kit for repairing damaged spark plug threads and extending spark plug life.
- Fitment: Suitable for repairing spark plug threads 14mm * 1.25mm.
- High-Quality: 16 highly useful and high-quality plug thread repair tools. These accessories are made of hardened steel and are strong and durable.
- Easy to Carry: All tools are organized in a blow-molded box to protect the components and be easy to carry and collect.
- Easy To Install: Installation hardware is included for easy and fast installation
RANK 12.
Camrusic Spark Plug Thread Repair kit, M10x1.0 Bolt, M12x1.0 Tap Stainless Steel Repair kit for Automotive Engine
- Professional & Universal: This is a professional universal reamer cylinder spark plug thread repair tool, and which is a comprehensive kit
- For Engines and Generators: Can make your maintenance work easier, effective and convenient, especially suitable for gasoline engines, generators, diesel engines and other machines
- Practical And Efficient: This is a very practical and efficient spark plug thread repair tool set, designed to help quickly and effectively repair damaged spark plug threads and prolong the service life
- Useful And Convenient: Universal size, suitable for repairing spark plug thread M10x1.0, very useful and convenient
- Stainless Steel Material: Good quality stainless steel material and galvanizing process ensure that the products you buy are durable
RANK 13.
Orion Motor Tech 38900 Two Valve Ford Triton Tool Kit, Spark Plug Thread Repair Kit with M14-1.25 Inserts, Foolproof Repair System Fits 1996-2003 Ford Triton 4.6L 5.4L 6.8L V10 Two Valve Engines
- Complete Spark Plug Repair Kit: This all-in-one kit from Orion Motor Tech includes a cylinder leak tester, line-up guide, twist drill, screw tap, six snap iron pieces, and eight M14-1.25 inserts, restoring damaged threads quickly and easily
- Effortless Thread Repair: This spark plug thread kit quickly fixes worn or stripped threads, allowing easy rethreading without the need to remove the cylinder head. Get your engine back to peak performance with minimal effort and cost
- Versatile Compatibility: Perfectly designed for Ford vehicles from 1996 to 2003 with 4.6L, 5.4L, and 6.8L V10 two-valve engines, this 38900 ford spark plug repair kit ensures a precise, hassle-free thread repairs
- Built to Last: Crafted from tough high-speed steel and AISI 1045 steel with a phosphate coating, this sparkplug repair kit handles tough repairs with ease while resisting corrosion, ensuring reliable and long-lasting performance
- Tips for Processing: Make sure to use a borescope to verify that the piston is lowered by at least 2" to 4" to prevent damage. Additionally, check valve closure with a cylinder leak tester and clean away any debris before proceeding
RANK 14.
ZKTOOL 14mm Cylinder Head Rethreaded Kit, Spark Plug Thread Repair Kit,14mm Reamer Cylinder Thread Repair Tool,Spark Plug Rethreader Kit,4 Thread Insert. M14 x 1.25
- Choice: The thread repair tool kit is a tool for spark plug repair. This tool does not require any difficult operation and is suitable for everyone. For the convenience of use, you can add some thread locking agent, (Rethread Aluminum Heads Only).
- Advantages: Chrome vanadium steel (CR-V) 14mm 12-point threaded reamer with a total length of 2.5 inches and four 3/8-inch, 7/16-inch, 1/2-inch and 3/4-inch carbon steel blades. Compared with similar products, we have optimized the quality. Will not be easily damaged.
- Operation: Repair and repair the chrome vanadium steel (CR-V) M14 x 1.25 internal thread size on the sleeve by cutting the thread, and repair the plug in the aluminum head. The socket includes a metal retainer for fixing the plug inside during installation and removal.
- Packaging: The re-threading kit includes a tapping reamer and 4 blades of different sizes and depths for your convenience.
- Service: We provide product package return and exchange service for a better customer experience. If you have any questions, please contact us, we are online 24 hours
RANK 15.
WINTOOLS 26pc Spark Plug Thread Repair Kit M14 x 1.25 with Metal Case
- Especially designed for fix Deep Plug Configuration.
- Extension tool can easy access to the bottom of plug groove.
- A nice tool kit for repair damaged spark plug threads and lengthen spark plugs service time.
- Made of high speed steel, these accessories are of strong strength and long durability.
- Fit for car, truck, cropper, diesel engine and gas engine.
SaleRANK 16.
ABN Spark Plug Thread Repair Rethreading Set, 14mm Metric – Rethreading Tool Kit – Comprehensive Taps, Inserts, & More
- REPAIR DEEP-SEATED PLUGS: The ABN Spark Plug Thread Repair Rethreading Set, 14mm Metric – Rethreading Tool Kit is a comprehensive and time-saving kit that incorporates taper and lug taps together with integrated ream to allow you to fix a stripped spark plug threaded port and repair deep-seated plug configurations
- VARIOUS APPLICATIONS: High-speed steel (HSS) ST14x1.25 M14x1.25 (14mm thread size) suitable for damaged spark plug threads to clean and rethread spark plug ports with either a tapered seat or a gasket seal type spark plug assembly on a lawn mower, car, or other vehicle engine; Stepped tap ensures correct alignment of cutter in existing spark plug hole; Extension tools allow easy access to the bottom of the plug recess (includes plug inserts)
- EASY TO USE: Cut a larger threaded hole in cylinder head with tap, screw insert into head, screw plug into insert, use expander to help seat insert by tapping with a hammer; Select insert that covers as much of the plug threads as possible to avoid carbon buildup (this can make unscrewing plug from insert difficult); Use grease on flutes and any cutting tool to catch shavings, clean often, and vacuum when finished (grease not included)
- EASY STORAGE: Heavy-duty 9.6” x 4.75” x 1.5” inch (24.4cm x 12.1cm x 3.8cm) metal carrying case with a plastic molded insert tray for easy transportation, safe storage, and quick organization
- PACKAGE CONTENTS: Package includes drill taps (14mm), tap holder, insert installer, wedge and handle, inserts, Allen wrench hex key, and storage case for your convenience
RANK 17.
NINEFOX Spark Plug Thread Repair Kit M12x1.25, Thread Spark Plug Thread Repair Kit, Efficiently Repair Damaged Spark Plug Threads in Gasoline Engines, Generators, Diesel Engines
- Dual Size Options: Option 1: 10PCS m12x1.25 thread inserts and 1pc m14x1.25 tap kit.Option 2: 10PCS m14x1.25 thread inserts and 1pc m16x1.25 tap kit choose the appropriate size based on your specific needs. Suitable for repairing 12mmx1.25mm or 14mmx1.25mm spark plug threads on gasoline engines, generators, and diesel engines.
- Versatile Kit: Includes 10 thread inserts and 1 tap in your choice of m12x1.25 or m14x1.25 thread sizes to repair both taper seat and gasket seat spark plug assemblies. Suitable for a wide range of applications, this repair kit is a must-have tool for automotive enthusiasts and professionals alike.
- Restore Optimal Condition: Repaired threads ensure the best installation of spark plugs, enhancing engine performance.Timely repairs minimize the risk of failures due to loose or detached spark plugs.
- Efficient Repair: Professionally designed tools that can swiftly repair damaged spark plug threads, significantly reducing repair time. Repair instead of replacing entire spark plugs or related components, minimizing downtime and costs.
- Durable Construction: Made from stainless steel inserts and high-speed steel taps, ensuring top performance even in harsh environments. With its robust design, versatility, and ease of use, this kit offers a practical and efficient solution for spark plug thread repairs.
- Easy to Use: Designed to simplify the repair process, making it accessible even for DIY enthusiasts. Compared to replacing entire spark plugs or components, using this kit for repairs can significantly reduce maintenance expenses.
- Portable and Compact: Designed for easy carrying and storage, ready to handle emergencies anytime, anywhere.
SaleRANK 18.
FLYPIG M14 x1.25 Carbon Steel Spark Plug Re-thread Repair Tool Tap Reamer Inserts Kit 14mm Spark Plug Thread Repair Kit
- Type: Spark Plug Rethread Thread Repair Kit. Material: Carbon Steel Color: Black Tap Size: 73 * 21mm / 2.87'' * 0.827'' Spark Plug Insert Thread Diameter: 15.6mm / 0.614'' . Spark Plug Insert Thread Pitch: 1.25mm / 0.049'' . Thread Inserts Length:11mm (0.43inch), 11mm (0.43inch), 13.2mm(0.52inch), 17.8mm (0.7inch). Tap Length:approx.73mm (2.87inch).
- 100% Brand new and high quality spark plug re-thread tap and inserts. for repair damaged spark plug threads and lengthen spark plugs service time. With four size of inserts for different 14mm thread size spark plugs.
- PERFECT SIZE: 14mm reamer with 12 points; 2.5-inch overall length; Use with 3/8-inch drive ratchet or wrench; Inserts sizes are 3/8-Inch, 7/16-Inch, 1/2-Inch, and 3/4-Inch; Tap is tapered to allow the tip to fit and rethread the hole in order for the coil to fit; Measure your plug diameter, thread, and pitch to see if this kit is compatible
- VARIOUS APPLICATIONS: Chrome-vanadium steel (CR-V) M14 x 1.25 internal thread size on repair sleeve suitable for damaged spark plug threads to clean and rethread spark plug ports on a BMW vehicle and some Nissan and Toyota engines; As long as the head is aluminum and the spark plug hole is straight with room to turn the tap using either a ratchet or wrench, this kit will allow you to repair plugs without removing the head
- Package Included: 1 * Re-thread Tap 4 * Spark Plug Inserts
SaleRANK 19.
Hihaha Outer/Universal Spark Plug Thread Repair Tools with M14x1.25 Inner Inserts and M16x1.25 Tap/High Speed Steel Tap Spark Plug/Durable/Metal / 1 Set/Gold Tone
- UNIVERSAL: The Spark Plug Thread Repair Tools Kit are suitable for most car, gasoline engines, generators, and diesel engines, etc
- PRODUCT INFORMATION: The Spark Plug Thread Repair Tools Kit are made of stainless steel, which is strong, and sturdy.
- DESIGN: Designed to make the car work well and improve work performance. The design is beautiful and elegant.
- INSTALLATION GUIDE:1. Match the intended thread repair kit; 2. Check the size on the tap and Inserts; 3. Drill out the damaged bore or thread for the thread you are intended to restore; 4. Clean the hole with cleaning cloth; 5. Slightly run the tap into the hole, from the bottom tapered cutting edge, to the correct depth by hand or on a machine tool of 3/8"" square drive; 6. Clean the thread; 7. Check the size of inserts, then screw in the threaded repair insert using the insertion tool.
- PACKAGE LIST: 10 Pcs M14 x 1.25 inner thread inserts ,1 Pc M16 x 1.25 thread tap and 1 Pc Plastic Storage Case, a vocational spark plug thread repair tools.
RANK 20.
DPTOOL 14mm Back Tap Spark Plug Thread Repair Tool M14x1.25 Thread Chase Tap for Repairing Threads and Preventing Metal Shavings from Entering The Cylinder
- Function: Used to fix severely cross damaged spark plug hole thread, cleaned up the threads without leaving scraps in the bore, no need pull cylinder head, no need coil insert.
- No Shavings Drop Into Engine: Used grease on the threaded, so that it will trap any metal shavings within it and pull out with the device rather than drop into the cylinder chamber, not worry about stuff going down into the engine
- High Quality Material: Made of high quality 42CrMo steel, its material is 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, and good low-temperature impact toughness. Therefore, it is more durable hard to damage, is a nice heavy and precise tool
- Tips: Put it straight through the hole, expand it, back thread it 3-5x. 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, Just be sure to go slow. When u hit a hard patch, back it up a little then go forward again. After repeated operations, it is easy to remove the remaining material
- 12 Months Warranty: We offer 12 months warranty, we will refund or replace if this 14mm back tap spark plug thread repair tool has any quality issue