Time-Sert Sparkplug Repair

Professional sparkplug thread repair solutions for all engine types

Complete Sparkplug Thread Repair Solutions

Time-Sert sparkplug repair kits provide permanent solutions for stripped sparkplug threads in all engine types. Available in both washer seat and taper seat configurations with standard and aluminum insert options.

Time-Sert Sparkplug Repair Kits

Kit SizeKit Part NoIncludesWasher Seat InsertsTaper Seat Inserts
Length InchLength MetricStandard Part NoAluminum Part NoLength InchLength MetricStandard Part NoAluminum Part No
1/4"-32 RC Engine glow plugTS0142SPIncludes inserts0.1804.5TS01421
M10x1.0 StandardTS4010No inserts
M10x1.0 StandardTS4010-103Includes inserts (2) 9mm (3) 15mm0.3609.0TS40101
0.47212.0TS40102
0.60015.0TS40103
M10x1.0 StandardTS4010EXT-133Includes 5 inserts (2) 9mm (3) 15mm0.90523.0TS40105
M10x1.0 Deep HoleTS4010ENO inserts
M10x1.0 Glow PlugTS4010GPIncludes inserts
M10x1.25 Glow Plug Duramax 6.6 LitreTS5000Includes inserts0.65016.2TS10123ANFAluminium Special
M12x1.25TS4212NO inserts0.3609.0TS42121
0.60015.0TS42123
0.69017.5TS42125
M12x1.25 StandardTS4212-125Includes 6 inserts (2)ea 9, 15, 17.5
M12x1.25 Deep Hole KitTS4212ENO inserts0.86622.0
0.94524.0
M12x1.25 2008 Ford 3 valve kitTS4212HIncludes 5 inserts0.82721.0TS42126Special
M14x1.25TS44120.2707.0TS44121TS44121A0.2707.0TS44181TS44181A
0.3208.0TS44123TS44123A0.40010.0TS44183TS44183A
0.3709.4TS44125TS44125A0.62015.7TS44185TS44185A
0.43011.0TS44127TS44127A0.66016.8TS44186TS44186A
0.53013.5TS44113TS44113A0.95024.0TS44187TS44187A
0.60015.0TS44129TS44129A0.40010.0TS48181
0.66016.8TS44111TS44111A
0.90523.0TS44112TS44112A
M14x1.25 Deep Hole KitTS4412E
M18x1.5TS48150.40010.0TS48151
0.72018.3TS48153
7/8"-18TS47180.43011.0TS47181
0.78020.0TS47183

Washer Seat Inserts

  • For sparkplugs with gasket/washer sealing
  • Flat sealing surface at the top of the insert
  • Most common sparkplug configuration
  • Available in multiple lengths for different applications

Taper Seat Inserts

  • For sparkplugs with tapered sealing surface
  • Conical sealing surface matches sparkplug taper
  • No gasket required - metal-to-metal seal
  • Common in European and some domestic engines

Sparkplug Thread Repair Process

1. Tap the Hole

Tap the hole using the piloted step tap. Make sure the tap is wound well through the hole.

2. Countersink & Recondition Sparkplug Seat

Place the seat cutter over the shank of the tap. Using the wrench provided rotate the seat cutter to cut the countersink for the top of the insert and recondition the sparkplug seat area

3. Install Insert

Thread the Time-Sert insert into the hole using the insert driver tool until flush with the surface.

4. Lock Insert In Place

Once the insert has seated on the top flange, the insert driver tool will roll form the bottom few threads of the insert to lock it in place.

Standard Steel Inserts

Material: High-strength carbon steel (12L14)
Applications: Suitable for all engines
Temperature: Suitable for standard operating temperatures
Finish: Corrosion resistant coating

Aluminum Inserts

Material: High-grade aluminum alloy
Applications: Aluminum cylinder heads to prevent galvanic corrosion
Benefits: Thermal expansion compatibility with aluminum heads
Recommended: For all aluminum engine applications

Technical Specifications

Sparkplug Kit Contents

  • • Step Tap
  • • Counterbore Tool
  • • Wrench
  • • Insert Driver
  • • Inserts only if specified

Thread Sizes

  • • M10x1.0 (small engines)
  • • M10x1.25 (Duramax glow plugs)
  • • M12x1.25 (Ford applications)
  • • M14x1.25 (most common)
  • • M18x1.5 (large engines)
  • • 7/8"-18 (Imperial)

Applications

  • • Automotive engines
  • • Motorcycle engines
  • • Marine engines
  • • Small engines
  • • Industrial engines
  • • RC/model engines

Need Help Selecting the Right Kit?

Our technical team can help you identify the correct sparkplug repair kit for your specific engine application. Contact us with your engine details and sparkplug specifications.