Tillman EN-51955 Injector Seal Installer & Sizer Tool Set Alternative
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Tillman EN-51955 Injector Seal Installer & Sizer Tool Set – Aftermarket Alternative
This high-quality aftermarket tool set is designed as a direct alternative to the OEM GM-51955, offering precision and reliability for injector seal installation across a wide range of GM SIDI gasoline engines.
Compatibility:
- Injector Models:
- 55515113 (2.0L)
- 12733960 (2.7L)
- 12732623 (4.3L, 6.2L, 6.6L)
Product Overview:
Due to evolving emission standards, GM has transitioned from a 7.5 mm injector tip to a more compact 6 mm design. This change—driven by higher fuel pressures and tighter packaging requirements—affects SGE, LGE, and future V8 engines.
The EN-51955 tool set is essential for proper installation and includes:
- Two seal protectors for precise placement
- Seal pusher to prevent overstretching during installation
- Initial seal compressor to manage seal hardness
- Seal sizer to finalize the seal diameter at 6.5 mm for proper fitment into the cylinder head
Using this tool set ensures a secure seal and prevents damage that could lead to fuel or combustion pressure leaks.
Vehicle Applications:
Compatible with the following GM models and engines:
For the General Motors Tools Catalog, click here
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