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Injector Seal Resizer, .251 - Lisle

Part #: 34790

The Lisle 34790 Injector Seal Resizer, .251, is a precision-engineered tool designed for professional automotive and industrial applications. This specialized resizer is crucial for correctly installing Teflon seals on fuel injectors, ensuring they are compressed back to their engineered dimensions for an optimal, leak-free fit. It plays a vital role in maintaining the integrity and performance of modern direct injection systems.

Key Features

  • Precision Resizing: Accurately compresses new Teflon fuel injector seals to their proper outside diameter, facilitating correct installation into the cylinder head.
  • Durable Construction: Manufactured by Lisle, this tool is built to withstand the rigors of professional shop use, providing reliable performance over time.
  • Ensures Leak-Free Operation: Proper seal sizing prevents fuel leaks and helps maintain consistent fuel pressure for improved engine performance and efficiency.
  • Integral Component: This resizer is an essential part of the comprehensive Lisle 34850 Injector Seal Installer Kit.
  • Specific Sizing: Features a .251-inch (approximately 6mm) diameter for compatible injector seal applications.

Applications

The Lisle 34790 Injector Seal Resizer is indispensable for technicians servicing fuel injection systems across a broad range of vehicles. It is specifically designed for use with Teflon seals on Hitachi, Bosch, Continental, and Delphi fuel injectors. Common applications include:

  • GM Engines: Various 2010 and later GM engines, encompassing 1.4L, 1.5L, 2.0L, 2.4L, 2.5L, 3.0L, 3.6L, 4.3L, 5.3L, and 6.2L displacements.
  • Ford EcoBoost Injectors: Compatible with Ford EcoBoost injectors from 2011 and newer.
  • Subaru Turbo Engines: Suitable for 2014-2019 Subaru 2.0L and 2.4L turbo engines.

Specifications

  • Manufacturer: Lisle
  • Model Number: 34790
  • Seal Resizer Size: .251 inch (approx. 6mm)
  • Shipping Weight: 0.31 lbs
Special Order Contact For Details
List: $13.15 Save: $0.84

$12.31

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  • Model: 423958
  • Shipping Weight: 0.31lbs
  • UPC: 083045347903
  • Manufacturers Part #: 34790
  • Manufactured by: Lisle
  • Also Known As: LIS34790, LIS-34790

This product was added to our catalog on Tuesday 12 May, 2026.

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