Lisle 34720 Injector Seal Installer Kit, 8 pc - Precise Teflon Seal

In this review the Lisle 34720 Injector Seal Installer Kit is assessed for technicians and experienced DIYers who service modern fuel injectors. The bottom line: it is a focused, professional-level toolset for replacing Teflon seals on many Hitachi, Bosch, Continental and Delphi single and double sealed fuel injectors, and it speeds and simplifies a fiddly task. The kit's pilot cones, installers and sizer let the user start, push and compress seals into the injector groove with controlled motion, so installers spend less time fumbling and more time getting a reliable seal.

Key Features

• Broad injector compatibility: Works with most Hitachi, Bosch, Continental and Delphi single and double sealed injectors so one kit covers many inlet types.
• Factory-style seal installation: The pilot cone and installer let you start and push the Teflon seal over the injector tip to seat it precisely into the groove.
• Sizing for correct OD: The sizer compresses the seal back to correct outside diameter so the injector can be installed into the cylinder head without damage.
• Applications for modern engines: Supports many GM, Ford and Subaru engines including turbo 2.0L and 2.4L Subaru units and a range of GM engines from 1.4L to 6.2L.
• Professional feel and value: Customers report the kit performs like a shop tool, making the job quicker and reducing the chance of seal damage during installation.

Who It's For

The kit is best suited to automotive technicians, independent shops and experienced DIYers who regularly replace fuel injector seals on vehicles that use Hitachi, Bosch, Continental or Delphi injectors, including many GM, Ford and Subaru engines. If you service modern direct injection or high-pressure systems, the installer and sizer provide a controlled way to handle delicate Teflon seals.

It is less useful for casual owners who rarely touch injectors or for vehicles that use proprietary injector seal systems not listed in the applications. Buyers who need a complete injector rebuild kit with o-rings, electrical connectors or replacement injectors should look for a more comprehensive service set.

Pros & Cons

Pros

• Works well on high-pressure injectors and feels like a professional tool.
• Good fit across many modern Ford, GM and Subaru engines, reducing part mismatches.
• Improves ease of installation and reduces chance of seal damage when used correctly.

Cons

• Seal protection feedback is mixed, so care and proper technique are still required to avoid nicks or improper seating.

Specifications

Our Verdict

The Lisle 34720 is a pragmatic, cost-effective tool for anyone who replaces Teflon seals on the specified injector families. It speeds installation, delivers a professional result when used properly and covers a wide range of modern GM, Ford and Subaru engines, so it represents good value for technicians and serious DIYers who want consistent seal fitment.

Frequently Asked Questions

Will this kit work on direct injection Ford ECO injectors?
The kit is reported to work on many Ford ECO injectors with direct injectors, but confirm injector style before purchase.

Does the kit include replacement seals?
No, the kit installs and sizes Teflon seals but does not include replacement seals; source seals separately for the specific injector.

Can a homeowner use this safely?
Yes, an experienced DIYer can use it safely, but proper technique is required since seal protection results were mixed in customer feedback.