Hromee engine air valve holder on spark plug area enables seal checks without full disassembly.
Hromee cylinder leakage test reveals audible leak path during compression for quick inspection.
Hromee GM Chevy LS1/LS3/LS6 compatibility for gasoline engines and performance checks.
Hromee durable rubber tube and brass fittings withstand high pressure during testing.
Hromee quick coupler 1-4 NPT connector simplifies setup.
Hromee gasoline engine compatibility for cars, boats, motorcycles, and ATVs.
Hromee engine air valve holder on spark plug area enables seal checks without full disassembly.
Hromee cylinder leakage test reveals audible leak path during compression for quick inspection.
Hromee GM Chevy LS1/LS3/LS6 compatibility for gasoline engines and performance checks.
Hromee durable rubber tube and brass fittings withstand high pressure during testing.
Hromee quick coupler 1-4 NPT connector simplifies setup.
Hromee gasoline engine compatibility for cars, boats, motorcycles, and ATVs.

Hromee Engine Air Valve Holder & Cylinder Leakage Tester – M12/M14 for GM LS1/LS3/LS6

Overview The Hromee Engine Air Valve Holder and Cylinder Leakage Testing Assistant is a precision tool designed...
Vendor: Hromee
Availability: In stock
£30.06
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Hromee engine air valve holder on spark plug area enables seal checks without full disassembly.

Hromee Engine Air Valve Holder & Cylinder Leakage Tester – M12/M14 for GM LS1/LS3/LS6

£30.06
Hromee engine air valve holder on spark plug area enables seal checks without full disassembly.
Hromee cylinder leakage test reveals audible leak path during compression for quick inspection.
Hromee GM Chevy LS1/LS3/LS6 compatibility for gasoline engines and performance checks.
Hromee durable rubber tube and brass fittings withstand high pressure during testing.
Hromee quick coupler 1-4 NPT connector simplifies setup.
Hromee gasoline engine compatibility for cars, boats, motorcycles, and ATVs.

Hromee Engine Air Valve Holder & Cylinder Leakage Tester – M12/M14 for GM LS1/LS3/LS6

£30.06
Description
Description
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Overview

The Hromee Engine Air Valve Holder and Cylinder Leakage Testing Assistant is a precision tool designed for gasoline engines that use M12 or M14 spark plugs. It helps you pressurize the cylinder to hold valves closed during oil seal replacement, so you can work more efficiently without a full engine teardown. When the tool sits in the compression stroke, you can listen for air leakage to identify potential issues and plan maintenance with greater confidence.

This accessory suits GM Chevy LS family engines (LS1, LS3, LS6) and similar gasoline applications. You must remove the spark plug before installation. Not intended for diesel engines.

How it works

  • Attach the tool to a spark plug position using M12 or M14 threads.
  • Connect to an air source and pressurize the cylinder within a controlled range.
  • Listen for leaks to locate affected parts without dismantling the engine.

Key features

  • Durable rubber tube and brass fittings resist wear, corrosion, and abrasion while delivering stable connections.
  • 300 psi / 20 bar pressure tolerance helps maintain a seal and avoids accidental drops of parts into the combustion chamber.
  • Includes a 1/4" NPT air quick coupler for fast, convenient setup.

Technical notes and compatibility

Working pressure range: 30 psi to 110 psi (2 bar to 8 bar). The tool is designed for gasoline engines such as cars, trucks, boats, motorcycles, and ATVs. It should not be used on diesel engines.

Benefits in everyday use

  • Potential time savings by reducing the need for full disassembly when resealing valves.
  • Clear, audible indications of leakage paths help you plan targeted maintenance.
  • Compatibility with common GM Chevy LS1/LS3/LS6 engines supports hobbyists and pros alike.

With thoughtful design and robust materials, this tool aims to support careful, informed maintenance decisions. While it suggests useful outcomes, results may vary by engine condition and usage context.

FAQ

Q: What engines and plugs does the toolkit support?

A: Designed for gasoline engines with M12 or M14 spark plugs; not suitable for diesel engines.

Q: How do I use the tool for valve testing?

A: Remove the spark plug, attach the tool, connect to air, pressurize (30–110 psi), and listen for leaks to guide maintenance.

Shipping & Return
Shipping & Return
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Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Shipping

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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