Relioky Valve Adjustment Tool 10mm Jam Nut with Angled Feeler Gauge — Slotted Stud Driver, Long Handles

A compact, all-in-one valve lash tool that loosens and tightens 10mm jam nuts and checks valve clearance with an included angled feeler gauge.

Relioky designed this valve adjustment tool to streamline routine valve-lash checks and adjustments on Honda, Toyota, Nissan and other Japanese engines that use 10mm jam nuts and slotted adjustment studs. Built from rugged materials and engineered for accurate engagement, the tool combines a jam-nut wrench, a slotted-stud driver with a view window, long leverage handles, and an angled feeler gauge (0.005–0.020") so you can perform service with fewer tools and less fumbling.

How does this tool make valve clearance adjustments easier?

The integrated layout removes the need to juggle separate wrenches, screwdrivers and feeler gauges. A slotted driver aligned through a small inspection window lets you visually confirm the screwdriver blade’s position for precise contact with the valve stud, and the 7-1/2" side handles give extra leverage for stubborn jam nuts.

• One-piece design reduces tool swaps and speeds the job
• Inspection window shows blade alignment for accurate engagement
• Long handles provide leverage for tightening or loosening jam nuts
• Includes angled feeler gauge covering common lash sizes (0.005–0.020")

Will this fit my car’s valves and jam nuts?

This tool is made specifically for engines that use 10mm jam nuts and slotted valve adjustment studs, which are common on many Honda, Toyota and Nissan engines. It’s not universal for all vehicles, so check your engine’s jam nut diameter and stud style before purchasing.

• Compatible with 10mm jam nuts and slotted adjustment studs
• Designed for many Honda, VTEC, Toyota and Nissan models
• Not suitable for larger or non-slotted valve studs
• Works for both intake and exhaust valve adjustments

What’s included and what precision can I expect?

The package contains the Relioky valve adjustment tool and an angled feeler gauge calibrated from 0.005" to 0.020". The tactile design and visual blade window help you seat the driver cleanly, while the gauge provides the common thicknesses used for checking valve lash without needing additional micrometers.

• Valve adjustment tool with jam-nut wrench and slotted stud driver
• Angled feeler gauge (0.005"–0.020") for standard lash checks
• Inspection window improves blade positioning accuracy
• Durable construction for repeated garage use

How should I use and care for this tool?

Use the tool on a cool engine following your vehicle’s service manual lash specifications. Keep the feeler gauge clean and store the tool in a dry place to prevent corrosion; occasional light lubrication of moving parts will extend life and maintain smooth operation.

• Follow your manufacturer’s clearance specs and procedure
• Clean gauge blades after use and wipe tool dry before storage
• Apply light oil to pivot points if the tool stiffens
• Use proper torque practices when tightening jam nuts to avoid overtightening

Who is this for: The Relioky Valve Adjustment Tool is aimed at DIY mechanics, home garage enthusiasts and professional technicians who work on Japanese engines with 10mm jam nuts and slotted valve studs. If you perform routine valve clearance inspections or prefer an integrated tool to reduce time and errors during adjustments, this compact kit provides the essential functions and feeler sizes for typical maintenance tasks.