Gearwrench 164 Feeler Gauge Wire Spark Plug Gap Set 18 Pc

Product Description

The GEARWRENCH 164 is an 18-piece combination feeler gauge and wire spark plug gap set designed for measuring and setting ignition clearances. The set includes 12 flat blades and 6 wire gauges, covering a range from 0.010 inches to 0.045 inches (0.254 mm to 1.143 mm). This range covers the most common spark plug gap and ignition point specifications found in gasoline-powered engines. Technicians use this set to verify and adjust gap dimensions during tune-ups, distributor point service, and spark plug replacement. It is a compact, handheld tool that requires no power source and fits easily into a tool pouch or tray.

This set is suited for automotive and small-engine service work where precise ignition clearance measurement is required. It applies to spark plug gapping on standard and performance gasoline engines, as well as contact point adjustment on older ignition systems. The dual-format design — flat blades for feeler gauge work and wire gauges for round-gap spark plug measurement — makes it a single-tool solution for common ignition service tasks. It is appropriate for use in general automotive shops, fleet maintenance operations, and small-engine repair environments.

Key Features

• 18-piece set includes 12 flat feeler gauge blades and 6 wire gauges
• Measurement range of 0.010 inches to 0.045 inches covers standard ignition clearance specifications
• Dual-format design handles both flat-gap and round-gap measurement tasks
• Compact form factor suitable for field service and shop use
• Covers both inch and metric equivalents (0.254 mm to 1.143 mm)

Compatibility

Designed for use with ignition clearance applications requiring measurements between 0.010 inches and 0.045 inches, including spark plug gapping and contact point adjustment on gasoline-powered engines.

Installation Notes

This tool is used by automotive technicians, small-engine mechanics, and general service professionals. Always disable the ignition system and allow the engine to cool before servicing spark plugs or ignition components. Select the blade or wire gauge that matches the specified gap dimension and verify it passes through the gap with light, consistent drag. Do not force gauges through tight gaps, as this can bend the blades and introduce measurement error.