How To Use a Feeler Gauge

Ari Henning demonstrates how feeler gauges are used to obtain precise clearance measurements.

Feeler gauges are invaluable for measuring valve clearances and other critically small gaps. Do you know how to use a feeler gauge properly? In this video from the MC Garage we'll show you the correct technique for wielding these thin blades and even give you an example of what the proper amount of drag feels like.