The only way to be sure clearance is correct is to GAUGE IT!
Check all types of guides for size and roundness FAST. Set up and measure valve guide IDs quickly and easily. The complete set includes 3 probes (.312″, .344″ and .375″), a hex wrench, setting fixture, valve guide gauge and metal storage case with spaces for all components. Dial calibrated in.0002″ increments.
Components also available individually (see below).
View or Download the Sunnen Valve Guide Operating & Maintenance Instructions