Ford Valve Clearance Check Diagram - Feeler Gauge Between Cam Lobe & Tappet 6500

This document is a single-page service illustration showing how to check valve clearance on an overhead-cam engine. The line drawing depicts a cam lobe positioned above a valve tappet, with a feeler gauge inserted between the base circle of the cam lobe and the top of the tappet (shim surface). Three callouts label the components: 'CAM LOBE IN POSITION' pointing to the camshaft lobe, 'FEELER GAUGE' pointing to the gauge blade being slid into the clearance gap, and 'VALVE TAPPET 6500' identifying the tappet (6500 is the Ford base part number group for valve tappets/lifters). The figure carries the Ford illustration reference number A12911-B in the lower right corner. The image was uploaded as part of a set of valve-train service illustrations (shim removal with compressed air, tappet compressor placement, tappet holder placement), suggesting it belongs to a valve clearance adjustment procedure for a bucket-and-shim style valvetrain. A reader learns the correct measurement setup: rotate the cam so the lobe is properly positioned (base circle facing the tappet), then measure the gap with a feeler gauge between the cam lobe and the tappet. No numeric clearance specifications, torque values, or year/model applicability are stated on the page itself.