Diplomat V8-318 5.2L VIN S 4-BBL (1983)
EGR Valve: Testing and Inspection
The CCEGR valve can be tested for proper operation by placing it in ice and cooling it to below 40° F. Using vacuum pump and gauge tool C-4207 or
equivalent, apply a vacuum of at least 10 inches or mercury to the valve nipple corresponding to the blue striped hose. If vacuum reading drops off more
than 1 inch in one minute, the valve should be replaced.
