TM 5-3805-258-24-1A I R I N L E T A N D E X H A U S T S Y S T E M2. Make an adjustment to the valve clearance onthe intake valves for cylinders 1 and 2. Makean adjustment to the valve clearance on theexhaust valves for cylinders 1 and 3.3.4.C Y L I N D E R A N D V A L V E I D E N T I F I C A T I ONTurn the flywheel 360° in the direction ofengine rot at ion. This will put No.4 piston attop center (TC) on the compression stroke.Make an adjustment to the valve clearance onthe intake valve for cylinder 3 and 4. Make anadjustment to the valve clearance on theexhaust valves for cylinders 2 and 4.5. After valve adjustment is correct, tighten thenuts for the valve adjustment screws to 28 ± 4N·m (22 ± 3 lb. ft.).T E S T I N G A N D A D J U S T I N GPROCEDURE FOR MEASURINGCAMSHAFT LOBESTo find lobe lift, use the procedure that follows:A. Measure camshaft lobe height (B) of oneexhaust and one intake lobe.B. Measure base circle (C) of one exhaust andone intake lobe.C.D.Subtract base circle (STEP B) from lobeheight (STEP A). The difference is actuallobe lift (A).Specified camshaft lobe lift (A) is 8.382 mm(.3300 in.).Maximum permissible difference between actuallobe lift (STEP C) and specified lobe lift (STEP D) is0.25 mm (.010 in.).C A M S H A F T L O BEA. Lobe lift. B. Lobe height. C. Bese circle.V A L V E A D J U S T M E NT( T Y P I C A L E X A M P L E)4-28
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