AIR INLET AND EXHAUST SYSTEMTM 5-3805-263-14&P-2VALVE CLEARANCENOTE: Valve clearance is measured between therocker arm and the valves.TESTING AND ADJUSTINGVALVE CLEARANCE CHECK: ENGINE STOPPEDExhaust............022 to 028 in. (0.56 to 0.71 mm)Intake...............012 to .018 in. (0.30 to 0.46 mm)NOTE: When the valve lash (clearance) is checked,adjustment is NOT NECESSARY if the measure-ment is in the range given in the chart for VALVECLEARANCE CHECK: ENGINE STOPPED. Ifthe measurement is outside this range, adjustment isnecessary. See the chart for VALVE CLEARANCESETTING: ENGINESTOPPED, and make the set-ting to the nominal (desired) specifications in thischart.VALVE CLEARANCE SETTING: ENGINE STOPPEDI n t a k e . . . . . . . . . . . . . . . . . . . . . . . . .015 in. (0.38 mm)E x h a u s t . . . . . . . . . . . . . . . . . . . . . . . ..025 in. (0.64 mm)1. Put No. 1 piston at top center (TC) on thecompression stroke. Make reference to FIND-ING TOP CENTER COMPRESSION POSI-TION FOR NO. 1 PISTON.2. 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. Turn the flywheel 360° in the direction of en-gine rotation. This will put No. 4 piston at topcenter (TC) on the compression stroke.4. Make an adjustment to the valve clearance onthe intake valve for cylinder 3 and 4. Make anadjustment to the valve clearance on the ex-haust valves for cylinders 2 and 4.5. After valve adjustment is correct, tighten thenuts for the valve adjustment screws to 22 ± 3lb. ft. (28 ± 4 N•m).1-60
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