n38 wiiiys M t rs WILLYS JEEP 1954-55 CONTINUED FROM PRECEDING PAGE *+REAR MAIN OIL SEAL PRODUCTION CHANGE—Neoprene type seal replaces rope type. See Willys Special Data. Bearing Adjustment: None (no shims). Replace bearings. Do not file bearing caps. See Crankshaft Servicing instructions in Willys Special Data. NOTE—Engine must be removed from chassis for bearing replacement and crankshaft servicing. Replacement Bearings: Furnished Standard & .010", .020" .030" Undersize. End Thrust: Taken by flanged faces of # 1 (front) bearing. Adjustable by adding or removing shims between crankshaft sprocket thrust washer and sprocket. Endplay—.004-.006". ^FLYWHEEL RING GEAR REPLACEMENT CAUTION: Different flywheels used as follows: 97 teeth (CJ-3A with Old Type Std. Bendix Drive); 124 teeth (CJ-3A through Serial Number 30973 with overrunning clutch type drive); 129 teeth (All Models after CJ-3A, Serial No. 30973 with Bendix "Folo-thru" type drive. CAUTION—Replacement ring gear must have the same number teeth as the original. CAMSHAFT: Four bearing, helical gear drive. Journal Diameters—#1 2.1855-2.1860", # 2 2.12152 1225". # 3 2.590-2.600", # 4 1.6225-1.6230". Bearings—Removable steel-backed, babbitt-lined bushing (front),machined in crankcase (all others). Clearance—.001-.0025". Service limit .006" (front), .008" (all others). Camshaft Removal—See Willys Special Data. End Thrust: Taken by thrust plate behind camshaft gear Endplay controlled by spacer between camshaft gear and shoulder on shaft Endplay can be increased by installing shim between spacer and shaft, or decreased by dressing off spacer NCTE - Inner beveled edge of spacer must be toward crankcase Endplay—.003-.0055". Timing Gears: Crankshaft gear, steel. Camshaft gear, fibre with steel hub. Gear Backlash—.000-.002". Camshaft Setting: Mesh marked tooth of camshaft gear with marked space (between teeth) on crankshaft gear. VALVES: Valve Intake Exhaust Valve Intake Exhaust ("L" Head Engine) Head Diam. Stem Diam. Length 1 17/32" 373" 5 51/64" 1 15/32" 3725" 5 51/64" Seat Angle Lift Stem Clearance —.45° 23/64" 0015-.00325" 45° _ 23/64" 0025-.0045" Valves CT" Head Engine) Valve Head Diam. Stem Diam. Length Intake 2" 3733-.S738" 4.937" Exhaust 1 15/32" 371-.372" 5.909" Valve Seat Angle Lift Stem Clearance Intake 45° 260" 0007-.0022" Exhaust 45° 351" 002-.00375" k-EXHAUST VALVES ("¥" HEAD ENGINE) NOTE— Thompson "Roto-Valve" or Eaton "Free Valve" rotators used. Valv Guides ("L" Head Engines): Removable type. Remove guides from above with puller, install new guides with driver or press guides down in place to following dimensions: Intake Guide—Top of guide 1 5/16" below top face of block. The shorter, smaller-diameter section end of guide should be up. Exhaust Guide—Top of guide 1" below top face of block. Taper end (counter-bored end) of guide should be up. Valve Guides ("F" Head Engine): Removable type. Drive guides out with Tool W-240. To install, use W-240 with correct adapters to install guides: Intake Guide—Drive guide in with taper end toward valve seat until inner end flush with port wall at guide hole. Exhaust Guide—Drive guide down in block with taper end up toward valve seat until upper end 1" below top face of cylinder block. Valve Springs: CAUTION—Intake valve springs on " F " Head Engines are different than other valve springs. See Spring Data below. Valve Springs ("L" Head Engine) Free Length—2*/2" (Intake and Exhaust). Intake & Exhaust Spring Pressure Length Valve Closed 53 lbs 2 7/64" Valve Open 120 lbs 1%" Valve Springs ("F" Head Engine) Free Length—1 31/32" (Intake), 2V2" (Exhaust). Intake Spring Pressure LengfBi Valve Closed 73 lbs. 121/32" Valve Open 160 lbs. 13/8" Exhaust Spring Pressure Length Valve Closed 53 lbs. 2 7/64" Valve Open 120 lbs. 1 3/4" Valve Lifters: Mushroom type operating in reamed holes in block. Serviced by installing oversize lifters. Lifters furnished .004" oversize. Lifter Diameter—.6240-.6245". Lifter Clearance—.0005-.002". NOTE—Camshaft must be removed for lifter removal and replacement. VALVE TIMING Tappet Clearance: ("L" Head Engine)—016", all valves hot or cold. ("F" Head Engine)—.018" (Intake), .016" (Exhaust —With "Thompson RotoValve"). .012" (Exhaust—With "Eaton Free Valve"). Adjust "F" Head Engine valves with engine cold. NOTE—Adjusting screws are self-locking type. Valve Timing: See Camshaft Setting above. Intake Valves—Open 9° BTDC. Close 50° ALDC. Exhaust Valves—Open 47° BLDC. Close 12° ATDC. Valve Timing Check—Adjust No. 1 cylinder Intake* valve lash to .020" ("L" Head Engine). .026" ("F" Head Engine) with tappet resting on low side of cam lobe. Rotate crankshaft until No. 1 cylinder is coming toward top of cylinder on exhaust stroke, then continue to rotate crankshaft until No. 1 intake tappet is JUST TIGHT against valve stem indicating that valve is about to open. Check position of ignition timing mark on crankshaft pulley (5° BTDC) and estimate crankshaft position (5° mark should be approximately XA" before reference point on timing gear cover). Reset tappet clearance to correct running clearance as given above. LUBRICATION -ENGINE OILING SYSTEM: See "Engine Lubrication" und r OILING SYSTEM in Willys Sp cial Data. Crankcas Capacity • 4 qts. Normal Oil Pr ssure • 35 lbs. at 35 MPH. Oil Pressur Regulator—Under plug on side of housing. Opens at 40 lbs. Adjustable by addgump lg or removing shims located above spring in plug. Oil Pump: Rotor type pump mounted on left side of crankcase. Oil Pump Overhaul—See Willys Special Data. Oa Filter: Purolator. On cylinder head bracket at right front corner of cylinder head with oil outlet connected to timing gear cover. *>CAUTION—Filter should be drained at each crankcase oil change (2000 mile intervals) and filter element replaced every 8000 miles (normal service). Oil Pressure Gauge: (CJ-3A)—Auto-Lite No. 121250-A; (Early CJ-3B)—Auto-Lite No 11987-A; (Late CJ3B & CJ-5)—Auto-Lite No. 121250-A. Bourdon tube type, not electric C O O L | N G Cooling System: Pressure type with pressure valve (relief valve) in filler cap. Capacity—11 qts. (12 qts. with Heater). Pressure Valve—Radiator filler cap. Opens at 7 lbs. Water Pump: Centrifugal, packless, ball bearing type. See Water Pump in Willys Special Data. Removal—Loosen and remove drive belt, disconnect hose. Remove pump mounting screws, lift out pump Belt Adjustment—See Generator Belt Adjustment. Thermostat: Harrison. In water outlet elbow m cylinder head. Starts to open at 151 °F (148°F mm.). Temperature Gauge (Exc. CJ-5): Auto-Lite No. 12149-A (CJ-3A); No 11986-A (Early CJ-3B); No. 12149-A (Late CJ-3B). Bourdon tube type Not electric Temperature Gauge (CJ-5): King-Seeley "CV" (Constant Voltage) electric type Dash Unit—K-S No 46832 (with 100 MPH Speedometer). No. 46833 (with 80 MPH Speedometer) Engine Unit—K-S No. 44230. CLUTCH Auburn 8501.23 & 8501-39 or Rocktord M d I 8KRM. Used with Borg Si Beck driven member. Single plate, dry disc type. See Clutch Section for complete data. Facings—Woven asbestos. I.D. 5YQ". O.D. 8V2". Thickness .135" (.132-.138"). Pedal Adjustment: Set pedal free travel to 1" (to provide 1/16" clearance between release bearing and clutch release levers). Adjust length of clutch control cable at clevis Screw Cable end in or out of clevis. Tighten locknut Removal: Remove transmission (Transmission & Case Assembly), see below Remove flywheel bell housing. Mark clutch pressure plate and flywheel to insure installation in same position Remove clutch cover screws evenly to remove spring pressure, then remove clutch assembly and driven member. TRANSMISSION Warner Model AS1-T90C (Floor Mounted Gearshift). Three speed type. Constant-mesh, synchromesh, helical gears (second & high), sliding spur gear (low & reverse). See Transmission Section for complete data. Transfer Case: Spicer or Warner. Two-speed auxiliary transmission and front-wheel drive unit mounted on rear of transmission case. Separate control levers provided for Low-High range (right hand lever), and front-wheel drive engagement (left hand lever). See Transmission Section for complete data. C NTINUED ON NEXT PACE
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