Jeep Engines - Oljeep

CONTENTSVCOMPRESSION RATIO .................. 154Measuring 1/2" Down Fill Volume ........ 155PISTON RINGS ........................ 155Basic Piston Ring Preparation ........... 156PISTON PIN ........................... 156Removal ........................... 156Inspection .......................... 156Installation .......................... 156Offset Pins .......................... 157Pin Coatings ......................... 157Pin Oiling .......................... 157PISTON AND CONNECTINGROD ASSEMBLY ....................... 158Removal ........................... 158Inspection .......................... 159Cylinder Bore Measurement ............. 159Fitting Pistons-Bore Gauge Method ......159Piston Size Chart ..................... 159Fitting Rings ........................ 159Installation .......................... 160Cylinder HeadINTRODUCTION ....................... 162SELECTION ........................... 162CYLINDER HEAD REMOVAL ANDINSTALLATION PROCEDURES ........... 163Removal ........................... 163Cleaning and Inspection ................ 164Preparation .......................... 164Installation .......................... 165CYLINDER HEAD PERFORMANCEAND ASSEMBLY TIPS ................... 166Alignment .......................... 166Piston-to-Head Clearance ............... 166Oil Restriction ....................... 166Valve-to-Valve Clearance ............... 166Measuring Cylinder Head CombustionChamber Volume ..................... 166Block-to-Head Distortion ............... 167Spring Seats and Valve Guides ........... 168Diagnosing Valve Seat Insert Failure ...... 168Aluminum Head Threads ............... 169Weeping ............................ 169PORTED CYLINDER HEAD .............. 170Swirl Ports .......................... 170Porting ............................. 171Flow Bench ......................... 171Evaluating Cylinder Head Air Flow ....... 172Oversize Valve Seats and Guides ......... 174CYLINDER HEAD COVER ............... 175Removal ........................... 175Cleaning and Inspection ................ 175Installation .......................... 175Camshaft and Valve GearCAMSHAFT ........................... 176CAMSHAFT SELECTION ................ 177Racing Camshaft Selection .............. 177CAMSHAFT REMOVAL ANDINSTALLATION PROCEDURES ........... 178Removal ........................... 178Inspection .......................... 178Installation .......................... 178CAMSHAFT INSTALLATION TIPS ......... 179CAMSHAFT INSTALLATIONTROUBLESHOOTING ................... 180SPECIAL CAMSHAFT THEORIES ......... 180Camshaft Duration .................... 180Camshaft Centerline ................... 181Calculating Duration at Fifty ............ 184Base Circle ......................... 184VALVE GEAR .......................... 185General Valve Gear ................... 186Valve Gear Selection .................. 186VALVE GEAR PERFORMANCE ANDASSEMBLY TIPS ....................... 186SPECIAL VALVE GEAR THEORIES ........ 187Valve Gear Oiling .................... 187Valve Train Geometry ................. 188Dynamics ........................... 188VALVES ............................... 188Stainless Steel Valves .................. 190Valve Grinding (Valve Job) ............. 190Valve Timing ........................ 192Polished Valve Stems .................. 193Valve Stem Lash Caps ................. 193VALVE STEM OIL SEALS ................ 193VALVE GUIDES ........................ 194Valve Stem-to-Guide ClearanceMeasurement ........................ 194VALVE SEATS .......................... 194Valve Seat Refacing ................... 194VALVE SPRINGS ....................... 195Big Camshaft ValveSpring Considerations ................. 196Valve Spring InstallationPerformance Tips ..................... 196... l- - T I 7.