Jeep Engines - Oljeep

166 MOPAR PERFORMANCE PARTS13. Install the rocker arms and the bridge and pivotassemblies in the order removed. Loosely install thecapscrews for each bridge and tighten alternately oneturn at a time to avoid damaging the bridge. Tightenthe capscrews to 28.5 Nom (21 ft-lbs) torque.14. Install the cylinder head cover.15. Connect the hoses to the thermostat housing and fill thecooling system to the specified level. Refer to theservice manual for the proper procedure.16. The automatic transmission throttle linkage andcable must be adjusted after completing the cylinderhead installation. Refer to the service manual for theproper procedure.17. Install the temperature sending unit and connect thewire connector.18. Connect the fuel pipe and vacuum advance hose.Warning! Use extreme caution when the engine isoperating. DO NOT stand in direct line with the fan.DO NOT put hands near the pulleys, belts or fan. DONOT wear loose clothing.19. Operate the engine with the radiator cap off. Inspect forleaks and continue operating the engine until thethermostat opens. Add coolant, if required.20. Install the air cleaner.-FRONT___--- +--------*--- -/Figure 4 - 18--CYLINDER HEAD PERFORMANCE ANDASSEMBLY TIPSAlignment14J92W-38With the crankshaft and piston removed, check the alignmentof the combustion chamber over the cylinder bore. If it needsto be corrected, use offset dowel pins in the block.Piston-to-Head Clearance(Refer to Piston-to-Head Clearance, ‘Pistons and Rings’section of this chapter.)Oil RestrictionWe DO NOT recommend restricting oil to the cylinderheads. Leave all the passages stock size and be sure thatthey are unobstructed.Valve-to-Valve ClearanceValve-to-valve clearance is measured with both valves “onthe seat.” Being a wedge head design and having the valvesparallel allows this clearance to be minimum- around .020”to .030“. Check with your valve grinder to be sure. Formore information, refer to Valve Clearances, ‘Camshaftand Valve Gear’ section of this chapter.Measuring Cylinder Head Combustion ChamberVolumeCylinder head milling and cc’s are closely related and arevery important when blueprinting. Cylinder head cc’ing isthe volume of the combustion chamber in cubiccentimeters. Milling the head is to remove metal from thehead gasket surface to decrease the combustion chambervolume. This operation should only be done by anexperienced machine shop.EXHAUSTVALVEFigure 4 - 17. .,