First, you need to use EN 46116 to install the valve stem seal, install the
Valve Spring, and the valve spring retainer and install EN 46110 above the applicable valve spring as shown. Then, please tighten the EN 46110 valve spring compressor nut, install the valve spring keepers, remove the EN 46110, disconnect the J 39313 from the compressed air source, and remove the J 39313. Finally, you should install the spark plugs, the rocker arms, and camshafts, remove the EN 46106 to prevent crankshaft rotation, and install the starter motor.