Periodically reinstall your ring in the bore-always match each ring to a specific bore, and do not change its location-and measure the gap with a feeler gauge until you get the gap you're looking for.

Use a honing stone to knock off any burrs you've created on the edge of the rings. Just be careful not to round off the ends, which will allow cylinder leak-down. Reinsert each ring into the bore it has been sized for, and leave it there until you're ready to install them on the correct pistons. This will ensure they don't get mixed up.

It's time to install the camshaft. Make sure to liberally lube it up-we're using white lithium grease because it's good and sticky, but you can also use thick assembly lube-and slowly side it into the bore. It's easier to install the cam before the crank is in place so you can reach down and help guide the cam from the inside of the block. One trick to help you control the cam is to attach the cam-timing gear, which will give you a little more leverage.

Next, it's time to check crankshaft endplay. Lubricate all the main bearings with either lithium grease or assembly lube, and gently set the crank into the saddles. Make sure to only lubricate the i.d. of the thrust bearing, not the thrust faces. Grease on the thrust faces of the thrust bearing will throw off your endplay measurements.

After torquing down the main caps, mount a dial indicator so that it contacts the nose of the crank like you see here, and move the crank back and forth. You may need to pry a big screwdriver between one of the caps and the crank's counterweights, just make sure not to scratch any machined surfaces. You should have between 0.005 and 0.010 inch of crank endplay. If you don't have enough, you may have a main cap misaligned, or you may have to rub the thrust faces on the thrust bearing very lightly on ultrafine wet sandpaper laid on a flat surface. If this doesn't take care of it, or if you have too much clearance, you likely have a poorly ground crankshaft.

Once your crankshaft endplay is documented and correct, you can pull the thrust bearing to completely lubricate it and recheck all the torque specs on your main caps. That may seem like a lot of work to only have the crank installed, but next month, things will really get moving!

KT Engine Development
JR Motorsports
801 SW Ordanance Rd.
IA  50021
Powerhouse Products
3402 Democrat Rd.
TN  38118