Engine Rebuild: May 2010

After a thorough search for decent used engine, we decided to rebuild the engine instead. At least we would know the condition of the internals even though the rebuild would take lots of time. We decided this in early May, and we were scheduled to race on June 19th. That didn't leave us a lot of free nights and weekends. Off to work we went.

With the engine out and on the stand, we disassembled it and found some really ugly rod bearings. In the photo below, note the distortion of two of the bearing shells.

We had the crankshaft ground .0020" on the rod bearings and .0010" on the mains. We honed the block and went back with fresh rings and bearings on the bottom end.

The cam bearings surfaces were a little rough from the rod bearing fragments that must have been force up through the head. We couldn't find a good head in short order, so we went with what we had.

We reassembled the engine, bolted on a new clutch, and had it running with a week to spare.