OLDS BLOCK REPAIR
Sometimes the front of Oldsmobile blocks get worn and chewed up by the camshaft flange. This is often caused by additional load from a high pressure or high volume oil pump which makes the distributor work harder and pulls the cam back towards the block. I machine the backside of the cam flange down to the same diameter as the bearing journal and as deep as the width of my torrington bearing, approximately .125”. When fitted to the cam it is larger in diameter than the cam flange and picks up the original material height of a worn block. The small lip on the torrington bearing fits neatly into the I.D. of the cam bore and does not interfere with the cam bearing. The bearing is from a GM 4L60E transmission, GM part #8642215.

Randy Quam
Competition Engines
Eagan, MN
January, 2016