From: Barry Lovelock
Date: 18/10/00
Time: 0:44:03
Remote Name: 194.168.56.147
I don't know the actual hardness of these bolts, maybe too much. I always use 1/4" HT "R" grade bolts in Seven engines without problems and I use 6000rpm+! Maybe the "S" grade ones, sometimes available, are too hard. I always use a thick split washer and Loctite Studlock too. I would suggest tightening one of the Allen-headed ones until it breaks and then comparing this with a normal hex one; maybe the former are too brittle.