18-04-2019, 08:21 AM
Obviously past history of the case studs could be a factor, however it is my belief the the quality of SOME replacement studs is not good enough. In the past when being lazy I have used off the shelf studs and on occasion experienced rapid failure, I now never use studs where I am not 100% sure of the grade of the steel I have made them from and have not experienced further problems. I have also used a number of silicon gaskets and suffered no problems as a result, even with reasonably high CR and high lift cams. I assume you checked the top of the case was flat, they are often not, and you rectified as required, I also assume the case was not unduly loaded by the chassis?
Black Art Enthusiast