I had the exact same problem. The metric bolt was barely hanging on with about two threads. That's why it leaked. I found a company that made that banjo bolt 1/4 inch longer. Problem solved. CPP told me then, there were two types out there, metric and 7/16. I got stuck with metric. Those little problems are maddening! But not their fault.. GM really did have the profound gall to use a metric bolt!
