#110971, "RE: Infamous 420a HG leak problem. Question on headbolt: Remove 3 threads??" In response to In response to 3
If you call the dealer and ask regarding stretch bolts.....they will tell you on our motor that you dont need to replace unless the bolts are stretched, if htey are not then you can reuse them....moving on......
Cut 1-2 threads off the corner bolts only and you will be good.