My engine cases are back from the vapour blasters… another superb job from SP Vapour Blasting who are meticulous and I completely trust to do a good job! When I get them back, the first thing I do is clean them of any media that is left from the cleaning process. They were VERY clear of media, but I like to be sure! I then inspect all the threads. No point in building the engine up to find you have suspect threads, as at this stage its easy to rectify any that are poor. As it happens the only two that needed attention were the ones that hold the stand bracket on. This is a common failure point and I have seen a few cases cracked in this area due to lose bolts. I drilled the hole out and used a M10 x 1.5 helicoil. As these are a couple of really stressed bolts I use a double depth helicoil inserts (see picture for comparison) , just to make a good job of it.
