Yup it was nice to recieve rather than loose stuff Eric.
Big Rat, Thats a nice time for Denver. Do you have trouble tuning for the altitude?
I worked at the machine shop for a few hours tonight cleaning customers heads after they came out of the washing machine. After I was done with the regular work I gave my '73 993 castings a quick once over with a wire wheel so we could magnaflux them when we did the customers heads.
A couple of the customer heads I was cleaning up were lightweight castings which tend to crack between the middle chambers. Two of the heads had already been repaired in the past by another shop and will be repaired again. The customers heads had easily visable cracks so it made it nice for me to take pics showing how magnafluxing works.
First pic: My workspace. OK new guy, here's a bunch of heads, a drill, and a bunch of wire wheels, scrapers and other various implements to clean heads. Make um pretty! In the pic are my heads, no they haven't been cleaned yet. Just wire wheeled enough for magnafluxing in the chamber areas.
Second pic: Bad news for me. One of my heads has a small crack by an exhaust valve. The pic's out of focus but you can see the line. We'll have to make a decision to pin the crack and install a new valve seat or seek another head or pair of heads. Good thing we checked them before washing and thoroughly cleaning them.
Third pic: For those who never witnessed Magnafluxing this is how its done. Electromagnet is located so the area you want to test is located between the posts. Then some "magic dust" (in my best Cheech impersonation) is puffed ofer the area to be checked and the dust jumps right to the crack. Even if the crack is very small (like the one on my head) it will show right up. The crack in this pic was easily seen by the naked eye but it made for a nice easy pic to display the process. The lightweight head in the pic had been sleeved for the bolt hole previously so thats why theres a circle of magic dust around it. The dust knows it as a crack. This head will be pinned to repair the crack. If the opportunity arizes to get pics of "pinning" sometime I'll get some.
