several questions

I have a late production 1994 512TR. The AC compressor was making a ticking noise when cold, and, upon inspection, the main pivot bolt for the compressor (bottom) had come loose. I re-tightened it, but I fear the threads are stripped in the block. It is holding well right now, and I'll keep a close eye on it, but is there a fix that can be accomplished with the engine in the car? It is mucho difficult to work in that area. Is there a temporary fix (threadlocker?) until the next service? The car currently has 48000 miles (I did the 30K service in 2003, and I plan on another 12K before replacing the belts, and yeah, I know the recommended belt service intervals).

Question 2:
In the course of replacing the AC belt and fooling with the bolts, both crank sensor connections crumbled (almost 20 years old). I'm thinking of just replacing them both with 3-wire weather-tight connections now, and maybe getting new stock-type connections when the engine next comes out. Whaddya think? I'm not too concerned with stock appearance. Any suggestions on where to obtain modern wire connectors? The crank sensors seem to be placed in the most inaccessible positions. Any advice on how to take them out (remove this or that first, etc)? I may ultimately have to call upon the power of Shamile (he of the sinewy forearms) to reach those bad boys.

Thanks.

 

I've used helicoil in the past with good results in other applications. The problem with this bolt is that the bolt head abuts on a radiator hose before it comes all the way out of the AC bracket. This is good, because I did not lose the bolt when it came loose, but bad because you have to fully compress the hose with a big screwdriver or other long tool in order to get the bolt out (very difficult without a second pair of hands).
If the bolt comes loose again, I will try threadlocker (it seems fairly snug, but will not tighten all the way in). Next engine out, it gets fixed right.

 

Do the crank sensors come with the short harness attached?