Yesterday, I had re-sized some bolts and I was test fitting them in the aluminum head. I screwed one in about 1/2" with my fingers ONLY and it began to get tight so I stopped and began to back it out.

All was well for a few turns when it suddenly began to get tight and quickly ground to a halt. At this point, no amount of screwing in or out moved the bolt and I nearly broke the tool trying to get it back out.

So, I finally ended up breaking to bolt off and now I'm stuck either using a Dremel tool to eat away the aluminum or take it to a shop and have it EDM'd since it was a class 10.8 bolt...

Moral of the story: Always put a drop of oil of fastners that are screwed into aluminum!

__________________
-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250