ATTENTION! all you successful mechanics out there! (you guys,(or gals) that actually make your living repairing anything that requires a real mechanical aptitude, and, NOT a 'parts replacer'}. there is a real opportunity for you to make a fine living in many countries, such as russia, as a doctor. thats right, a medical doctor. most people here in the u.s.a. don't realize that in many countries, there is a very fine line between a mechanic and a doctor. after all, the human body is nothing more than a machine., and most of the work performed by the u.s.a.'s doctors is glorified. (try reading their writing, this must be some sort of code!)i therefore submit that if you can(as a mechanic) replace a piston in an engine, or a valve in a head, then, you should be able to replace a heart, or, perhaps perform brain surgury as well!! remember however, that all the engines will be running as you do this!