In both of my 968s, there have been quite a few situations where bolts, nuts, sensors, ( anything with a thread practically ) would not budge, and some of which even broke because of metal fatigue. In fairness , the tip may have had some rust on those parts, but you'd think the six speed which has never seen even a drop of rain would not have those issues . And my former mechanic always used anti-seize, but some things were set in place, undisturbed for 20 + years so it's likely time has taken its toll on them. Both my previous mechanic, and my current one have every specialized tool imaginable to work on these cars and even with those some jobs took exponentially longer and an extraordinary effort needed vs. what " the book says " or what theory would suggest is needed. Quite a few times the threads stripped and the thing had to be re-drilled / tapped .
The most recent examples : the oxygen sensor replacement which took hours, upon hours, upon hours of brief back and forth unscrewing attempts, followed by a variety of loosening agents sprayed to help the cause, wait, repeat , wait, repeat , so on and so forth and only half a day later, it finally gave in. Voltage regulator : an otherwise 10 minute job, took my mechanic almost two hours . And I was there in person for both of those jobs the entire time so it's not as if I was " ripped off " by fake labor charges ..
