Rebuild in progress, take a look at these intake valves.
 

Owner of a 1984 3.2 here. Bought a few years back and was told "engine rebuilt 10k miles ago". Odo say approx 150k miles. Engine was running just fine so i took a chance.

However, after my local garage found a half head stud after a valve adjustment, i realized that i probably should have had more documentation on the "rebuild".

Anyways. Winter and time for projects, so i have bought the book, dropped the engine, and started teardown.

After removing the intake today, i was exited to finally get down to some top end details :)

Looking forward getting deeper into it, but wiithout any previous experience with these engines, would you say these intake valves look like they had 150k miles to then? or could it be that someone actually touched this engine recently. Looks pretty good to me.

http://forums.pelicanparts.com/uploa...1761590383.jpg
http://forums.pelicanparts.com/uploa...1761590383.jpg
http://forums.pelicanparts.com/uploa...1761590383.jpg
http://forums.pelicanparts.com/uploa...1761590383.jpg
http://forums.pelicanparts.com/uploa...1761590383.jpg
http://forums.pelicanparts.com/uploa...1761590383.jpg

I'd say that the seller was honest as these intake valves look very low-time to me. The rebuilder probably didn't replace the original head studs, explaining the failure.

Hi
Looks clean to me to.
Some ideas to reduce your work scope, see link below
Cheers
https://forums.pelicanparts.com/porsche-911-technical-forum/1160618-extracting-broken-head-studs-engine-still-car.html

Judging from the lack of oil contamination/buildup, the seals and possibly guides were probably also replaced.