Now to start pulling off the exhaust. Found some interesting things.

The joint between the heat exchanger and the crossing exhaust pipe on the 4-5-6 side was full of oil. Probably half a cup came out when I opened that part up. Note that my destroyed valve was 3.

Taking off the heat exchangers wasn't as tricky as I feared. The inner bolts on the exchangers were actually just stacked with washers, maybe as a stand-off? Not sure how that worked. But that meant I just had the 8mm studs and then 3 nuts per side.

4-5-6 side was pretty oily, especially at 6.

http://forums.pelicanparts.com/uploa...1751636537.jpg

1-2-3 was not as oily. Here's a video of her as she stands now. (May take a minute to be available).

https://youtu.be/6zh79LVmjPE

Video of the from the top. Three is the boomed cylinder.

<iframe width="560" height="315" src="https://www.youtube.com/embed/D9G9zfOnCsM" frameborder="0" allowfullscreen></iframe>

Video from the bottom.

<iframe width="560" height="315" src="https://www.youtube.com/embed/HEfylfChkLI" frameborder="0" allowfullscreen></iframe>

Obviously I want to know why this happened.
Is there anything I should note, record, or measure as I take things apart to help me identify the cause? I'm trying to take a lot of photos and some good videos, but I don't know what to look for besides "the broken parts" and "lots of oil/dirt" where it shouldn't be.

Take pictures as you disassemble it. The valve guide is gone, so I would want to know where that went.

:)

Good work, Opening the chain box covers should be enlightening. I noticed in the video the sump cover is on, did you take it off to drain the oil and then put it back on ?

I did not take it off yet. Should I do that now?

Cam housing covers are now off. I need to identify the correct Porsche Tool(s) to remove my camshafts. I took some careful pictures, so that should help me identify the right ones.

Then while I'm waiting for the special tool, I can clean things up.

http://forums.pelicanparts.com/uploa...1751724891.jpg
http://forums.pelicanparts.com/uploa...1751724891.jpg
http://forums.pelicanparts.com/uploa...1751724891.jpg

Start by Tearing it down to the case, pull all the oil plugs and piston squirters. This thread should be over in the engine forum.

Aha, engine forum! I didn't even think of the fact that there's a rebuild-focused subforum. Here's a new thread - I'll make future updates over there.

Engine Rebuild Subforum Thread

hi Rod
i know this is off topic, but how loud is that exhaust setup your're running?

Hi Mike. Pretty loud WOT. Burbles a bit at idle. I can drive it under the noise radar, but when I’m on it you notice me. Lots of compliments at the track on how nice it sounds especially when bouncing off a wall.

Big surprise in the engine teardown thread - the camshaft bolt was loose! Going to see where this leads...

https://forums.pelicanparts.com/911-engine-rebuilding-forum/1179839-1979-sc-chewed-valve-total-rebuild-2.html#post12493691

I think I may have located the instigating failure. The rocker shaft on the valve rocker that failed was far far out of alignment.
https://forums.pelicanparts.com/911-engine-rebuilding-forum/1179839-1979-sc-chewed-valve-total-rebuild-3.html#post12494493

Thanks for that.
I must be getting old... looking for something quieter these days :)