Haven't had a lot of time to post photos lately but here are a few, this should be a big week for re-assembling the engine and car. My last post on this thread was dropping-off the engine at the machine shop where everything was measured/checked and crank was polished, etc...
All measurements were fine on the case, (very important), crank had been turned one repair size on rod journals and 2 repair sizes on mains. Case was still standard, (never align-bored), and fortunately not in need of same. Each repair size on crank= .25 mm.
To give you an idea of how precisely this was done in the past, the main journals measure 49.5046 mm. (Original size is 50 mm). They were not worn and the crank was simply polished for minor signs of wear/use. The case is the original numbers-matching piece and is in great shape.
The transaxle was removed while the engine is out and sent off to TRE Motorsports for an overhaul and re-seal, fortunately it only needed bearings refreshed and a general *once-over*. They do first-class work. I'll get some pics when I go to pick it up today or tomorrow. I also had a lot of parts powdercoated black by a great PC guy across from TRE, engine tin and swing arms, etc...
First order of business is cleaning the case properly. The general wash that it got at the machine shop is only a starting point, you need to still clean and check all passages and mating surfaces, etc... (I know...I say "etc..." too much).
For case cleaning, I use my WW2 surplus gun-cleaning kit that I actually bought at the Porsche Literature and Memorabilia show and swap meet several years ago from one of the big 356 parts sellers. Never knew what I'd use it for, how's that for a coinky-dink?
I almost forgot...when I got it back from machine shop, one of the oil pressure-relief bypass pistons was completely stuck in the timing case, which is the front cover (rear-facing when in car), part of the 3-piece case. God only knows how long it had been like that but it needed to be drilled and pulled-out w/ a tiny slide hammer by my machinist. The last guy who "re-built" this mill really did not know his ass from page 9 and I discovered that he had the two springs reversed in the 2 relief bores. (One in main case and one in timing case). Easily rectified now but just one of many small eff-ups that will be corrected in this new overhaul.
Old piston after removal:
The two springs, (they are almost identical but not):
