Watching this guy describe the Special Service Tool setup for correctly setting up the timing and installing the valve springs on this BMW I8 is pretty cool. He reviews the tools, sets up the engine, then uses the tools. The tool design, construction, and use is straight up tool porn. He starts around 6:42 - 7:50
https://youtu.be/oYtjQ4Zek_c?t=401
Then skip the commercial to where they do the install, as it's a really cool setup. He puts the pin in the flywheel to secure it at TDC (although it turns out it also has the pin hole at 180 off that and has to go back and redo it later) and he uses this sexy as hell spring installation tool at 15:50 - 16:55.
Seriously, I can't even imagine trying to install those springs without that tool and it makes it looks super easy when done with that setup.
https://youtu.be/oYtjQ4Zek_c?t=949
I have learned to buy the tools.
they're not hard to service when you have the right tools.
which is why if this motor ever pops it just gets another, cause there's thousands of dollars in special tools to put one back together.
does anyone need to borrow a $300 suspension bushing tool?
used once.