Inverted bucket cam followers?
Saab had those on their first inline 4 (same engine would later end up
in the TR7).
Except they were kind enough to put a bracket on the block that lined up
with the cam and put a threaded hole in the center of the sprocket.
You took one cam sprocket bolt out, used it to bolt the sprocket to the
bracket, then took the other two bolts out, unbolted the cam bearings
and lifted the cam off the buckets. Then lift out buckets and swap out
shims to adjust.
Put it all together and measure clearances again.
On 2021-12-14 11:42, dan penoff.com via Mercedes wrote:
I don’t recall ever doing valve adjustments on a V12. I did them on
the inline 6s, though. Very time consuming if you had to make
adjustments. You have to pull the timing chain, cam sprockets and
cams.
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