short block finished - next step: long block assembly!

After I lubed all bearings, coated the cam lobes and lifters with Molykote 3402-C and cleaned the sealing areas really religious, I finally assembled the halfs and torqued all bolts to the correct values. I used sealant under all washers and nuts - in hope for a clean, leak free engine.

Then I started the piston + cylinder assembly.


Every component got a bath in my ultra sonic cleaner to make sure they are really clean:

the pistons are lubed, the wrist pin clips are positioned with the sharp edge to the outside, I de-burred the edges from the stamping process prior assembly:

the cylinders required a little persuation for a good fit - of course only with a "soft" hammer!

as the seats for the cylinders were machined for a nice overall sealing surface, I have almost "0" back lash, the piston ends exactly where the cylinders ends - not good for a healthy compression ratio!

In order to calculate the compression ratio I cc'ed the heads. Starting with 60ml of motor oil in clean, new mega-syringe:

(the pic shows it filled to 61 cc - but I adjusted it to exactly 60cc before I started)
the combustion chamber, topped of with oil - spark plug hole sealed flush: 


... and the rest in the syringe: exactly 10ml

So, according to the helpful website of CSP, which provides an easy way to calculate the CR ->  look here  <- we need these values:
bore: 90.5 mm
stroke: 69 mm
head volume: 50 ccm
back lash: 0 mm
result: CR: 9,88  which is a little too high - so I will double check all values and maybe use 0,5mm shims to reduce the CR to 9,34:1 which is almost exactly my target (9.5:1)!