Can't answer your question, but generally the Busso is such a great motor that spare parts like these are not needed as they rarely give grief. Now that does not help you, but buying another engine might be your best bet. Unless someone else has a source of the parts you need or can answer your other questions.

 

In Holland you could try Tuynder: Tuynder B.V. (best use the VIN!! ) or "Arese": www.arese.nl or try OKP : www.okp.de
Please keep in mind that pistons need compatible liners because they are organised in "classes". The class of liner is painted on the side of each liner, and stamped in the top of the piston.

 

Hi, all 3.0 and 3.2 cylinder liners are the same. I currently have 3.2 cylinder in my 164 engine

 

EB Spares have a liner and piston set for £720 +vat EB Spares .co.uk

 

As above and EB Spares are a thoroughly reputable company and that would be my choice. If you decide to try another supplier ensure the set is original and complete, not made up from 5 plus 1 other because one was used for another engine and then replaced with an odd one. I have seen that and it wasn’t a satisfactory answer. They have to match completely.

 

Just get another engine. Liners on V6 never go bad and are very expensive to buy new if you can even find any. A new engine is your best bet.

 

Also what I would recommend, since you have the engine apart, get it balanced and lighten the flywheel. Have in mind these are externally balanced crankshafts, you need the flywheel, crankshaft and the crankshaft balancer balanced at the same time. Best of luck with the build!