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Rest of system happy running on whatever. Pump is super happy with its life!
Never thought of using an old piston, don't have any floating about either. Was i think £120+ vat (become a work tool now) which is obviously at the cheap end of a tool like that but im only ever gonna use it a few times.
Worked briefly in a metallurgy lab, they had some epic tools, made use of their mad money cmm a few times for checking stuff, the whole room it lived in was specially made from the founds up to have this specific machine put in it. What amazed me was how easy and quick you could get data out of it, the future!
BrickMan
Thought I had replied.
Didn't know about the ring gumming problem, thought if there would be issues were with the pumps. The VW engines were supposed to be fine on I used SVO as I was lazy and could get 20l for £15 so ran the 2.2 laguna (called chippy as it smelt like a chipshop) on that but used to go through halfords glowplugs in about 6 months a set. But then they were being replaced for free.
Bore gauge, that is posh isn't and old piston ring and feeler gauge enough for you ;) Had access to a scanner that I found fascinating as the accuracy was interesting as you could 'see' different manufactures tolerances. Lancia v4 tolerances were better than the ford/lotus pre crossflow blocks compered to the ford pre crossflow and crossflow block from around the late 60s, then manufacturing gets better at ford for the crossflow blocks used in formula ford.