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Looks like Brown, Brown, Brown, Green to me. You can still see the colour on the side of the shell. Looking at them I suspect something wrong with the oil, loads of really small score marks like the oil had little bits in suspension. Probably not changed for ages. Still useable though.
Sizes are just about within spec but markings on shells wory me.I suspect fitting new of same colour would give tighter tolerance
Those are done using plastigauge Murdock.I'm not a fan of plastigauging old shells, sure you get an indication of the clearance but it doesn't tell you what's worn, just that something is. However if you fit a new set of shells and the plastigauge them, the results will show you just how worn the crank is, if it is at all. So for instance, you fit new shells and the clearance is still over spec, you then know that fitting the next size shell up is the potential answer. One good reason for keeping a new set of yellow shells around, you fit them, get the clearance they give and then calculate the colour required to get the clearance back into spec.
alex , what you need is a plastigauge test to see if they are all within tolerance.
You only need 1 set Alex, you just do 1 at a time.
Yellow are hard to find. Green would be ok to use, especially as you'd need a set of green shells anyway if you were fitting new ones. So check them all with the new greens then see what clearances that gives you for each one and work out the correct shell colour for each one. Using blacks is ok Ted BUT I'd normally only recommend it when all the crank markings are not visible and you can't work out the correct shell. Last time I counted them I had 58 or 59 black main shells and 30 or so conrod ones. Plus a load of yellows and some greens and some browns.