28-04-2021, 11:56 PM
(This post was last modified: 28-04-2021, 11:59 PM by Bob Culver.)
If the caps have not been relieved full width at the parting line probably only the original combination will likely fit without a step. Also the side faces will likley only be flush on the matched pair.Even the crankpins may not all be the same size. And as above wear patterns and score lines will often identify pairs. Scraping was covered at length recently. Alamost anything tight can be fitted but not really for the raw amateur. Caps have often been crudely filed. Shims are not a sin and many cars had as standard. if the crankpins are perfectly round the falling by own weight notion is really too tight. If going to fully tighten bolts a myriad times best to use an old dedicated pair. Relatively inexpensive direct reading vernier callipers are readable to about .001 either way and can be used as external/internal comparators, although white metal easily damaged.