19-11-2019, 07:49 PM
Looks like corrosion from long standing. Hopefully not rust coming through.
I have heard many stories of long stored engines with corroded bores running quite satisfactorily.
Although it may complicate oil consumption engines can run with surprising little power loss despite considerable wear.
Until recent times .007 taper was considered acceptable for large engines and many ran with .010 or so. Now books recommend rebore at a mere .003 taper!
I have heard many stories of long stored engines with corroded bores running quite satisfactorily.
Although it may complicate oil consumption engines can run with surprising little power loss despite considerable wear.
Until recent times .007 taper was considered acceptable for large engines and many ran with .010 or so. Now books recommend rebore at a mere .003 taper!