05-10-2020, 10:10 PM
The contents of no. 4 are some of the thick goo that was in the sump, illustrated above. I took the snap of the top of the block immediately after taking the head off. It was solid then, by the next day it had freed up. This can be seen as an illustration of the unpredictable. A very externally dirty engine of dubious origins, seized, turns out to have been what seems to have been well overhauled at some time and subsequently little used. No chewed up fastenings and not a single metric fastening bodged in. I think initial reservations should be put aside and crankcase M9900 should remain wedded to the screw core plug block, the head that came off was correct with the plugs. The next big question is how big ends and bearings will have survived what could have been decades marinaded in thick brown soup. Wil they be useable, or pitted? Further forum advise may well be requested in due course!