Good spot. The "pins" (cylindrical pieces at the corners which retain the side seals) should have "springs" behind them, which push them out into firm contact with the end (or centre, intermediate) plates.
On stripping, a few of these pins did not have these springs to apply force "outwards". Omitted during a previous rebuild we would have to assume.
This is likely the cause of the blow by. Presumably also not helped by the scuffs on the end plates, and as it progresses more and more carbon builds up making sealing even less efficient.
Hopefully I will be able to replace these springs (not from Andover, tho, as they are NLA ... ) and allow the rebuilt motor to be better than it was in a previous incarnation.
Fiddly indeed!!
Andy
On stripping, a few of these pins did not have these springs to apply force "outwards". Omitted during a previous rebuild we would have to assume.
This is likely the cause of the blow by. Presumably also not helped by the scuffs on the end plates, and as it progresses more and more carbon builds up making sealing even less efficient.
Hopefully I will be able to replace these springs (not from Andover, tho, as they are NLA ... ) and allow the rebuilt motor to be better than it was in a previous incarnation.
Fiddly indeed!!
Andy
