Bas bjm: we have the same diesel engine in our sailing boat and after 30+ years it
still works directly after turning the key. Even after a winter (with
sixtyfiveford: Sounds like an air cooled diesel to me. Is it still going strong?
Neil Deverell: great!!!!!!!!!!!!
101lumix: sounds the same as mine!
dieselsailor9: That knocking is not normal. It is a mechanical knocking so likely
internal. I believe you will find metal sediment in the oil unless the oil
has been recently changed. This is an old Yanmar model, the repair will
likely be more than the engine is worth. Your will probably need to get the
engine out to break it down and begin determining the cause; at that point
I would suggest repowering with a newer engine rather than rebuilding this
35 year old engine.
MrAndrewee: sounds like the piston is hitting the the top. Maybe you need to inspect
the engine oil and look if there are parts or dus of iron in it. If so,
then ask professional advice, maybe the engine needs to be revised.
sailpunk: This does not sound right, the loud knocking is not normal. I have a YSE8
in good working order and that is not how it is supposed to sound. The last
comment is likely right however make sure it is not something rattling on
the engine. Check the mechanical oil filter for metal.
antofa123: Blown head gasket isn't too bad... at least you won't have to strip the
block down. Good luck with the rebuild!
antofa123: Mine doesn't have that ringing knock....
fillyerboots1: That tapping sound could just mean the tappets need adjusting, but I'd be
interested to know what conclusion you came to, and if you still have this
engine. Mine is a 2 year-old 1GM10 which sounds a bit like this upon first
start up until the oil gets around the system and it warms up a bit, when
it thumps rather than 'taps'..
turbo5er: Does the engine go low as 4:50 for a long time without stopping? Mine does
not go that low.