Evening all,
BMC 2.2 diesel engine has intermittent puffs of blue smoke, not talking about cold but when really nice and warm, running for a couple of hours. It feels a little strange to me as it's not constant & it seems to happen more at lower revs, less than 1800 ish.
I'm assuming it oil burning (blue smoke), compression is good and pretty even between the cylinders, it starts well, even from cold, 10 secs of heat & turn turn fire and runs smooth immediately, so I'm assuming the rings are ok. I've checked the breather it's clear. My only other thought is valve stem oil seals, I'm sure if read somewhere only required on inlet valves.
Anyway, what do you guys think, is it more likely to be oil burning, whats the most likely suspect?