As you might know, I've done a few miles now on a totally rebuilt engine. New pistons, rebore, new rings, new valve stem seals.
I've had a bit of sooty oil on the tailgate. I used to get loads of this and I assumed it was oil leaking past the rings. The rate of loss was quite low. Well, yesterday, I was told by someone who followed me that I had a few puffs of smoke when giving the engine some stick. They reckoned it was breather blow by. Mainly because it wasn't constant smoke, just a few blows and then no more for a good while.
When I looked in the inlet a few weeks ago there was a bit of oil in there. Bearing in mind that I tend to slightly over fill the engine then I wasn't too worried.
I've hear a few stories about engines that chuck out a fair bit of oil at high revs. Does this sound likely?
So, I believe/hope that the smoke is due to oil being blow up the breather pipe at high revs.
I'm not too scared about oil use, the rate of loss is pretty low. I might pluck up the courage for a compression test, since the other explanation could be a broken ring. Though I expect that that would be unlikely. Or bore glazing, but I hope that's not the case.
Is it worth making a catch tank?