Hi Roger, Could I add that another cause, slightly less frightening but also requiring an engine strip down, is rings where the gaps have moved into alignment?
If the level of blowback, and subsequent crankcase pressurisation, is not too high then I would certainly consider this as an option; another possibility might be that the rings fitted were not of the correct type/size - or were fitted upside down, if they are shaped. I wondered whether Terry had any warranty if the recent re-build was done commercially. Trevor Roger Millin wrote: > The most usual cause for oil mist being driven out of any orifice on an > engine is an over-pressurised crankcase and the most usual cause for that is > worn/broken piston rings. With the pressures involved in diesel combustion > you don't need a massive leak to cause significant ring blow-by. So, assuming > that there isn't a blocked breather elsewhere (and I'm no expert on > agricultural engines ;-))) then my first concern would be for the rings, I'm > afraid. And yes, I do remember that you had the engine rebuilt not that long > ago but a broken ring could happen suddenly which might explain the rapid > onset of the problem. > Roger [Non-text portions of this message have been removed]
