(02-07-2018, 09:00 PM)Adrian Payne Wrote: Within the last year I have rebuilt my engine, re-bore, new split skirt pistons etc but it continues to smoke and use quite a lot of oil even after 2000 miles. The engine was not idled after the re-build.
The rings were gapped 6 thou and evenly spaced. The rings have no shape to them or markings so I assume have no up direction.
I am still using the oil baffles. The compression is really good compared with other low compression engines that do not smoke.
Is it possible for this amount of smoke to be due to worn valve guides and is there a method to prove definitively that it is the bores or the valve guides at fault.
Your valued input would be appreciated before I strip it all apart again.
Many thanks.
Adrian.
I am surprised no one has yet questioned how the engine has been run in. If a top quality oil was used, with all the additives that they contain, it may be that the rings have not had a chance to bed in properly,nor will they easily if the bores have glazed. Far better to use a cheap, straight 30 oil, and change it frequently until the rings have bedded in, and then swap to a decent multi-grade or specialist classic oil.