Poor oil consumption.... advice please?
Discussion
If you have worn bores and were losing oil there, then your request of a compression test should have shown a reduced compression? May be worth doing this test just to rule out that the test you requested would not have influenced your decision to go ahead with the work...
As Spend has suggested, check that the oil trap in the breather system is working. If it isnt, oil will be sucked up through and into the induction side of the engine. Then burnt. With that much oil being lost is the exhaust smelly? or even bluish?
As Spend has suggested, check that the oil trap in the breather system is working. If it isnt, oil will be sucked up through and into the induction side of the engine. Then burnt. With that much oil being lost is the exhaust smelly? or even bluish?
I'll do those checks, but visibly the exhaust just looks black inside, not blue at all.
It was running rich and black before, but is now running better and smoother with normal CO2 readings. However still spits out black wet deposits on start up as it did before. While it was in for work it also had a 12k service and I know the breather filter has been replaced.
The oil I'm using is 10w 40 semi-syn, as you say mineral would just disappear at the same rate.
Already spent £7k restoring it, saved it from the scrappie as it was principally ok, just well used and very tired with worn parts.... had hoped the engine was ok.... but will run those checks.
It was running rich and black before, but is now running better and smoother with normal CO2 readings. However still spits out black wet deposits on start up as it did before. While it was in for work it also had a 12k service and I know the breather filter has been replaced.
The oil I'm using is 10w 40 semi-syn, as you say mineral would just disappear at the same rate.
Already spent £7k restoring it, saved it from the scrappie as it was principally ok, just well used and very tired with worn parts.... had hoped the engine was ok.... but will run those checks.
maybe an oil seal weeping under pressure which may not show when you are stationary. My 450 was leaving no oil spots on the drive but was still getting through a litre every 1000. At last service they found a weak oil seal underneath somewhere (yes I know thats not much help but I'm not technical ok !) which was fixed when they had everything in bits to fit the new clutch.
Black spray from the exhaust in start up is normal (well Mine always does it anyway) . If shes been left for more than a week and its been particularly damp I can get two gushers of black water out the back , probably a few litres as the damp air seems to condense inside the exhaust. Probably due to living at the bottom of a hill where the cold damp air gets trapped.
Black spray from the exhaust in start up is normal (well Mine always does it anyway) . If shes been left for more than a week and its been particularly damp I can get two gushers of black water out the back , probably a few litres as the damp air seems to condense inside the exhaust. Probably due to living at the bottom of a hill where the cold damp air gets trapped.
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