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Discussion Starter · #1 ·
Hi all,
Hoping for some help/advice. I have recently bought a 2009 Cooper 1.6 with 100k on the clock. After buying the car I noticed the oil level was high so I drained some oil, a day later I decided to do a oil change and also change the oil filter, I used Castrol Edge 5w30.
Since doing the oil change the car has white smoke coming from the exhaust, it doesn't happen on start up from cold but once warmed up.I have checked the oil level and it is fine, the coolant level is fine too. I took it to an independent Mini specialist and they said they would need to replace the rocker cover which should solve the issue as BMW made a modification to the rocker cover, something to do with breathing pipe?? Does this sound right? Don't want to throw £400 at this and for it to not solve the issue?

Any help advice appreciated!
 

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have they done other tests on it try and work out condition of the engine or have they found the rubber valve in rocker cover to be faulty,
 

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no, they took off oil cap and held it over the hole while the engine was on, it was sucking the oil cap back on which he said shouldn't do that and that I needed to replace the rocker cover before any more damage was done to the engine. The engine doesn't smoke on idle on under load if that makes any difference?
 

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That's a sensible way to test an engine with with a PCV valve. Your inlet plenum vacuum is at its highest when the engine is idling. Vacuum reduces with engine RPM. The valve should close off under high vacuum. If that isn't happening then the PCV valve is at fault.
 

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Discussion Starter · #5 ·
so, I had the rocker cover replaced and guess what?.... nothing has changed, he has now said the engine will smoke as its burning oil, and that it is fine to drive, he also recommended using a thicker oil next time a 10w 40 which should reduce the smoke somewhat, but the smoke will not go.
 

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Most likely you bought a lemon. Some one put stop smoke, it is around 400ml in a can into the engine to stop valve steam seals to let oil and essentially smoke. If it is the case you need new valve seals and while you their change chain. If car was smoking for long time it before you bought it it could have had damage to the cat?
 

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Valve stem seals are just one of the routes that excessive oil can make its way into the combustion chamber. It is just as likely to be issues with the oil control rings or bore surface finish. People (particularly in the UK) seem to have a bit of an obsession with stem seals though.
 

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Hi all,
Hoping for some help/advice. I have recently bought a 2009 Cooper 1.6 with 100k on the clock. After buying the car I noticed the oil level was high so I drained some oil, a day later I decided to do a oil change and also change the oil filter, I used Castrol Edge 5w30.
Since doing the oil change the car has white smoke coming from the exhaust, it doesn't happen on start up from cold but once warmed up.I have checked the oil level and it is fine, the coolant level is fine too. I took it to an independent Mini specialist and they said they would need to replace the rocker cover which should solve the issue as BMW made a modification to the rocker cover, something to do with breathing pipe?? Does this sound right? Don't want to throw £400 at this and for it to not solve the issue?

Any help advice appreciated!
How did you solve the problem? I am having the same problem now
 

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How did you solve the problem? I am having the same problem now
Hi, I've the same issue. Cooper S 5year old 77600km, 2 litre petrol. Changed oil & white smoke on start up only lasting about 10 to 15 seconds, mostly morning time & nothing throughout the day, this is going on a couple of months now & have had it with 4 different mechanics who could find nothing. About 4 weeks ago the smoke has stopped & no smoke on start. Not losing coolant or oil & car in top form when driving. Had to wait 6 weeks for appointment with Mini garage, so decided to keep the appointment out of interest to see would they find something. Two days later they can't find any fault so they posted on a forum today & said based on the responses they received recommend replacing the gasket cover at a cost of over 1k. They showed me the note they had posted, but it didn't sound like the issue I was having, it said car blowing blue smoke & trace of oil in turbo, so I mentioned the smoke was white & asked had they found oil in the turbo to which they replied no, so I find it bizarre they can make a recommendation to carry out work with no guarantee it will fix the issue. At the moment, no smoke & car driving fine. Any advice would be appreciated.
 

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Hi, I've the same issue. Cooper S 5year old 77600km, 2 litre petrol. Changed oil & white smoke on start up only lasting about 10 to 15 seconds, mostly morning time & nothing throughout the day, this is going on a couple of months now & have had it with 4 different mechanics who could find nothing. About 4 weeks ago the smoke has stopped & no smoke on start. Not losing coolant or oil & car in top form when driving. Had to wait 6 weeks for appointment with Mini garage, so decided to keep the appointment out of interest to see would they find something. Two days later they can't find any fault so they posted on a forum today & said based on the responses they received recommend replacing the gasket cover at a cost of over 1k. They showed me the note they had posted, but it didn't sound like the issue I was having, it said car blowing blue smoke & trace of oil in turbo, so I mentioned the smoke was white & asked had they found oil in the turbo to which they replied no, so I find it bizarre they can make a recommendation to carry out work with no guarantee it will fix the issue. At the moment, no smoke & car driving fine. Any advice would be appreciated.
bmw own engine then ho the bills for parts will be bonkers , shame its not a 1.6 n18 engine you would be in a better place if things need replacing, rocker cover for n18 engines are £250 aftermarket and £500 dealer,
i would if were you make sure they put correct oil in it, i've not had much to do with the new gen bmw engines in minis a bit is bmw 1 and 3 series cars but they are to new for after market parts and also close to warranty from a new design so whole world of hurt when it comes to parts, maybe time to get car gone drop it on a dealer and avoid the pain would be my best advice,
 

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Hi, I've the same issue. Cooper S 5year old 77600km, 2 litre petrol. Changed oil & white smoke on start up only lasting about 10 to 15 seconds, mostly morning time & nothing throughout the day, this is going on a couple of months now & have had it with 4 different mechanics who could find nothing. About 4 weeks ago the smoke has stopped & no smoke on start. Not losing coolant or oil & car in top form when driving. Had to wait 6 weeks for appointment with Mini garage, so decided to keep the appointment out of interest to see would they find something. Two days later they can't find any fault so they posted on a forum today & said based on the responses they received recommend replacing the gasket cover at a cost of over 1k. They showed me the note they had posted, but it didn't sound like the issue I was having, it said car blowing blue smoke & trace of oil in turbo, so I mentioned the smoke was white & asked had they found oil in the turbo to which they replied no, so I find it bizarre they can make a recommendation to carry out work with no guarantee it will fix the issue. At the moment, no smoke & car driving fine. Any advice would be appreciated.
Neither my 2018 JCW or my 2023 S smoke upon start up. But a couple of my other cars would emit a bit of oil smoke at cold start. I first noticed this when I was in the process of buying a new car and upon engine start prior to the test drive the engine smoked a bit. Techs I talked to told me they see this often with used cars on the lot and even new cars. They went on to say as long as the smoking was brief and was not accompanied by a CEL or untoward engine behavior they paid it no mind.

I'll add to if the engine doesn't smoke at hot start or at other times.

As is my habit with my cars is I seek to avoid short trips. And run the right oil and change it on a bit of shorter schedule than the factory calls for.

As oil gathers miles it becomes contaminated. One side effect of this is it is more prone to vaporization. The engine air/oil separator (AOS) is intended to remove the oil vapor but these are not 100% effective. As a result some vapor flows through the separator and when it reaches the intake manifold the oil vapor being heavier can't make the sharp turn. Rather the vapor hits the opposite wall of the intake and there regains its liquid form.

If the engine is allowed to run long enough this bit of oil will be pulled into the engine and burned. Because the amount of oil is small and the engine/converter is hot there is no smoke.

But if the engine is shut off this oil can drain down and collect on top of a closed intake valve or flow through an open intake valve and enter the cylinder.

Upon the next engine start smoking is observed.

In spite of my avoidance of short trips and changing the oil at 5K miles vs 6K or 10K or even 15K (as called for by the factory) as the miles on the oil approached 5K I'd see -- just a time or two -- smoking upon engine start. This was a sign the oil was at its replace by miles.

Of course there can be other explanations. Engine overfilled with oil. A bad PCV or a bad AOS. (With one car over 317K miles I had to replace its AOS 3 times. It was a wear item.) Less common is bad rings, bad valve stem seals, or bad turbo seals. But with bad rings, bad valve stem seals, or bad turbo seals smoking would almost certainly show up at other times.

That your car's engine stopped smoking suggests the problem is one of usage. Short trips perhaps. Or you overfilled the engine with oil. Not sure if the wrong oil could account for the smoking but it is important to use the right oil and of course fill up the engine but don't overfill it.
 
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