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Occasional ball of Blue smoke on high revolutions
17th of February 2017 ... Number of Responses 1 --
Hi there. Hope you guys can help with an answer although its not leak related. I hardly ever drive my car hard, but every now and then i go through the gears changing at / - 6000rpm. This happens about once a month so i dont drive the car lazy, but the last time i did this a big ball of blue smoke came out my exhaust (engine was warm already) fir like 20 seconds and then stopped. I stopped, accelerated hard again and no smoke came out, even if i leave the car to idle for 30 mins and give at a few small revs up to 3500 rpm, no smoke. What could have happened? Its a 1.6 2011 Ford Ikon petrol Duratec engine, any advice for me please? Tiaan
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Response Posted:17th of February 2017
If it was a constant oil burn at high rpm most would say it was probably was valve seals. The engine would be sucking in oil passed the valve seals due to the high vacuum generated by the rpm. Since this is not the case it is hard to diagnose. Some thoughts - the PCV valve which is part of the oil separator on these cars may have been clogged and this one drive opened it up and released a lot of oil from the crankcase which was previously blocked. Others have mentioned that high RPM can cause oil to escape from their engine oil dipstick and this ends up on the exhaust system causing smoke - this might be seen by oil being present on the outside of the engine and an easy to turn dipstick. This could also be caused by a worn oil filler cap. Check the plugs to see if any are coated in oil as this may suggest worn oil rings on the piston for the cylinder affected. Also do a leak down / compression test on the engine just to make sure no engine damage is present that may be causing oil to burn.
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Response Posted:18th of February 2017
Thank you for your response and advice, it makes sense. Any other remarks still welcome.
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