Smoking is ? bad for you

[HQU]

Has anyone else experienced intermittent heavy smoking from their SDV6? I have a MY12 and about once a week, almost always under heavy acceleration, the exhausts will belch a copious amount of white smoke (I'm pretty sure it's smoke rather than anything else) producing a pretty good smoke screen if I'm honest. It then seems to stop suddenly. If I accelerate less hard the smoke will last longer but again stop as if 'all used up'. No change to power etc. and for the next week or so it's absolutely fine even under the same driving conditions. Local garage have offered ideas- turbos, DPF, oil change but nothing that has helped. I'd not notice it if I didn't look in the rear view mirror but am worried about second hand smoke for the poor people behind!:o Any ideas. Thanks

[Graeme]

It sounds as though your engine hasn't had the updated secondary turbo drain fitted. The original drain retains oil after the engine has stopped because its scavenger pump stops which causes oil to eventually seep through the turbo seals (which were never designed to prevent such seepage) into the air inlet tract. When you occasionally give it a boot-full the secondary turbo opens so empties the pool through the engine. Either give it a boot-full more often or have the turbo drain replaced with the later design that goes directly to the sump rather than to the scavenger pump.

Edit: The same problem existed with the 4.4 TDV8 in the RR. Because the 4.4 needs a hole drilled and tapped into the side of the sump to fit its updated drain, some people regularly give the engine a burst rather than have the hole drilled. I fitted the new drain to my 3.0 TDV6 D4 but had the dealer fit the 4.4's because its a much bigger job.

[scomac]

I had the same white cloud of smoke occasionally, got the turbo drain fix done last week and no more smoke!
Cheers
Scott.

[rambada]

Ditto with mine. All good now.