My new TDV8 3.6 HSE (3000 miles on the clock) started to do a fair impression of a jumbo jet today - massive induction roar. A jubilee clips on one of the hoses coming from the airbox was very loose. I tightened that and the noise is a bit better, but still not right. Anyone else come across this? 14.5MY SDV6 HSE Dynamic Indus silver/lunar/ebony 20" wheels, InControl, full-size spare, electric tow bar, adaptive xenons, adaptive cruise control, auto main beam assist. Gone: TDV8 HSE; Zermatt silver/ebony, 19" off road alloys, active diff, particle filter, tow pack (it was fun) BMW 730D SE (great car, sadly missed). Ford Focus RS mk2, Ultimate green, lux pack 2, bluetooth. The start of my mid-life crisis.
IN THE GARAGE: BMW i8 - the mid-life crisis continues and it's great fun.

The old ones roar as well, usually on first start up of the day when engine cold, lasts longer in colder weather

I would be inclined to take a look at the other hoses to make sure all tight if not that possibly a split hose, had that on other vehicles  MY10 3.0 HSE Santorini Black, Ivory Premium & extended leather, privacy, paddles, diamond turned alloys, Ipod lead that charges, tasmods, rrsport.co.uk stickers

Jeep 4.0 High Output XJ 94 6" teraflex lift, c/w rear coils, 9500lb winch, 35" TSL super swamper boggers, safari snorkel, custom made bumpers, tom woods custom double cardon driveshaft, twin electric fans. Don't follow it..............you wont make it. The first 4 x 4 by far.

Thanks guys. This is definately a new sound - just started today. I have checked the other hoses and they seem OK. I agree a split seems a likely cause - not good after 3000 miles. I guess a trip to the dealer is called for. 14.5MY SDV6 HSE Dynamic Indus silver/lunar/ebony 20" wheels, InControl, full-size spare, electric tow bar, adaptive xenons, adaptive cruise control, auto main beam assist. Gone: TDV8 HSE; Zermatt silver/ebony, 19" off road alloys, active diff, particle filter, tow pack (it was fun) BMW 730D SE (great car, sadly missed). Ford Focus RS mk2, Ultimate green, lux pack 2, bluetooth. The start of my mid-life crisis.
IN THE GARAGE: BMW i8 - the mid-life crisis continues and it's great fun.

It was the viscous fan. Dealer tried to tell me it was normal. "So", I asked, "why did it only start doing it yesterday after 3000 miles and why didn't the car I test drove twice before placing my order do it?" He hadn't really got an answer to that, so up came the bonnet and he disconnected & then reconnected a plug coming from the fan housing. Apparently that will re-set it (whatever "it" is). Fair play, it has stopped making the noise now. Let's hope it stays that way. I'm happy with my RRS again  14.5MY SDV6 HSE Dynamic Indus silver/lunar/ebony 20" wheels, InControl, full-size spare, electric tow bar, adaptive xenons, adaptive cruise control, auto main beam assist. Gone: TDV8 HSE; Zermatt silver/ebony, 19" off road alloys, active diff, particle filter, tow pack (it was fun) BMW 730D SE (great car, sadly missed). Ford Focus RS mk2, Ultimate green, lux pack 2, bluetooth. The start of my mid-life crisis.
IN THE GARAGE: BMW i8 - the mid-life crisis continues and it's great fun.

Erm...I had this happen 5 years ago on a new TDV6 within 30 mins of picking it up. Had to go back. Hose not connected properly in the factory at back of engine block and dropped off. Took over an hour to put it back on. Sounded like a jumbo jet. TDV6 - gone
TDV8 - gone
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Old stager, has there been a couple of cool/cold nights recently in your area, because that can also trigger the viscous fan 2020 Pangea Green 1st Edition D240 New Defender 110 is here and loving it
2018 Melting Silver Mini Countryman PHEV - soon to be replaced
2015MY Corris Grey SDv6 HSE Dynamic, the best car I have ever owned, totally reliable only a cou0le of rattles in 3 years, now no longer in my care
Also in my garage is a 1996 TDi300 Defender 90 County HT made into a fake CSW

Tim in Scotland wrote:

Old stager, has there been a couple of cool/cold nights recently in your area, because that can also trigger the viscous fan

Probably not as cool as in your part of the world But, yes the dealer did tell me it would be affected by ambient temp and, yes, it certainly does roar more when the engine is cold - problem was that it was roaring all the time, even when hot. Hopefully the disconnect/reconnect thing has cured it; it was fine driving back from the dealer and coming home from work tonight

PS wonder why it's noisier when cold...would have thought the fan needed to be working less then. Or maybe it's the noise of the vicous coupling working harder (i.e. stopping the fan from wizzing round)  14.5MY SDV6 HSE Dynamic Indus silver/lunar/ebony 20" wheels, InControl, full-size spare, electric tow bar, adaptive xenons, adaptive cruise control, auto main beam assist. Gone: TDV8 HSE; Zermatt silver/ebony, 19" off road alloys, active diff, particle filter, tow pack (it was fun) BMW 730D SE (great car, sadly missed). Ford Focus RS mk2, Ultimate green, lux pack 2, bluetooth. The start of my mid-life crisis.
IN THE GARAGE: BMW i8 - the mid-life crisis continues and it's great fun.

I never had it with the TDv8 I had but occasionally it happened with the TDv6 I had before that and it happened every cold day (lower than about 5C) when I had the L322 FRR between 2003 and 2005 2020 Pangea Green 1st Edition D240 New Defender 110 is here and loving it
2018 Melting Silver Mini Countryman PHEV - soon to be replaced
2015MY Corris Grey SDv6 HSE Dynamic, the best car I have ever owned, totally reliable only a cou0le of rattles in 3 years, now no longer in my care
Also in my garage is a 1996 TDi300 Defender 90 County HT made into a fake CSW

Tim in Scotland wrote:

I never had it with the TDv8 I had but occasionally it happened with the TDv6 I had before that and it happened every cold day (lower than about 5C) when I had the L322 FRR between 2003 and 2005