Engine noise - nothing sinister opinions wanted

[///MCollection]

Hi all

In for end of warranty check tomorrow and just a question

My engine when warm and driving though an area that reflects noise sounds whiny. The whine is not a massive whine just an underlying whine

I've asked them before and they say it's normal but the f85 is quite scarce where I live and have no comparison

It just sounds a bit crap over the largely satisfying exhaust note but not like a fault as such

Same with aircon on or off.

[640ijims]

Not much to go on here.....but if it overwhelms exhaust note, I would be concerned. Sounds like a bearing in some component could be under stress, or a belt tension device near its end ( probably bearing in tensioner. )Tough to localize with all the engine covers...you might spend a hundred £ plus or so for a "tear off covers" diagnostic if not under warranty.

[StatenEye]

Originally Posted by ///MCollection

Hi all

In for end of warranty check tomorrow and just a question

My engine when warm and driving though an area that reflects noise sounds whiny. The whine is not a massive whine just an underlying whine

I've asked them before and they say it's normal but the f85 is quite scarce where I live and have no comparison

It just sounds a bit crap over the largely satisfying exhaust note but not like a fault as such

Same with aircon on or off.

That's your transmission whining.Normal.

[///MCollection]

Sorry it was a bit off a rushed post. It doesn't overwhelm the exhaust far from it. It's just quite noticeable when it can echo off something.

So when I drive home I go through a small village with houses either side and when off the throttle or just on it the noise is what I hear as the exhaust is quiet.

[///MCollection]

Pretty sure it's not the transmission as if I am in neutral it goes in line with engine revs and sounds like it's at the front.

[StatenEye]

Originally Posted by ///MCollection

Pretty sure it's not the transmission as if I am in neutral it goes in line with engine revs and sounds like it's at the front.

Oh i would need to hear it then. If I rev the car out then let go of the gas while at a high RPM rather than up-shifting to slow down for a light, I'll hear a whine, which is expected. Have them look into the issue they will report back with nothing found but have that documented. If something goes wrong with a belt driven component, transmission or engine (unlikely) you will have documented evidenced you asked for this to be fixed while under warranty. This will go a long way towards them covering the bill if something related to a whine were to fail in the relatively near future.

Specifically ask them to check belts, AC compressor, transfer case and transmission for a whine. Since its at idle i would guess a belt.. if it were only on load.. transmission, transfer case and differential would be possible culprits. Good luck.

Edit when you're in the car everything sounds like its coming from the engine bay, this car has pretty good sound isolation from the firewall back.

[Hausi]

I have similar in my first X5M and again in my second - did you get this resolved?