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100kph bee?

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100kph bee?

Postby AdyP » Thu Feb 13, 2014 4:38 pm

Getting to know and love my car's many audible features, growling engine, burbling and popping exhaust, rattling dash... :rolleyes:

One which has me a bit stumped is an intermittent hum that comes from the car when driving straight on a smooth road, and only appears between 90kph and 100. It sounds like when you go over rumble strips on the way to a roundabout, except much quieter, more like a slightly textured road I guess.

Tracking is fine, tyres are fine, balancing is fine, happens in and out of gear, brakes applied or not, wipers swishing or not. If it was a constant sound I could put it down to something loose, but it has this regular cycling "hum...quiet...hum...quiet" action and I have no idea what it might be. And no it is not my phone smart-ar$es :p

I doubt any of you are expert enough to diagnose something like this via a vague forum post, but if you have experienced this maybe it would help me pin down the cause. Until then..."Sorry Guard, I had to do 120 in a 100 as my car makes this annoying buzzing noise..."
Last edited by AdyP on Mon Mar 03, 2014 6:09 pm, edited 1 time in total.
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Re: 100kph bee?

Postby MiniMpi » Thu Feb 13, 2014 5:56 pm

Spray some pesticide in the car maybe ? :)

Buzz's/rattles etc can be so annoying though.
I don't have this particular buzz but I have one that I get when accelerating at about 4000/4500 rpm.
I think I've narrowed it down to the driver's side rear grab handle.
Might be worth tightening up all the grab handles ?
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Re: 100kph bee?

Postby AdyP » Thu Feb 13, 2014 7:08 pm

Thanks Ferg! Great idea, except it led to a loud coughing and swerving motion until the fumes dissipated...

I've been on several bmw forums and they seem to see a similar thing relating to wheel bearings that are on their way out...no too crazy a thing to swap out but I would probably change both fronts just in case, and that is obviously more cash on a "maybe" fix.
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Re: 100kph bee?

Postby Masterbiker » Mon Feb 17, 2014 1:17 pm

AdyP wrote:Thanks Ferg! Great idea, except it led to a loud coughing and swerving motion until the fumes dissipated...

.


haha
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Re: 100kph bee?

Postby AdyP » Wed Mar 05, 2014 10:11 pm

Ok after some testing I am fairly confident it is a wheel bearing which is starting to go. I have a new one ordered from Minisparesuk so will throw that on and see if that solves the problem! Fingers crossed!
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Re: 100kph bee?

Postby irlmin » Wed Mar 05, 2014 11:28 pm

I felt it was nothing about 30 bhp more wouldn't cure !!!!!!! :) :rolleyes: lol .
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Re: 100kph bee?

Postby AdyP » Thu Mar 06, 2014 12:46 pm

Ah the Clarkson strategy! Drown out little annoying noises with big growly ones! Like it :)
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Re: 100kph bee?

Postby MiniMpi » Thu Mar 06, 2014 8:54 pm

irlmin wrote:I felt it was nothing about 30 bhp more wouldn't cure !!!!!!! :) :rolleyes: lol .
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POWER !!!!!!!!!! :D
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Re: 100kph bee?

Postby oliver » Sat Mar 08, 2014 6:27 am

Drown out the noise with METAL :1icon_twisted:
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Re: 100kph bee?

Postby AdyP » Sat Mar 22, 2014 8:57 pm

Several hours of fun today! The bearing is well and truly welded on there and refuses to budge from the driveshaft!! Having to accept defeat and book it into MINI to see if they can remove it.
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Re: 100kph bee?

Postby Masterbiker » Sun Mar 23, 2014 11:14 pm

You don't have a blow torch to try heating it up?
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Re: 100kph bee?

Postby AdyP » Mon Mar 24, 2014 5:31 pm

No I don't, but not sure how much heat we would need to apply. The hub removal tool was bending under the pressure of trying to get it loose, so it is tight on there!
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Re: 100kph bee?

Postby MiniMpi » Tue Mar 25, 2014 5:49 am

Oh crap......not good buddy :(
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Re: 100kph bee?

Postby AdyP » Thu Apr 10, 2014 6:47 pm

So...last week we applied heat from two torches to the bearing until it was pretty darned hot, then continued beating on it, with more swearing!

Nope. Nada.

Left it overnight to cool down before reassembling the next morning.

The car went into Joe Duffy's this morning and by lunch it was done. Happily enough it was a major challenge to them as well, but removing the shaft from the car and utilising a 20-ton press it came free. No chance I was going to get that thing out anyway (which I am oddly pleased about).

The bee is dead...long live the bee!
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Re: 100kph bee?

Postby MiniMpi » Thu Apr 10, 2014 7:16 pm

WOO HOO !!!
Delighted that annoying buzzing is gone for you buddy :)
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