|
||
|
4th June 2021, 22:02 | #1 |
Regular poster
Rover 75 Saloon Join Date: Dec 2010
Location: Halesowen
Posts: 37
Thanks: 0
Thanked 3 Times in 3 Posts
|
CDti Humming Noise
Hi everyone, I have 2004 conne cdti. I was doing some jobs on the car today and could hear a humming noise coming from somewhere. Ignition is off. FBH is ok, under bonnet pump is ok. I can't seem to trace where it's coming from. I thought at first it was coming from underneath the air filter housing, then closed the bonnet and listened through the grill still there. Thought it might be coming from the alternator, although the ignition is off. Has anyone come across this or any ideas, please.
|
5th June 2021, 08:28 | #2 |
Premium Trader
Rover 75 Join Date: Nov 2010
Location: Devon
Posts: 33,763
Thanks: 8,837
Thanked 14,831 Times in 8,030 Posts
|
You need to listen to various areas using a stethoscope or a long screwdriver against your ear, that should highlight any strange sounds.
__________________
Lest we forget..
|
5th June 2021, 08:57 | #3 |
Regular poster
Rover 75 Saloon Join Date: Dec 2010
Location: Halesowen
Posts: 37
Thanks: 0
Thanked 3 Times in 3 Posts
|
Humming Noise.
Thanks for that. I went out this morning and the noise is still there. Strange.
|
5th June 2021, 11:42 | #4 |
Posted a thing or two
R 75 Tourer diesel Conny 2002, V6 Conny saloon petrol 2003 Join Date: Mar 2013
Location: Taunton
Posts: 1,125
Thanks: 212
Thanked 406 Times in 223 Posts
|
Bees, possibly?
__________________
Rover 75 Tourer Conny 2002 remapped 160 auto, R75 V6 2.5L auto Connoisseur 2003 |
5th June 2021, 11:44 | #5 |
This is my second home
Land Rover Join Date: May 2013
Location: Thorpe St Andrew,Norwich
Posts: 14,715
Thanks: 933
Thanked 2,925 Times in 1,979 Posts
|
sometimes the sat nav in the boot have been prone to staying on,could be disc whirring in that (if you have sat nav).
__________________
Steve and Georgie Together Forever Lonely days are long Twilight sings a song All the happiness that used to be Soon my eyes will close Soon I'll find repose And in dreams, you're always near to me I'll see you in my dreams And then I'll hold you in my dreams |
5th June 2021, 13:12 | #6 |
Gets stuck in
MG ZT Join Date: Jul 2014
Location: Liverpool
Posts: 850
Thanks: 180
Thanked 248 Times in 189 Posts
|
Bee's Buzz not Hum
I'm not sure you would hear the sat nav in the boot via the front grill I would agree you are on the right track with the alternator though! I had a Rover 800 that gave off a high pitched tone when switched off. and would drain the battery in less than 2 days if car not used. IIRC it was the diodes at fault.
__________________
[SIGPIC][/SIGPIC] |
5th June 2021, 21:11 | #7 |
This is my second home
R75 Saloon. Join Date: Feb 2009
Location: France/or Devon.
Posts: 14,003
Thanks: 3,851
Thanked 2,167 Times in 1,816 Posts
|
Take off the negative lead on the battery and put a multi-meter in line.--A noise loud enough to hear will show up as power being used somewhere.--( Use the meters current setting. )
|
5th June 2021, 23:00 | #8 |
Regular poster
Rover 75 Saloon Join Date: Dec 2010
Location: Halesowen
Posts: 37
Thanks: 0
Thanked 3 Times in 3 Posts
|
Humming Noise.
Thanks for all the replies. I've ordered a stethoscope and will see if that picks it up. I will also unplug the alternator to see if that the problem. If it is I presume it's faulty and will need replacing.
|
6th June 2021, 00:20 | #9 |
This is my second home
Rover 75 Saloon CDTi Join Date: Oct 2015
Location: Belvedere
Posts: 4,076
Thanks: 108
Thanked 1,089 Times in 774 Posts
|
Unplugging the alternator is not enough, when mine developed a fault I had to remove the heavy lead that is bolted on too as this is where the output is and mine was a diode fault.
|
7th June 2021, 13:54 | #10 |
Regular poster
Rover 75 Saloon Join Date: Dec 2010
Location: Halesowen
Posts: 37
Thanks: 0
Thanked 3 Times in 3 Posts
|
Humming Noise.
Hi everyone, Found the fault which is the alternator. Fortunately, I've got a parts warranty on it so no dirty hands for me. Thanks again for all the tips and advice.
|
Thread Tools | |
Display Modes | |
|
|