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Defekas



Member Since: 08 Apr 2025
Location: Tallinn
Posts: 4
Estonia 1999 Defender 90 Td5 HT Masai Red
Whining sound in tune with rpm
Hi all!

Im new user from Estonia and battling with a strange issue. Couple weeks ago i noticed a strange whine has come together with engine sound and now it’s gone worse. Sounds like hydraulics but nothing doesn’t change when turning the wheels, so I suspect it’s not the power steering unit.

My car has TD5 engine.

Tomorrow have a meeting at mechanics (he’s not a Landy guy) but I’m asking your opinions what it could be, as maybe someone will recognize the sound and can direct mechanic/me to the right direction.

Video with the sound mentioned:
https://youtube.com/shorts/ZvCjQZi6_lU?si=-JGnOQbzsLv-DP_5

All opinions are appreciated.

Thanks!
Post #1065013 8th Apr 2025 4:31pm
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Screbble



Member Since: 26 Apr 2015
Location: Lancashire
Posts: 2161
United Kingdom 2004 Defender 90 Td5 XS CSW Zambezi Silver
Hi and welcome.

Could it be something as simple as a bearing on a pulley?

Does it make the noise when the vehicle is not being g driven?

Best of luck 👍
Post #1065016 8th Apr 2025 4:38pm
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Defekas



Member Since: 08 Apr 2025
Location: Tallinn
Posts: 4
Estonia 1999 Defender 90 Td5 HT Masai Red
Thanks for the input. Yeah the sound comes in correlation with rpm, doesn’t matter if car is stationary or driven.
Post #1065017 8th Apr 2025 4:48pm
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landy andy



Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 5857
2006 Defender 110 Td5 USW Zermatt Silver
Sounds like it will be one of the serpentine belt driven items. Alternator, tensioner, pump, ac.

Remove fan and belt. Test. Then hand spin each item as see how it feels/sounds.
Post #1065018 8th Apr 2025 4:54pm
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TexasRover



Member Since: 24 Nov 2022
Location: Paris
Posts: 1224
France 2002 Defender 110 Td5 DCPU Chawton White
Noisy centrifuge filter?
Post #1065036 8th Apr 2025 8:25pm
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Defekas



Member Since: 08 Apr 2025
Location: Tallinn
Posts: 4
Estonia 1999 Defender 90 Td5 HT Masai Red
Thanks for all the opinions. I’ve removed the belt and noise stopped. One pulley was not rotating freely.
Next step is to order the idler pulley, tensioner pulley and belt. Let’s hope that solves the case, if not, then next step is the alternator or power steering unit.

I guess the correct code for TD5 no ACE and no A/C is ERR6658.


Will keep you posted.


Click image to enlarge
Post #1065081 9th Apr 2025 8:43am
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Screbble



Member Since: 26 Apr 2015
Location: Lancashire
Posts: 2161
United Kingdom 2004 Defender 90 Td5 XS CSW Zambezi Silver
Glad you’ve found the culprit. An easy enough job to do.
I had the same issue a number of years ago.

Be careful as I bought a ‘cheap’ replacement pulley that sounded just as noisy - upon inspection the bearing was cheap and poorly fitted. I then bought an OEM replacement and it was sorted. Unfortunately I can’t remember the brand of the first replacement part but I can’t emphasise enough how poor the quality was. Comparing the two was night and day.

What’s that saying…buy cheap buy twice!
Post #1065082 9th Apr 2025 8:50am
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TexasRover



Member Since: 24 Nov 2022
Location: Paris
Posts: 1224
France 2002 Defender 110 Td5 DCPU Chawton White
Excellent, good and quick diagnostics have you homing in on hopefully a quick fix.

If you are on a tight budget (or are just tight) on the the steel idlers you can replace the bearings. Not sure by heart on the Td5, but on the Rover V8s I keep the old ones and they can be fitted at the right application as they are quite univeral. In fact I fitted one on my ride-on lawnmower last year.
Post #1065084 9th Apr 2025 8:54am
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Hazza



Member Since: 10 Jan 2011
Location: North Yorkshire / Leeds
Posts: 226
United Kingdom 1990 Defender 110 Td5 HT Bronze Green
Idler pulley and tensioner bearings can definitely be replaced. At least if you do this you can choose a high quality bearing so hopefully get some more longevity.

The bearing at the rear of the alternator, which supports the front of the vacuum pump can also fail. 1990 Defender 110 200TDI Camper - now converted to Td5 power
Post #1065262 10th Apr 2025 9:17pm
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Defekas



Member Since: 08 Apr 2025
Location: Tallinn
Posts: 4
Estonia 1999 Defender 90 Td5 HT Masai Red
I've changed two idler pulleys, tensioner pulley and the belt. Problem solved and no more whining. Thanks guys for the ideas and support.

I bought new items and did not change the bearings itself.

Part numbers for future references:
ERR6951 (DAYCO) 73€
ERR6658 (ALLMAKES) 55€
PQS101490 (LR Genuine) 12€
ERR6493 (ALLMAKES) 84€

Now heard a new noise that comes from engine fan visco clutch. Intermittent crackling every 2-3 seconds. Will change that too.
Post #1065352 12th Apr 2025 4:37pm
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Screbble



Member Since: 26 Apr 2015
Location: Lancashire
Posts: 2161
United Kingdom 2004 Defender 90 Td5 XS CSW Zambezi Silver
Glad you sorted the original issue 👍

Good luck with the next.
Post #1065414 13th Apr 2025 3:40pm
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