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30th March 2021, 20:30 | #1 |
Newbie
Rover 75 Saloon Join Date: Nov 2020
Location: Stockton-on-Tees
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Strange sound?
Driving my 2005 diesel powered Rover 75, I've noticed a wooing sound. Its most clear at low speeds 30mph and rises and falls with the engine speed. Its related to the engine. Its not very loud but clear once I tune in to it. When I have switched of the engine I hear what sounds like a fan stopping? Has anybody come across this or a similar issue. Any thoughts welcome.
Thanks in advance. |
30th March 2021, 20:35 | #2 |
I really should get out more.......
75 CDT SE 160 Saloon Join Date: May 2017
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Do you have your aircon on ?
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30th March 2021, 21:13 | #3 |
This is my second home
rover 75 1.8 vvc club se wedgwood blue Join Date: Aug 2009
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Does it sound like a whale whoop?
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30th March 2021, 21:17 | #4 |
This is my second home
Rover 75 cdt club + Rover 2.5 KV6 Conni SE Join Date: May 2008
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Have you got a fbh? If you have it might be that starting up, but it would not go up and down with different engine revs.
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30th March 2021, 23:16 | #5 |
Give to Learn
Freelander 2 Join Date: Aug 2010
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Hi Alan.
Check your fan is working on low speed, do the demist test, and report back in the mean time read the link below. https://www.the75andztclub.co.uk/for...d.php?t=130557
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31st March 2021, 07:11 | #6 | |
Gets stuck in
MG ZT 2.0 cdti Join Date: Aug 2019
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Quote:
Like you've said, engine speed related, no fans on or anything.
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31st March 2021, 07:50 | #7 |
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Rover 75 Saloon Join Date: Nov 2020
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Not sure what a whale whoop sounds like? LOL its more of ghost wooo....maybe It haunted.
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31st March 2021, 12:23 | #8 |
This is my second home
Rover75 and Mreg Corsa. Join Date: Nov 2006
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When my aircon needed regassing, there was a distinctive, speed-related 'wooo'. It's the transfer valve in the evaporator feed that's unable to balance the thermal demand with the available gas. A top up fixed it.
TC |
31st March 2021, 12:56 | #9 | |
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1.8t Tourer Join Date: Oct 2011
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Quote:
It's the aircon for sure. Usually related to lack of cooling, and that is normally to low speed fan failure. but could be that the condenser has lost all it's fins, could also be issues with aircon compressor pump, or incorrect gas pressure.
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31st March 2021, 16:03 | #10 | |
This is my second home
Rover75 and Mreg Corsa. Join Date: Nov 2006
Location: Sumweer onat mote o'dust (Sagin)
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Quote:
To know for sure if this is the reason, take the bumper off undo fan surround to gain access to the aircon condenser in front of the engine radiator. There should be fins across the full area of the matrix. They may all drop away by running your finger across them. TC |
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