Mysterious Knocking Sound

bilzin · 24th July 2019, 11:01

Had ol' Betsy into another garage overnight to see if they could identify and cure the strange knocking noise from the front nearside

This noise doesn't affect the steering or braking, but jeez, is it annoying or what !

It sounds as though something is tapping against the bulkhead, and it occurs at any speed and 2 garages have heard it but have so far failed to diagnose the cause, so I wonder if any of you chaps have heard of this or could it be that I have a poltergeist passenger ?

bilzin · 24th July 2019, 11:55

Quote:

Originally Posted by bilzin

Had ol' Betsy into another garage overnight to see if they could identify and cure the strange knocking noise from the front nearside

This noise doesn't affect the steering or braking, but jeez, is it annoying or what !

It sounds as though something is tapping against the bulkhead, and it occurs at any speed and 2 garages have heard it but have so far failed to diagnose the cause, so I wonder if any of you chaps have heard of this or could it be that I have a poltergeist passenger ?

just had the 3rd garage on the blower ...and their verdict ???

'Our man has heard the noise but we are unable to identify it...my advice is to wait until it gets REALLY bad or something falls off and then something can be done'

the wonders of modern technology eh ?

Rich in Vancouver · 25th July 2019, 02:14

I have a similar noise on my ZT190.
I replaced the totally shot lower mount last weekend but now have a
distinct RAP that sounds like someone tapping the firewall at low speeds, or even when letting off the clutch when stationary.
The next step will be replacing the drop links. There's no harm in that anyway so it's worth a try. If that doesn't solve it???

I'll be watching this thread!

SCP440 · 25th July 2019, 06:51

It was the ball joints on my off side arm that did it on mine, I had checked it on my mates MOT testing shaker and no movement and had it in the air numerous times but it was not until I had it off the car that you could feel the movement at some angles.

Gilessmummy · 25th July 2019, 14:28

I have the same. I’ve had engine mounts fixed, exhaust brackets fixed,drop links done and it’s still there... I’ve had to learn to live with it ...

Arctic · 26th July 2019, 10:05

Get them to take a look at the lower wishbone bushes, they do not have to be completely gone to send a knocking sound onto the fire wall or at the front of the car, they could just be very weak due to age.

myfirstrover · 26th July 2019, 16:08

I had the same thing , it stopped when I let the wife out of the boot

roverbarmy · 26th July 2019, 16:39

Battery holding down bolt come loose? Loose wheel bolts? Track rod ends/ Inner tie rods/ drive shaft joints or splines? Wishbone rear bush or drop links/ball joints? Glove box contents (CDplayers come loose if you have one there)? Strut top mount bearing? Lower engine mount? Undertray fixings loose or missing? Anti roll bar bushes worn? Gearbox linkage or mountings?

stocktake · 26th July 2019, 17:22

Quote:

Originally Posted by SCP440

It was the ball joints on my off side arm that did it on mine, I had checked it on my mates MOT testing shaker and no movement and had it in the air numerous times but it was not until I had it off the car that you could feel the movement at some angles.

Same here i'm afraid, I'd been through all the ARB bushes, drop links, strut top bearings and arm bushes. Finally had the lower arms changed ( around three yr ago now) and it cured the problem

madeupname · 26th July 2019, 19:51

Wishbone bush should be easy to check. Wheel off, reach in, wobble up and down

24th July 2019, 11:01	#1
bilzin Avid contributor Rover 75 V6 Connoisseur Join Date: Jun 2015 Location: Swindon Posts: 113 Thanks: 80 Thanked 49 Times in 18 Posts	Mysterious Knocking Sound Had ol' Betsy into another garage overnight to see if they could identify and cure the strange knocking noise from the front nearside This noise doesn't affect the steering or braking, but jeez, is it annoying or what ! It sounds as though something is tapping against the bulkhead, and it occurs at any speed and 2 garages have heard it but have so far failed to diagnose the cause, so I wonder if any of you chaps have heard of this or could it be that I have a poltergeist passenger ? __________________ Make Yarmouth great again Last edited by bilzin; 24th July 2019 at 11:57..

25th July 2019, 02:14	#3
Rich in Vancouver Gets stuck in MG ZT-T Join Date: Jun 2016 Location: White Rock, BC on Canada's Pacific Coast Posts: 849 Thanks: 338 Thanked 367 Times in 210 Posts	I have a similar noise on my ZT190. I replaced the totally shot lower mount last weekend but now have a distinct RAP that sounds like someone tapping the firewall at low speeds, or even when letting off the clutch when stationary. The next step will be replacing the drop links. There's no harm in that anyway so it's worth a try. If that doesn't solve it??? I'll be watching this thread! __________________ ZT-T190, Anthracite, LHD, Left the Line on June 24, 2002, Sold new in Switzerland, spent time in Germany, Imported to Canada in September 2021

26th July 2019, 10:05	#6
Arctic Give to Learn Freelander 2 Join Date: Aug 2010 Location: West Midlands Posts: 18,694 Thanks: 1,155 Thanked 6,407 Times in 3,874 Posts	Get them to take a look at the lower wishbone bushes, they do not have to be completely gone to send a knocking sound onto the fire wall or at the front of the car, they could just be very weak due to age. __________________ Arctic Givology Learn to Give Everything is Achievable ad altiora tendo. Check out our Nano meet dates http://www.midlandsnanomeets.co.uk/ http://www.the75andztclub.co.uk/index.php?thepage=howto " You do the work , we supply the expertise "

26th July 2019, 16:39	#8
roverbarmy This is my second home Roverless + 1.7D Sportage Join Date: Aug 2014 Location: East Norfolk Posts: 7,049 Thanks: 729 Thanked 2,021 Times in 1,449 Posts	Battery holding down bolt come loose? Loose wheel bolts? Track rod ends/ Inner tie rods/ drive shaft joints or splines? Wishbone rear bush or drop links/ball joints? Glove box contents (CDplayers come loose if you have one there)? Strut top mount bearing? Lower engine mount? Undertray fixings loose or missing? Anti roll bar bushes worn? Gearbox linkage or mountings? __________________ Oil in my veins!

26th July 2019, 19:51	#10
madeupname Posted a thing or two Rover 75 Connie Mk2 1.8 (Mo) Join Date: Feb 2017 Location: Sheffield Posts: 1,531 Thanks: 875 Thanked 335 Times in 289 Posts	Wishbone bush should be easy to check. Wheel off, reach in, wobble up and down __________________ Mo was born Tuesday, 22nd June 2004 @ 08:32:41 This vehicle was the 99,307th 75 to run off the production line, out of 112,381 This vehicle was the 5,377th 75 1.8 Connoisseur to be made out of 6,033 This vehicle was the 783rd 75 in Firefrost Red (code: CEV) to be made out of 2,089 Firefrost Red 75s

25th July 2019, 06:51	#4
SCP440 I really should get out more....... MG ZT-T 260 Join Date: Feb 2016 Location: Witney Posts: 2,504 Thanks: 6 Thanked 910 Times in 571 Posts	It was the ball joints on my off side arm that did it on mine, I had checked it on my mates MOT testing shaker and no movement and had it in the air numerous times but it was not until I had it off the car that you could feel the movement at some angles.

25th July 2019, 14:28	#5
Gilessmummy Newbie Rover 75 Join Date: Sep 2016 Location: Ampthill Posts: 5 Thanks: 0 Thanked 1 Time in 1 Post	I have the same. I’ve had engine mounts fixed, exhaust brackets fixed,drop links done and it’s still there... I’ve had to learn to live with it ...

26th July 2019, 16:08	#7
myfirstrover Posted a thing or two Rover 75 2.0 cdi Join Date: Mar 2011 Location: Newcastle upon Tyne Posts: 1,896 Thanks: 401 Thanked 448 Times in 303 Posts	I had the same thing , it stopped when I let the wife out of the boot

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