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Suspension bush check - how to check hydro bushes etc?
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twr7cx
 


Member Since: 03 Mar 2019
Location: Tasmania
Posts: 122

Australia 2012 Discovery 4 TDV6 Base 5 Seat Auto Nara BronzeDiscovery 4
Suspension bush check - how to check hydro bushes etc?

I've not previously had anything to do with a vehicle with hydro bushes. Our D4 has a front end suspension clunk on fairly small bumps such as when going over driveway lips or the rail that a sliding gate runs on it. Given that it's at 155,000km and there's no evidence of the front lower control arms previously having been done I assume these are a likely culprit with the hydro bushes failed.

From what I've seen online sometimes you can observe the fluid leak from within them. But if this isn't the case, any tips or hints for checking these? Just the usual try and pry/move/wriggle all the joints looking for slop and play?
 Mine - modified MY03 LT L318 Discovery 2a HSE Td5 15P
Hers - MY12 L319 Discovery 4 Lion 2.7L TDV6
Dads - MY98 LJ Discovery ES 3.9L V8 
 
Post #21855429th Nov 2020 4:06 am
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Ali1971
 


Member Since: 13 Jun 2016
Location: Dalgety Bay
Posts: 665

Scotland 2012 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

I’ve had mine done , I think you might need to get a metal bar and prise the bush to see movement. I had the clunk , want even picked up in the MOT but was when in the dealer for a service.
  
Post #21857709th Nov 2020 9:17 pm
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knwatkins
 


Member Since: 19 Sep 2018
Location: Poole, Dorset
Posts: 704

United Kingdom 

Sharply dab the breaks when travelling around 20mph+. When worn, the hydrabush (the rearmost bush in the front lower suspension arm) will always cause a knock when dabbing the brakes.
 Kev

MY2014 L405 RR Vogue SE 4.4 SDV8 in Corris Grey
MY2010 L320 RRS HSE 3.0 TDV6 in Stornoway Grey 
 
Post #21857849th Nov 2020 10:07 pm
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MintyHit
 


Member Since: 25 Jul 2017
Location: London
Posts: 138

United Kingdom 2005 Discovery 3 4.4 V8 HSE Auto Java BlackDiscovery 3

I could see loads of movement in my rear uppers but just jacking up a wheel and pushing / pulling the tyre is different directions.

....edit, I guess this could also be a knacked wheel bearing so best get someone to watch to the bushes as you do it.
  
Post #218584310th Nov 2020 10:53 am
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charlietortoise
 


Member Since: 29 Oct 2011
Location: Staffordshire
Posts: 405

2010 Discovery 4 3.0 TDV6 HSE Auto Barolo BlackDiscovery 4
Bush

I just gently bounced mine up and down a high kerb. The clunk was obvious to hear and my indi identified which side by looking at the wheel horizontal movement on the bounce up.

If its clunking then it makes driving the car less enjoyable. Speed bumps in particular were cringeworthy. All else it didnt seem to make a noticeable difference.

Post replacement the car is a much more peaceful place to be
 Discovery 4 3.0 HSE 2010 year. I like it a lot. Now with winch 😂  
Post #218587010th Nov 2020 1:22 pm
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twr7cx
 


Member Since: 03 Mar 2019
Location: Tasmania
Posts: 122

Australia 2012 Discovery 4 TDV6 Base 5 Seat Auto Nara BronzeDiscovery 4

Stuck a pry bar between the chassis mount and front lower control arm rear bush, didn't take my effort to move the arm a few mm outwards. When I physically looked at the limited bit of the hydrobush that I could see the rubber etc. looked damaged. Pricing up delivery now for a replacement set of OEM arms from the UK.
 Mine - modified MY03 LT L318 Discovery 2a HSE Td5 15P
Hers - MY12 L319 Discovery 4 Lion 2.7L TDV6
Dads - MY98 LJ Discovery ES 3.9L V8 
 
Post #218669613th Nov 2020 10:54 am
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goodo
 


Member Since: 04 Dec 2018
Location: Cheltenham
Posts: 50

United Kingdom 2010 Discovery 4 3.0 TDV6 HSE Auto Santorini BlackDiscovery 4

Ali1971 wrote:
I’ve had mine done , I think you might need to get a metal bar and prise the bush to see movement. I had the clunk , want even picked up in the MOT but was when in the dealer for a service.


Agree, you need a specialist to check it out. Ours got through the MOT with two rear upper arms with worn out bushes. After it's first service they were immediately spotted by someone who knows their onions. lift the wheel off the floor, get a bar wedge it in and try to see if there's any play.
  
Post #218811219th Nov 2020 3:27 pm
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