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ChrisJC



Member Since: 14 Sep 2023
Location: Northants
Posts: 112
United Kingdom 2014 Range Rover Vogue SDV8 Aintree Green
O-rings in coolant hoses

I've just fixed the 94th coolant leak on my 4.4 SDV8 (2014), all caused by o-rings in the coolant hoses going 'flat'.

See pic below. This one was cheap - the vent hose from radiator top to expansion bottoe.

Is it just me?

It seems that I will have to spend the rest of my ownership changing o-rings one by one if the last 2 years is anything to go by...

Chris.

Click image to enlarge
 L405 - 4.4SDV8 Vogue
P38 - 4.6V8 HSE
Land Rover series IIA V8
Post #691167 23rd Apr 2024 5:30pm
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garyRR



Member Since: 13 Mar 2021
Location: Hampshire
Posts: 1463
United Kingdom 

So, my question is, how are you identifying the leaks? I'd love to be able to even identify 1.

These engine bays run so warm that it can often evaporate before you see it. 2015 Range Rover Autobiography 4.4 SDV8
Post #691177 23rd Apr 2024 9:26pm
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Dutchgit



Member Since: 17 Sep 2023
Location: Emmerich am Rhein
Posts: 178
Germany 2008 Range Rover Vogue TDV8 Stornoway Grey

I found that the red coolant in my 3.6 leaves red traces when dried up. One of them endoscope camera things for your phone might help.
Post #691181 24th Apr 2024 3:53am
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ChrisJC



Member Since: 14 Sep 2023
Location: Northants
Posts: 112
United Kingdom 2014 Range Rover Vogue SDV8 Aintree Green

garyRR wrote:
So, my question is, how are you identifying the leaks? I'd love to be able to even identify 1.

These engine bays run so warm that it can often evaporate before you see it.


Easy - it has a very characteristic smell. I can smell it just walking past the front of the vehicle.

So I keep my eye on the coolant and when it starts to go down faster I have to start investigating properly to find the leak.

Always an o-ring.

Chris. L405 - 4.4SDV8 Vogue
P38 - 4.6V8 HSE
Land Rover series IIA V8
Post #691182 24th Apr 2024 6:29am
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garyRR



Member Since: 13 Mar 2021
Location: Hampshire
Posts: 1463
United Kingdom 

Are you able to see the leaks, or do you use a pressure tester or UV dye or anything? 2015 Range Rover Autobiography 4.4 SDV8
Post #691185 24th Apr 2024 7:31am
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ChrisJC



Member Since: 14 Sep 2023
Location: Northants
Posts: 112
United Kingdom 2014 Range Rover Vogue SDV8 Aintree Green

It's bright pink anyway, so fairly easy to spot. The problem is usually the sheer amount of 'stuff' in the way, so an endoscope (USB camera), torch, and maybe removing some of the stuff is required just to confirm the leak is where you think it is.

Chris. L405 - 4.4SDV8 Vogue
P38 - 4.6V8 HSE
Land Rover series IIA V8
Post #691195 24th Apr 2024 11:20am
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