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DISCO3.CO.UK > Technical (D3)

TDV6 Water Distribution Housing

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reb78

Member Since: 21 Apr 2018
Location: Herts
Posts: 217

2007 Discovery 3 TDV6 GS Auto Baltic Blue

TDV6 Water Distribution Housing

I am just replacing the water distribution housing on the front of the block on the TDV6. It comes with the two O rings that press down onto the head, but there appears to be a third O ring at the back above what looks like a heat exchanger of sorts. Land Rover conveniently don't supply that O ring with the distribution housing even though you will have to disturb it to fit the housing you have bought!

I guess I should replace this whilst the housing is off? Does anyone have a part number as I cant locate the part anywhere?

17th Feb 2019 3:59 pm

reb78

Member Since: 21 Apr 2018
Location: Herts
Posts: 217

Looking closer it is the o ring on the oil cooler in front of the oil filter. I cant see it listed as a seperate part - do folks just leave these?

17th Feb 2019 4:10 pm

SteveNorman

Member Since: 14 Oct 2005
Location: Somerset
Posts: 1144

Don't leave it, as it will leak most likely when refitted.

Order from a Citroen dealer (or Peugeot I suspect)
Part number you need is 198171

regards
Steve

17th Feb 2019 4:15 pm

reb78

Member Since: 21 Apr 2018
Location: Herts
Posts: 217

Thanks for that - what a pain. I wonder why they don't supply this - a few pennies really, it should be in with the distribution housing.

Looks like Peugeot and Citroen use the same part number as you thought: https://www.bestpartstore.co.uk/707688-bosch-rubber-ring

There is a Pug dealer locally so I may pop up there tomorrow or just order the one in that link.

17th Feb 2019 4:33 pm

Sea Raider

Member Since: 01 Nov 2016
Location: None
Posts: 4450

I feel your pain

https://www.disco3.co.uk/forum/water-conne...76285.html

17th Feb 2019 4:42 pm

reb78

Member Since: 21 Apr 2018
Location: Herts
Posts: 217

Thanks for that.

I have a box of generic o rings (think it came from toolstation). They seem a good quality, but I am always wary of using them on vital bits like this. I will see if I can get a citroen one tomorrow. 'Luckily' I have two other land rovers whilst this one is off the road!!

ETA: having exposed it properly, I dont think any of my generic o rings will fit that. I will try Peugeot tomorrow.

17th Feb 2019 5:04 pm

Sea Raider

Member Since: 01 Nov 2016
Location: None
Posts: 4450

I was weary but the one I used is holding just fine not more leakage

17th Feb 2019 5:37 pm

Sea Raider

Member Since: 01 Nov 2016
Location: None
Posts: 4450

When I first exposed the O ring I thought it looked a lot fatter than the usual ones but when I removed it I found that over time it had been flattened.

17th Feb 2019 5:39 pm

sarumlight

Member Since: 07 Nov 2008
Location: Off the Plain
Posts: 1590

2008 Discovery 3 TDV6 HSE Auto Tonga Green

I had an Audi which did 200,000 miles with an o-ring from a caravan toilet stopping the oil falling out of the vacuum pump. It’s still going strong but much better to have the right part!!

17th Feb 2019 5:44 pm

reb78

Member Since: 21 Apr 2018
Location: Herts
Posts: 217

Sea Raider wrote:
When I first exposed the O ring I thought it looked a lot fatter than the usual ones but when I removed it I found that over time it had been flattened.

Mine has gone very flat. I dont want to remove it (and likely damage it in the process) until I know for sure I have a replacement!)

17th Feb 2019 6:20 pm

reb78

Member Since: 21 Apr 2018
Location: Herts
Posts: 217

Some pics of the housing. It looks like its been weeping and where the coolant has dried its just a sticky residue.

Not a lot of coolant came out on removal which was a little worrying. The bleed hose seemed empty when i disconnected it.

17th Feb 2019 6:25 pm

reb78

Member Since: 21 Apr 2018
Location: Herts
Posts: 217

Ordered from Peugeot - £6.11, bit pricey but peace of mind that it will be replaced. I will pick it up tomorrow.

18th Feb 2019 1:01 pm

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