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Oil cooler leak
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cpilkinton
 


Member Since: 07 Mar 2021
Location: Auckland
Posts: 3

New Zealand 2006 Discovery 3 TDV6 HSE Auto Barolo BlackDiscovery 3
Oil cooler leak

Hi all from New Zealand!

I recently found oil leaking from underneath the vehicle. On closer inspection I found the V at the top of the engine filled with oil. I only serviced the truck a month prior so all indications pointed towards a leaking oil filter housing. Cleaned out the V and replaced the oil filter and O ring. Placed rags around the filter housing and drove the truck for awhile - no oil leaking from the housing. However a small amount of oil back in the V. Hoping this is just dregs of oil I couldn't clean off the first time round - not a leaking oil cooler... Sad

While investigating the oil leak I also found the source of a coolant leak I was quietly tracking. Coolant seems to be leaking from the oil cooler (between the small fuel cooler and oil cooler) - see attached photos. Water outlet assembly previously replaced and inspected this week - it's not leaking.

I have seen some second hand fuel coolers on the internet and some pictures of the units separated. It seems there are 2 gaskets between them. Does anyone know where I can find these gaskets or is it possible to make them? Is it worth reconditioning the unit or replacing the entire oil cooler? - an expensive option for a small leak.

I'm hoping no more oil shows up and I can just repair the fuel cooler. However the leaking coolant washing oil off dirty parts is making it hard to determine if there is in fact an oil leak or if it was only leaking from the filter housing.

Please see attached pictures. Thanks in advance! 

Last edited by cpilkinton on 7th Mar 2021 9:27 am. Edited 1 time in total 
Post #22157037th Mar 2021 7:51 am
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gstuart
 


Member Since: 21 Oct 2016
Location: kent
Posts: 13631

United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3

Hiya and welcome to the asylum, lol

Haven’t done the job myself but Found a good series of videos ref the oil cooler , parts catalogues and supplier of parts

Hope that helps u a little

Ps, no pics shown in ur post or gallery I’m afraid

Parts catalogue

http://new.lrcat.com/#!/12128/41216/42091

Parts supplier

https://www.advancedfactors.co.uk/oil-filter--cooler-1607-c.asp

Video link below

https://youtube.com/playlist?list=PLI-65_g...tNODjBLIrV   
Post #22157047th Mar 2021 8:15 am
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lynalldiscovery
 


Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274

United Kingdom 2006 Discovery 3 TDV6 Metropolis LE Auto Bonatti GreyDiscovery 3

Brake cleaner is excellent for cleaning parts of oil stains/leaks.
Do noy buy aerosols as to dear, buy 5 litres from ebay etc  
Post #22157137th Mar 2021 9:22 am
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cpilkinton
 


Member Since: 07 Mar 2021
Location: Auckland
Posts: 3

New Zealand 2006 Discovery 3 TDV6 HSE Auto Barolo BlackDiscovery 3

Thanks for the Oil cooler details! I have seen the videos which are super helpful! I was hoping however I wouldn't need to change the cooler at all if I could jest replace the seals between the oil cooler and the fuel cooler.








  
Post #22157167th Mar 2021 9:32 am
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Flack
 


Member Since: 06 Sep 2006
Location: Preston Lancashire
Posts: 6233

England 2007 Discovery 3 TDV6 XS Auto Stornoway GreyDiscovery 3

Check the top hose connection,its a plastic housing that the top hose connects too. It might be split, its a known fault,its right next to and just above that area.

Flack Thumbs Up  
Post #22157207th Mar 2021 10:05 am
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cpilkinton
 


Member Since: 07 Mar 2021
Location: Auckland
Posts: 3

New Zealand 2006 Discovery 3 TDV6 HSE Auto Barolo BlackDiscovery 3

Thanks for your insight Flack! I have already checked this part unfortunately. It was manufactured in 2016 so must have been replaced by the previous owner. Still in good condition. While it was removed for inspection I also replaced the 3 O rings.

From where the coolant is pooling it seems to me like its seeping through the gap between the fuel cooler and oil cooler. I know it's sold as one piece but has anyone separated the two units before?  
Post #22157257th Mar 2021 10:30 am
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