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ARC99

Member Since: 19 Feb 2013
Location: North Yorkshire
Posts: 1831

2008 Defender 110 Puma 2.4 USW Cairns Blue

Water leak from engine oil cooler.

Noticed this morning that I have a pool of coolant under the vehicle.
After pulling myself under the engine I can see a stead drip of water coming from the engine oil cooler which is above the oil filter. From the workshop manual it appears that the joint the water is dripping from is a bolt on spigot for the hose, the part catalogue does not appear to list a joint of o ring as a seal.

Unfortunately my Indy is not available to fix it.

Has anyone had this problem or can help as to how it can be repaired? Don't make old people mad.
We don't like being old in the first place,
so it doesn't take much to

us off.

Richard

20th Mar 2019 9:20am

Phil VM2.5

Member Since: 28 Mar 2012
Location: Limelette
Posts: 196

2012 Defender 110 Puma 2.2 SW Keswick Green

Hi,
I did have oil going in cooler system.
I did not try to repare the oil cooler and replace it with a Ford part , oil filter is different.
Philippe current : defender 110 sw 2.2 puma 2012 and 230.000km today and
again my Range Rover VM2.5 engine from 1992 and 528.000km today.

One ten 1988 to 1992
1987 BMW GS80
One Ten from 1984 to 1987
One Ten from 1983 to 1984
Serie 3 109 from 1980 to 1983
from 1974 Jeep CJ3B and CJ6

21st Mar 2019 5:58am

ARC99

Member Since: 19 Feb 2013
Location: North Yorkshire
Posts: 1831

How like Land Rover.

After finding someone who has the knowledge and the willingness to work on a Land Rover S.H.M.B.O. dropped it off this morning. Called after 2.00pm and they have inspected it at first the could not see a leak until the receptionist told the mechanic that our drive is on a slope, he lifted the rear end and hey presto Niagara falls, he agreed that its a seal that has gone which should cost at the most a couple of quid only problem is the seal is not a replaceable item that either land rover of Ford list and its a special size , the only way to replace the seal is to but the whole unit which is more £££'s

Don't make old people mad.
We don't like being old in the first place,
so it doesn't take much to

us off.

Richard

25th Mar 2019 8:53pm

ARC99

Member Since: 19 Feb 2013
Location: North Yorkshire
Posts: 1831

Another learning day.

If anyone is interested.

The engine oil cooler which is mounted on top of the oil filter, has a thermostat fitted to the water side and one on the oil side . The one on the water side is bolted to the oil filter, assembly, has a rubber O ring seal and comes off at an angle.

The rubber O ring on mine failed and was leaking about 2 Gallon of water per day, having now got the failed part home and had a good look at it its a wonder that it ever sealed in the first place. Don't make old people mad.
We don't like being old in the first place,
so it doesn't take much to

us off.

Richard

26th Mar 2019 6:16pm

R1200GS

Member Since: 12 Jul 2015
Location: Hampshire
Posts: 265

2016 Defender 90 Puma 2.2 XS CSW Keswick Green

Thanks for posting this, how old is your TDCI and whats the milage? Never seen this issue posted before so maybe
you have just been unlucky ?

26th Mar 2019 6:25pm

ARC99

Member Since: 19 Feb 2013
Location: North Yorkshire
Posts: 1831

Vehicle was first reg in 2008 and its done approx. 85,000 miles. Don't make old people mad.
We don't like being old in the first place,
so it doesn't take much to

us off.

Richard

27th Mar 2019 9:02am

Liam Murphy

Member Since: 29 Jul 2020
Location: South Wales
Posts: 95

ARC99 wrote:
Another learning day.

If anyone is interested.

The engine oil cooler which is mounted on top of the oil filter, has a thermostat fitted to the water side and one on the oil side . The one on the water side is bolted to the oil filter, assembly, has a rubber O ring seal and comes off at an angle.

The rubber O ring on mine failed and was leaking about 2 Gallon of water per day, having now got the failed part home and had a good look at it its a wonder that it ever sealed in the first place.

26th Aug 2020 2:35pm

jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 8171

2011 Defender 110 Puma 2.4 USW Stornoway Grey

My 2011 130 has had replacement cooler fitted for this reason, came with it like that when I purchased. Interestingly the replacement cooler is later type so mine now takes later spin on filter not earlier insert type. Cheers

James
110 2010 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop

26th Aug 2020 3:18pm

Tumbiri

Member Since: 01 Nov 2016
Location: Caribbean
Posts: 52

2013 Defender 110 Puma 2.2 XS CSW Orkney Grey

quote="Liam Murphy"]

ARC99 wrote:
Another learning day.

If anyone is interested.

The engine oil cooler which is mounted on top of the oil filter, has a thermostat fitted to the water side and one on the oil side . The one on the water side is bolted to the oil filter, assembly, has a rubber O ring seal and comes off at an angle.

The rubber O ring on mine failed and was leaking about 2 Gallon of water per day, having now got the failed part home and had a good look at it its a wonder that it ever sealed in the first place.

Yes, I'm interested!

Mine has developed the same problem, a day after getting it back from having the clutch replaced.

Can you remember what the replacement rubber o ring part number / brand was by any chance?

Cheers![/quote

Liam, mine has just developed a coolant leak at the oil cooler thermostat (62K Km). Were you able to replace the O-ring on your thermostat and if so, do you have a part number? Cheers.

14th Sep 2020 12:48am

Liam Murphy

Member Since: 29 Jul 2020
Location: South Wales
Posts: 95

I changed the thermostat itself, it's only £16.99 for the unit

Part and number is: OEM Oil Cooler Thermostat For Land Rover Defender 2.4 TDCI Puma - LR005894G

https://www.ebay.co.uk/itm/OEM-Oil-Cooler-...SwLy1d61yH

14th Sep 2020 7:29am

ARC99

Member Since: 19 Feb 2013
Location: North Yorkshire
Posts: 1831

Tumbiri wrote:
quote="Liam Murphy"]
ARC99 wrote:
Another learning day.

If anyone is interested.

The engine oil cooler which is mounted on top of the oil filter, has a thermostat fitted to the water side and one on the oil side . The one on the water side is bolted to the oil filter, assembly, has a rubber O ring seal and comes off at an angle.

The rubber O ring on mine failed and was leaking about 2 Gallon of water per day, having now got the failed part home and had a good look at it its a wonder that it ever sealed in the first place.

Yes, I'm interested!

Mine has developed the same problem, a day after getting it back from having the clutch replaced.

Can you remember what the replacement rubber o ring part number / brand was by any chance?

Cheers![/quote

Liam, mine has just developed a coolant leak at the oil cooler thermostat (62K Km). Were you able to replace the O-ring on your thermostat and if so, do you have a part number? Cheers.

It was done by a garage, I will have to have a look through the paperwork to see if they put the part number on. Don't make old people mad.
We don't like being old in the first place,
so it doesn't take much to

us off.

Richard

14th Sep 2020 7:45am

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