Hi Rob,

I'm afraid I went a bit OTT and bought the entire pipe units for both leaks, but just replaced the top pipe O rings as the leaks were at the top of the engine and I didn't want to have to go deeper to disconnect the bottom ones.

The leaky O ring to the oil cooler I think also is on the pipe that also cools the EGR. Part number LR022718. I just bought the part then took its O ring out so I didn't have to disconnect the existing one.

This is the offending pipe, and the O ring inside was completely perished, so disconnecting it to do the oil cooler must have finally screwed it. I tried to find the O ring size and type but wasn't sure what it was made of and its exact size. £25 for the whole pipe assembly:

Click image to enlarge

Thanks!
I've sent in a cheeky offer
https://www.ebay.co.uk/itm/PRO-Radiator-Co...23a5a44ec1

EGR pipe for reference
https://www.island-4x4.co.uk/hose-genuine-lr022718-p-38391.html Gone to a good home: 2011 4.4 TDV8 Vogue SE Buckingham Blue with Ivory and clear glass = "Rory"
2025MY Defender D350 90 in Silicon Silver on coils
1974 Series 3 Lightweight = "Millie"
Many, many other Landies over the years
My preferred specialist: www.glenrands.co.uk
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Matt
Do you lose a lot of coolant replacing the EGR O ring?
Rob Gone to a good home: 2011 4.4 TDV8 Vogue SE Buckingham Blue with Ivory and clear glass = "Rory"
2025MY Defender D350 90 in Silicon Silver on coils
1974 Series 3 Lightweight = "Millie"
Many, many other Landies over the years
My preferred specialist: www.glenrands.co.uk
--------------------------------------------------

Hi Rob. No didn’t lose much. I did it when I changed the oil cooler (I replaced the whole unit) and, on triumphant and lovingly cleaned assembly of the new oil cooler and decoked manifold, I then spotted coolant leaking below. I soon spotted the leak so had to remove all the gubbins again to get to it. I don’t know if it was leaking before but disconnecting and reconnecting it obviously loosened up the seal and I found the O ring looking rotten so replaced. No big gush of coolant when disconnecting from memory as near the top of the engine. Good luck!

Could someone explain what and where the EGR cooler is please. I can’t find and reference to it in the manual. Thanks

sits on top of the 'V' (rear) under the intake that we tend to call the 'donut'.

Number 10 on the drawing

10 & 11 is the EGR valve, with 10 probably the actuator. The cooler comprises of 13 and 15, with 13 located inside 15. 2 is the oil filter and cooler which sits atop the EGR cooler.

Thanks, I did the oil cooler gaskets myself, but didn’t really realise what was under it. More potential trouble by the looks

Rodjules wrote:

Thank you all for your advice and comments. Confirming my thoughts that I hadn’t seen anything on the forum regarding HG on the 4.4. I went into the MD and spoke to the senior technician who is now on the car and pointed him towards the oil cooler gaskets. Will wait and see what they report back but think I will get a second opinion before authorising HG replacement. To be fair I have used this MD for many years and they have always been very good. Will keep you all in the loop on how I get on

Yep had them both changed as O rings were perished when checked and all appears well, although to be fair have done very limited mileage since. (Combination of COVID & working overseas). 2015 L405 Range Rover 4.4Sdv8 Vogue SE, Baltic Blue, Ivory
2012 L322 Range Rover 4.4 Westminster Baltic Blue, Ivory - Deceased
2012 Discovery 4 HSE 3.0 Sdv6 Oslo Grey, Black - Gone
2006 L322 Range Rover Td6 Vogue SE Buckingham Blue, Parchment - Gone
1996 P38 Range Rover 4.6 HSE Rioja Red, Black - Gone
1990 Landrover 110 2.5TD CSW - Why Oh Why ???

Mine turned out to be a small leak from the EGR cooler which sits below the Oil Cooler in the V.
A small amount of red crystalline residue was seen sitting on the block in the V once the inlet "donut" was removed.
All stripped out, inspected, cleaned and new EGR gaskets fitted. Gone to a good home: 2011 4.4 TDV8 Vogue SE Buckingham Blue with Ivory and clear glass = "Rory"
2025MY Defender D350 90 in Silicon Silver on coils
1974 Series 3 Lightweight = "Millie"
Many, many other Landies over the years
My preferred specialist: www.glenrands.co.uk
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Last edited by DrRob on 15th Feb 2022 7:22am. Edited 1 time in total

I'm loosing a small amount of coolant and will have to get this checked out. Not sure if it' easier to just keep topping it up...... 2012 TDV8 Vogue (L322)

Pics to follow..... Gone to a good home: 2011 4.4 TDV8 Vogue SE Buckingham Blue with Ivory and clear glass = "Rory"
2025MY Defender D350 90 in Silicon Silver on coils
1974 Series 3 Lightweight = "Millie"
Many, many other Landies over the years
My preferred specialist: www.glenrands.co.uk
--------------------------------------------------

Last edited by DrRob on 15th Feb 2022 7:21am. Edited 1 time in total

Red stuff visible

Click image to enlarge

Click image to enlarge