I've just discovered oil in my coolant expansion tank and an oily / watery leak dripping onto the undertray. I'm assuming the oil cooler is leaking oil into the coolant and requires replacing, together with coolant flushing

Car has 95k miles and runs ok, although guessing its a bad idea to keep running it with this issue!

Has anyone tackled this as a DIY and / or have the workshop pdf available?

Thanks

Last edited by JCW on 19th Aug 2018 5:34pm. Edited 1 time in total

GraemeS has just done his:
http://www.fullfatrr.com/forum/topic45147.html

Could be gasket or cracked housing.

There are many threads on the subject.

Good luck! . Cheers, Greg
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2011 Vogue SE 4.4 with lots of toys in Stornaway

Read through that post -with luck it may just be the gasket or gaskets - the parts diagram only appears to show one, part LR022903 but that doesn't look like the one if you were to split the cooler itself and replace.

Looks like I could do with a copy of LTB00785v2 does anyone have access to a copy please?

...re-reading Graeme S's post suggests there are two gaskets of the same type, I need to dismantle in anycase so I'll just crack on.

Not sure where you can get TSB's but have a look on the Microcat for the parts and really good exploded diagrams. In the Wiki.
. Cheers, Greg
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2011 Vogue SE 4.4 with lots of toys in Stornaway

Also:

http://www.fullfatrr.com/forum/topic48343.html .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

Thanks Joe90, mines a 4.4 tdv8 rather than a 3.6 but imagine if there is an 'internal' gasket in the cooler itself it'll be in both versions - nothing shown on microcat, assumedly LR want you to but a whole new cooler opposed replacing a gasket

There is a comprehensive thread on the oil cooler problem and the parts needed and process for replacement: http://www.fullfatrr.com/forum/topic35977.html

Mike

Thanks Mike, I'd not got past page 6 on that thread and assumed it was only relating to the o rings, now reading on it provides useful info on the cooler too, including the two gasket part no's. I'll take this job on over the next few days and report back.

Any suggestions on a coolant flush and best method to remove the oil from the contaminated cooling system?

Mine was flushed 4 or 5 times by the garage. 2011 Range Rover Vogue SE 4.4 TDV8

Previous cars :
2003 Range Rover Vogue TD6
1999 Discovery Td5 ES
1995 BMW M5 3.8 6 speed
1992 Range Rover 3.9 Efi Vogue
1992 BMW M5 3.8
1988 BMW 735i SE
1989 Ford Sierra XR4x4 2.9i
1981 Ford Fiesta Supersport

depends how much oil contamination you have....my oil cooler was replaced by the dealer under warranty and i had a small amount of oil in the coolant expansion tank which the dealer said would burn off and it did after a few long runs.. ... - .- -.




Y. O. L. O.
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There's a good layer of oil on the surface in the expansion tank & colour of the coolant looks brown, bought a few bottles of this to hopefully flush it through clean

https://www.wynns.eu/product/extreme-cooling-system-degreaser/

gonna_go_double_r wrote:

Not sure where you can get TSB's but have a look on the Microcat for the parts and really good exploded diagrams. In the Wiki.
.

To remove the oil from the coolant was a regular dip of the wife's cotton face pads........the oil stuck to them but the coolant drained out.

There was another technique of dipping a bent coat hanger into the oil then slowly withdrawing it with the oil stuck to it.

It might be better to flush the system and replace/clean the header tank since it has a number of chambers that are hard to reach.

Mike

I think mines sufficiently contaminated that a full flush or two (or three!) is required.

Removed & split the oil cooler this morning and as suspected, the two rubber gaskets are both hard & brittle, especially the internal one that seals the cooler itself to the main body of the oil filter housing.

The plastic intake manifold / rubber sleeves are totally gunked up with thick oily deposits, so a side job to try & thoroughy clean that all out too. The two intake sensors also completely gunked up, surprised no error msgs were being displayed.