Oil in Coolant?

Hannya92 · Unread post by **Hannya92** » 12 Dec 2025, 18:57

Thanks very much

Unread post by **xantia_v6** » 12 Dec 2025, 19:03

To explain the confusion a little: PSA don't list the oil cooler as a separate part, they sell the whole assembly of the filter base with the cooler attached.

Unread post by **mickthemaverick** » 12 Dec 2025, 19:05

Aah!! thanks for that Mike, it explains my inability to find it!!

Gibbo2286 · Unread post by **Gibbo2286** » 13 Dec 2025, 11:02

New and used on ebay
https://www.ebay.co.uk/itm/397259072031 ... 7fdaedb114

Stickyfinger · Unread post by **Stickyfinger** » 13 Dec 2025, 13:49

No12

~
https://catalogs.ssg.asia/citroen/?lang ... aWVyPT0%3D

Unread post by **Mihael_M** » 13 Dec 2025, 17:52

Gibbo2286 wrote: 13 Dec 2025, 11:02 New and used on ebay
https://www.ebay.co.uk/itm/397259072031 ... 7fdaedb114

It is a radiator for a gasoline THP engine. It does not fit the 2.0 Hdi.

The corresponding is Nr. 1103T3.

Stickyfinger · Unread post by **Stickyfinger** » 13 Dec 2025, 19:48

Also fitted to Ford Transits.....lots about for about £45-£75

Unread post by **Mihael_M** » 13 Dec 2025, 22:13

https://www.autodoc.co.uk/car-parts/oil ... 09-2-0-hdi
At Autodoc it is £24.99 new .

Hannya92 · Unread post by **Hannya92** » 14 Dec 2025, 11:33

Thanks everyone, I'm not too sure how long this is like that but would this have harmed the engine much?

Like I said, for now car runs fine, maybe a bit underpowered but I'm used to petrol engines

Unread post by **mickthemaverick** » 14 Dec 2025, 11:37

As the engine oil does not appear to be contaminated you may well be ok. I'd advise a full drain, flush and refill of the cooling system once you have fitted the new part and hopefully it will be OK

Hannya92 · Unread post by **Hannya92** » 14 Dec 2025, 16:23

Hopefully it's that... I'll be going to the me mechanic this week so I will update this post once I know more

Stickyfinger · Unread post by **Stickyfinger** » 15 Dec 2025, 08:23

I do hope you have STOPPED DRIVING the car at the moment ?

Gibbo2286 · Unread post by **Gibbo2286** » 15 Dec 2025, 12:17

If the passage of the water had been in the other direction i.e. water in the crankcase it would have destroyed the engine.

Hannya92 · Unread post by **Hannya92** » 16 Dec 2025, 19:40

I have stopped driving this car since I found the issue, I have the mechanic booked in for Thursday to replace the oil cooler and do a flush on the system, hopefully that resolved the issue

ekjdm14 · Unread post by **ekjdm14** » 17 Dec 2025, 18:02

Gibbo2286 wrote: 15 Dec 2025, 12:17 If the passage of the water had been in the other direction i.e. water in the crankcase it would have destroyed the engine.

Yes, and even if it does appear to simply be oil-into-coolant one way I'd still recommend an oil/filter change as a precaution. Doesn't take a lot of antifreeze to "poison" the bottom end, a lot cheaper to drop & replace the stuff just for peace of mind especially as the oil filter has to come off to replace the cooler anyhow

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