Bit of improve, it'll fit behind the bumper.https://www.ebay.co.uk/itm/203578729484?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=tsnLQFN3T1-&sssrc=2349624&ssuid=HQkiUKOCSAq&var=&widget_ver=artemis&media=COPY
If push really comes to shove then possibly. But I once read from MTDM that the reason the oil cooler is immersed in the engine coolant, is not only to help cool the oil, but also to help get the coolant up to temperature quicker.
I’d like to stay original, if at all possible.
I’ve just purchased a known good stainless cooler from an Omega enthusiast who can vouch that it’s had a good coolant mix all of its life, and came out in one piece. So that’s an option.
I’ve also found a product on eBay labelled “Opel Omega Engine Oil Cooler Radiator” and both the X25XE and X30XE from 1994 to 1999 are listed as compatible. This would fit a later V6, and I wonder if it’s new-old-stock. The seller seems to only do model specific oil coolers.
I thought for £40, I’ll take a punt and see what arrives! I can always keep the known-good used one as a spare!