don't drive it with an oil cooler leaking, its a bitch to get that oil flushed out of the coolant system 
Probably to late I am afraid, the coolant bottle is very brown, the coolant looks awful.
The possible saving grace is I have plenty of free Vauxhall anti freeze to play with/flush it.
Don't waste anti-freeze on it (even if it is free!) it will need to be flushed at least 20 times, water should do it. There are various methods for aiding in breaking the oil down, from dish washer powder to bleach, but use in tiny amounts! 
Fair enough, we don't have a dishwasher but any idea how much to use per flush.
Thanks
Simular problem for me last week.
I tried Bold / Aireal / Daz etc in the header tank, (after I had removed it), but it failed to shift much of the muck. The problem with the header tank is that it is split into three compartments, and you can only get a brush into one of them.
In the end I got a new header tank from VX (£26) and a bottle of Wynns coolant flush. That Wynns stuff is pretty good. Took five flushes with fresh water and there was still some of it in the system.
As for the oil cooler / gaskets / nuts / sealant etc, I got all of those from VX for around £150 for everything.
Not that bad a job to do. The worst bits are spending ages flushing your coolant system and ages cleaning the mating surfaces for the black plastic intake flange.
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Topic: Oil cooler leaking (Read 770 times)