SR20 Oil in Coolant 2nd time round "searched"

[Rezlo]

Few weeks ago i was getting oil in my coolant and coming into the coolant overflow bottle, the head gasget had a slight leak due to the previous owner not having the head deck'd when he changed it.

So I went in and did a head job (valve cut, seals deck'd ectr) and put it all back together correctly, as true as hell now 500miles down the road its getting oil into the coolant again but it doesnt go into the oil pan at all, its like a one way leak which is why im so confuzed

Now there is only 2 ways I think this could be happening, either way it must be a tiny crack thats only letting the oil under high rpm (70-80psi) get threw but when its turned off it doesnt let the coolant back into the oil stream contaminating it as i have ZERO oil contamination.

A: the turbo is cracked and is letting a little bit of oil get into the coolant jacket inside the turbo
B: The oil cooler (under the filter) that has the 2 coolant lines in it is leaking.

Has anyone had a similar problem?

This is a EU spec 1997 S14 with the stock SR20det,

Any help would be great,

[Rezlo]

Also when you guys run aftermarket oil coolers do you disconect the coolant lines onto the stock oil cooler? or just leave it?

[Rezlo]

Problem found, turbo was servised and some how they cracked the water jacket. shaft has about 2mm up and down play which is semi normal for a BB turbo but it has 1.5mm of lateral play aswell which it should never have. some where along the line someone had something done to it as i can tell by somones ingravings on the compressor housing and they must have dammaged it trying to replace the bearings or somthing.

so if anyone else has a problem similar to mine with oil in the coolant you may want to check the turbo.

Now the hunt begins for a new turbo :-\ im thinking either GT28 or S15 T28