If I could tap into the Z knowledge again please.  1990 tt jdm auto, resto well underway and heading towards mot. Engine sounds well, idles nice and pulling well but I'm getting excessive white smoke or actually steam equally from both exhausts, smoke is from idle increasing with revs when cold and also warmed up,  including pure water dripping out (no coolant in it no smell, nearly fit to drink) It is using quite alot of coolant so it's definitely entering the system somewhere. I know the obvious is the head gasket but my feeling is its not as no other signs at all. My thinking is that it's getting in at exhaust side, my question is can the coolant to the turbos enter the turbo exhaust anyhow, corrosion internally etc   I did wonder if I've got the coolant and oil lines swapped but no sign of  water in the oil. Any help appreciated.

Thanks

it could be condensation in the exhaust that will take a good run to clear rather than idling, however if using coolant I'd check the cooling system, by pressure testing it and looking for any visible leaks 

Some ideas here..

 

Thanks guys, found a dripper which seems to be accounting for some/most of the coolant loss,  ran it for about an hour today on the drive but dont think it's clearing up much, but I'm still hopeful. Will try again tmrw and keep a closer eye on how much coolant it uses as don't want to face the prospect of another engine pull just yet. Good compression so still don't think its the head gasket but may be wrong.