ooops, and need advice.
 

I let my s12 get dangerously low on oil the other day :( totally my fault i know, but there must be a prob for it to be that low!!!!! so i filled it up, now when cold it starts with a bit of blue smoke, as i pull away and boost kicks in, i got some more blue smoke, but clears, once warm the smoke isnt really noticable, BUT you can smell it coming out of the exhaust, so i gather its burning the oil rather than leaking, now ive had both the turbo seals & the valve stem seal go before so i have some idea what to look out for, but this is strange, coz valve seals mainly smoke on hot startup, and very little on cold startup, but turbo seals normally smoke on deacceleration, which it isnt (yet) anyone have any ideas if this is early stages to either the rings, turbo or valve stem seals going tits up, bearing in mind i did the valve stem seals 2 years ago with genuine nissan ones, could it be one slipped off?? the turbo is a T2 hybrid with 360 deg bearing running aprox 10 - 11 psi boost, this was last reconditioned in 2001.

next question is..... does anyone have the parts laying about to bolt a T25, T28 straight on, as money is really short and i cant do another £400 for a turbo just yet, and if i do its gotta be worth it (i.e a bigger one T25, T28 )

Cheers.
Jamie

i had the same problem with my last s12 , i put a hybrid on it in the end aswell as doing the cam belt front and rear cam and crankshaft seals and clutch all at the same time, infact i've still got the hybrid turbo in the loft , its done less than 2000 miles and was run on synthetic only, adjustable wastegate actuator too if you're interested make me an offer:)

What turbo is it?

t2 hybrid by turbo technics 360 degree thrust bearing and all that it wasn't cheap either , i had it set by them to run at 14 psi

Am i right in thinking that the T2,T25 and T28 share the same type of bearing? i.e there interchangeable?

as far as i know yeah

i wonder if its to do with when i took out the metal pipe supply to the turbo, i have the mk1 engine with the long pipe, this broke at the join at the back of the engine, i replaced this with a length of braided hose, i wonder if the join at the back of the engine was a restrictor of some type??? other than that i havnt seen a restrictor in the line when i had it off, could this cause the prob????

The thrust bearing i mean? soz

thats what i mean't :)

Cool surely a thrust bearings a thrust bearing, The reason i ask this is because i have a couple of hybrid T2s and as im building the T25 up i wonder if its worth using the 360` bearing from the T2? Suppose it depends how worn to the thrust collar it is:ghey