Running in cosy engine at mo,just a bit concerned,when i start car from cold,no smoke,when blipping no smoke,if i leave car ticking over for 5 minutes or so,then give it a rev,a puff of blue smoke,clears straight away.no smoke when driving,or on overrun,only when left ticking over for a while.Any ideas,could the turbo be letting by,could the oil feed union be to big in top of turbo.Its a new turbo.The only thing that i did not change was the valves.I still have a crap mineral oil in at the mo.
Any ideas,thanks matt

 

what size should the hole be in the turbo union ?

 

Did you do new guides ?, it doesn't sound to bad if only whilst idling, if running a tad rich(bad) it will cause a little smoke esp running in, you are running it in properly, ie not babying it everywhere ?
If you suspect the turbo, look in the inlet pipes, should be nothing more than faint mist of oil in there if anything.
tabetha

 

just driving it as if were a non turbo car,but keeping off boost,did have new guides,but left the valves,i'm wondering if they were a bit to worn

 

Whoever did the headwork would presumably have told you if the valves were shagged.
Why you keeping off the boost, how many miles has it done, what oil you using ?
tabetha

 

was told not to boost,done 500 so far ,using a halfords own mineral oil.Is a well known cosy tuner i am dealing with at mo in romford.

 

A small amount of boost won't hurt, but more important, use plenty of revs, I am at full throttle by 500 for brief periods.
tabetha