List of problems with my saph cosworth

Pulls slowly and lumpily in low gears (not too bad once warmed up)
low oil pressure
loosing water
Turbo seems to get very hot

I think it might be my head gasket? Is it OK to drive until I get it repaired or will I do more damage? If it is a head gasket what kind of cost am I looking at for replacement? And finally if the head gasket is damaged / leaking is it likely to have done some damage to the engine also?

Would appreciate any advice by the on the above., thanks in advance

 

does it misfire when u have taken her out for a drive then left it over night and start it up in the morning?

white smoke when hot from exhaust?

low oil pressure sound bad tho!!!

 

No mis-fire, no smoke - but not running smoothly

 

Is there any water on the dipstick ?, it normally leaks above the rear most core plug drivers side of engine, and the gasket leaks water out of the water jacket into the area above the core plug, so of course will not show on the dipstick if here.
Low oil pressure, what oil are you using(don't say castrol!!) ?
tabetha

 

Hi Tabs - yeah I'm using Castrol GTX. I get the feeling you gonna say wrong oil?!

Just had a look - Little bit of water on top the dipstick, nothing on the filler cap.