My sig was pretty much perfect before turbo went, after about 5 weeks of not having it with the trouble for one silly bolt, i got the bolt put it in the new turbo and car started with a jump lol. I turned that daft screw for bleeding the cooling system so i could take it to a friends garage where i serviced the car, All filters, GM oil and anti freeze. And its been a nightmare as had a slight oil leek and the bleed screw wont reseal so temperature went up and down like a yoyo. I have had to tightin the bolts more so i hope oil leak is fixed but i get the feeling i am going to have to take turbo of to start again and get a new cooling hose also. Might take it to vauxhall and get them to do the antifreeze for me so i know car is bled properly.