how much

[Nkerridge]

would anybody have any idea how it will cost to have my head gasket done
as it looks like its blown and replace the injectors, they have done around 40,000 miles

[Sancho]

About 500 quid at a guess

[Taliesins]

would anybody have any idea how it will cost to have my head gasket done
as it looks like its blown and replace the injectors, they have done around 40,000 miles

Why replace the injectors? 40 000 isn't a lot. Unless youve got a problem with them. If their OK leave well alone and save some brass.