Thanks for the replies but turbo blown in Belgium, oil all over place on n/s of engine bay were i removed inter cooler pipe.Waiting for recovery to UK good job got warrenty on it.
Path of air is into air filter, across engine in rigid plastic pipe, into turbo, out of turbo through a selection of metal and rubber pipes to intercooler, out of intercooler through more rubber pipes to manifold. If the engine is trying to suck in air, a restriction at any point can cause the pipes to collapse. A turbo running in a vacuum does nothing