peugeot 306 1.9td

[Tom]

Big radiator thing on the top of the engine is your intercooler. Check all pipes going to and from that. If you dont get that then take it to a garage.

Cant be any simpler than that.... could be a crack or split of a hole in the pipe, you could get lucky and its a knackered jubilee clip or d seal..... a picture of your engine bay wouldnt go amiss just so people can see what we're working with