Hi, thanks for the reply
when you say seal do you mean like a washer ?

No, I do not think so, in fact I am almost 100 % certain there was no seal.

I am at my absolute tether with it now, really am.

if I decide to go down the route of removing the EGR manifold will that give me the access to get a turn on this nut ? how difficult would this be to remove the egr which also means removing turbo and exhaust manifold ?

thanks