All was well for a week then it started to creep back again, only when cold for a minute or so to start with but has now become a permanent screaming feature.

It seems the disturbance of taking it apart has caused enough stress to result in number one stud shearing.
Bongo's booked in again 2morrow to get it sorted, any techie heads know if I need to get yet another gasket or will the almost new one suffice?
Don't really want it to be done again in a fortnight but also want to be confident that all will be well so will get another one from Ian if ness.
