Hi all, My previuos posting seeking help has now turned into a request for a replacement.Despite my all my best efforts it is proving impossible to relaese the housing from the studs or remove the studs. Hence does anyone have a housing for sale to fit an ali. head for a 1725 Series engine? I do have a brass one but this has a narrower water way than the ali.and I do not wish to use it in case of overheating. Whilst I am in France a part could be sent to a UK address. Regards John