firstly you will have to determine what is seized,it may mean removing sump and big end/main bearing caps for a look,no matter what, you are in for a major job to repair and it may be in your interest to source a 2nd hand engine to save time and money
cdc
October 2011
Get a replacement from a breakers and a haynes type of manual for instructions on how to do it
nigel
October 2011
I can answer this question...
how can i fix a peugeot 406 2 litre 16v with a ceased engine?