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Hopefully Hodge will spot this thread as he has recently done this to his CRD. Its not really hard to do. The hardest part is mounting the can. You also need to make adaptors for the 1inch ports on the can to 1/2inch (from the engine) and 5/8inch (to the intake). How you adapt it, there is many ways. I used 1inch O.D to 5/8inch O.D copper adaptors from my local plumbers store. The inside diameter of the 5/8 end is 1/2inch, so I simply cut a short 1inch length of 1/2 copper tube , flared it and glued it inside the 5/8 end so then I had a 1inch O.D to 1/2inch O.D adaptor for the hose from the engine.
Hope this made sense. Kinda hard to explain.
If you need to locate the hose you need to tap into. Look for a hose that runs from the top of your motor and back to the air intake hose.