Trick of the week coming
take a look at how an oil filter strap works, then get an old drive belt wrap it around the balancer doubling back on itself & hook the loop you are left with around the ac compressor pulley
get the biggest breaker bar you can and do up the bolt.has to be about 350 nm so dont be shy with it. reverse the belt to undo the bolt.
i will do a pic to make it easier to understand.
if you get stuck just look at an oil filter strap ok, really easy.
Cheers Rob
crappy pic as promised.
this way to undo the bolt
wrap in the poopsite direction to do it up
Cheers Again Rob