They have a fully floating crank pulley on these I think.
i.e no woodruff key,

Without the spacial crank pin, its a definate no no.
They have a phase shifter cam pulley too, which needs to be positioned correctly.

Can be done in situ, remove the head light for more room!!
I would definately take it to a renault spot though.

Service interval for aux belt is 36,000 on the 172 and 182
compared to 72,000 on other clios