Alternator pulley sizes 172 ph1

[hostler]

I found out today that the aux belt tensioner slightly rubs my aux belt. A while ago I replaced the pulley on my alternator since the original plastic one that was one there broke. I replaced it with a metal one I found on here. Could it be possible that there's a slight size difference in the pulley which causes the tensioner to slightly be off and therefore rub? The part of the tensioner that rubs is the very bottom part of the spring. See pics in the topic below, mine looks exactly like that.

Slight rubbing of AUX belt

Hey, I've noticed a bit of rubbing between the tensioner spring and the aux belt. I was wondering what may have caused this and what I can do to keep them apart. Clio 172 53 plate. Here are some pictures, any help would be greatly appreciated.

cliosport.net

edit:

Some pictures

 

[hostler]

Sorry for the double post but I can't edit it anymore. I've found the below topic about running a 1670 belt instead of the standard 1660. But i'd first like to know if this issue is caused by the metal alternator pulley being bigger than the plastic one that was on there originally.

Aux belt and tensioner

Any one with practical experience of this would be magic Brand new aux belt and tensioner genuine parts fitted last week. What have I done wrong? Belt is routed correctly as far as I know Could the bolts on the spring be too tight? Thanks in adVance Benji

cliosport.net

 

[scullyg40]

Mine is about 51 mm on the outside of the ribs, I'll do a better measurement later tonight. Coincidentally I have the alternator off the car at the moment.

 

[hostler]

@scullyg40 Is yours the standard plastic one?

 

[scullyg40]

@scullyg40 Is yours the standard plastic one?

Never knew it was plastic, but it is yes.

 

[scullyg40]

And it is 51mm on the outsides of the ribs.

 

[hostler]

Ok yeah its definitely the pulley then. It's just slightly larger but i cant take a measurement in there since theres too little space in there. Going to put a longer belt on which should fix it. The belt is just too tight now.