tensioner

[fattypomba]

Hi all,
This is my first post here, and I’m sorry that it’s one that has been covered before.
I did a search and read heaps of posts, but didn’t fine what I was looking for.
I have a VT 6 cylinder, about 8 months ago I replaced the tensioner pulley and just for good measure a new serpentine belt. I brought the new aftermarket pulley from Sprint Autos. After I put the new pulley on I could see the belt doesn’t sit central on it. It sits more towards the front of the car.
I was a bit concerned about it but it worked fine until just the other day when it spat the belt.
I put the belt back on and all seems fine again.
My question is : If the tensioner looks fine and all other pullies look fine,, is it just this after market pulley is shit,, or is there something else going on here.
Thanks to all that reply

[thekid93]

normaly the hole tensioner pulley needs to be replaced not jst the pulley