Originally Posted by
onehundred80
Some of the pulleys have a black finish, I think these are aluminum pulleys and they tend to split in half.
They never seem to say what the pulley material is.
The weak parts of these pulleys are the springs and the riveting of the springs in the aluminum ones..
This is why I made the decision to purchase OEM pulley/clutch units made of stainless steel. I have had the experience of an aluminum aftermarket pulley splitting. It was on the car when I obtained it, and I was unaware that it had been previously changed. The 2 pulleys that I purchased, from what I am told, have their origins in the UK from Fiat. I should be ordering gaskets from Rob when it arrives.