Originally Posted by ghettosled
i heard horrific things about after market UD pulleys as well. the extra weight is used to balance and steady the crank shaft. without the weight, then the bearings take much more stress and fail prematurely.
theoretically yes, but to what degree does this affect the bearings?
i had a friend with a nissan maxima, he had a chinese-made crank pulley with crappy quality... it has been two years now since he got it and nothing's wrong...
even if the bearings life span is reduced by, lets say, 30%, it's not that bad, you get something around 13whp from these things, that's alotta power for $200 at most.