Quote: The abovementioned Mercedes timing chain is double roller and there were grooves that didn't look as ragged as the pictures. After around 90K miles everything was quite smooth and it sure looked like the wear had stopped or slowed way down. As I had already bought the new banana rail I installed it, but wouldn't have had to. There was still quite a thickness of plastic under the grooves. One other thing, wear probably slows down when the chain has worn in a little and there isn't quite so much pressure on the tensioner. But I'm sure the "silent chain" would wear a lot less on the plastic. R.
The silent chain has alot more surface area that rides on the plastic so its much slower on wear... even in the early days on it... the double roller slows right up on wear as soon as the rollers start to ride on the plastic(more surface area)
