technically it is an idler. a tensioner pushes against the chain. imagine you were adjusting the rear wheel & slid it closer to the engine. a tensioner would continue to tension the chain while it would normally go slack.
it really shouldn't bother anybody if one term is used or the other except the semantic police.
Originally Posted by leadfarmer
Does anyone make an aftermarket tensioner/idler that works better than the stock one?
check the link i made earlier in the thread. it has a lot of good info if you want to use an idler.