Auxiliary Belt Tensioner

[Ruan]

Doesn't have to be removed from the car, but dropping it off the left hand engine mount would probably make it significantly easier... Just put a jack under the sump, lift slightly, undo the bolts, grab the back of the engine, wiggle, and yank on the mount and it'll come free... You can then drop the engine forwards and down...

With regards to the stretchy belt, I think someone's pulling your leg... There's no such thing...