Renault Scenic Tdci auxilliary belt

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Mon 9 Jan 2006 11:47
Renault Scenic Tdci auxilliary belt - Spanner
Anyone out there tried to change the auxilliary (serpentine) belt on an '02 Scenic dci with air-con.
A friend had a garage fit the above belt which a few days later decided to throw itself off the pulleys. Upon looking, it appears the belt was fitted one ridge misaligned over the pulley flange/tensioner as one rib had seperated from the belt and then caused the whole belt to jump and wind itself around the crank pulley - all this at motorway speeds. Luckily it didn't damage cambelt covers otherwise he would have been looking at a snapped cambelt.
Anyway, a new belt has been sourced but I have just one question. How does one compress the belt tensioner as there is no 'wind back' mechanism. It's just a shaft with a very strong spring and a hollow jockey wheel at the end and two mounting bolts at the other?
I am sure that new tensioners are supplied pre-compressed with a strap but what if the belt needs to be removed to make way for any other engine repair?

Andrew
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