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1987 924S Drive belts

Engine

Vehicle Information: Model(924/944/968): 924S; Year: 1987; Body Type: Coupe; Total Mileage: 117xxx;

Can you tell me how loose the Balance Shaft Belt appears when at rest and properly tensioned? Mine is loose enough to slide back/forth on the roller. And can move it up/down near the 5mm space at the idler pulley apprx 1/2". I want to know what the drive belts look and feel like when the proper tension for a pre-belt/roller change as a reference. This is so I can tell if I errored or not by comparing. Also the belts have 3000 mi left before the recommened change and look brand new still. Is there any concern or can I use them longer due to the condition as is?The cam belt just barely touches the water pump pulley at rest and I can spin it by hand but if I put just a bit of pressure on the cam belt the pulley will not spin by hand. Is this normal also? I am assuming the belt tightens up a bit when running creating the needed pressure to spin the water pump?

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