There is no belt tensioner pulley. Crank,waterpump, alternator and ac. Wouldn't hurt to pull the belt off and run it. See if the noise is gone. If it is then spin each pulley and hopefully narrow it down from there. If the noise is still there then it's internal. Not sure why I didn't think of that by now.
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View my fuel log 2014 Mirage SE wussie cvt edition. 1.2 automatic: 37.7 mpg (US) ... 16.0 km/L ... 6.2 L/100 km ... 45.3 mpg (Imp)
Dirk Diggler (08-15-2019),Loren (08-14-2019)
Fummins (08-14-2019)
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View my fuel log 2015 Mirage ES 1.2 manual: 52.2 mpg (US) ... 22.2 km/L ... 4.5 L/100 km ... 62.6 mpg (Imp)
I experienced this same noise briefly and much quiter. It didnt have that start up roar like the vid. But I could hear it whirring just like that for about 2 minutes while cruising around 40mph.