С натяжкой все норм,как написано в паспорте не более 5 мм !
проверить посадочное место ролика, может быть погрызло когда то, внутренний подшипник ролика в порядке ?
Как мне показалось,это слабое место в рапторе.У меня была такая же проблема.Особенно проявляется в холодное время и при резких перепадах температур.Например из теплой машины на улицу.Ремень ослабевает и начинает жрать и себя и ролик натяжной.Решение одно-постоянно следить за натяжкой ремня.Ну и менять по мере необходимости ремень и ролик.Записать их в расходники если можно так выразится.
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