A quick way to tell if a belt is slipping is to spray or pour a little water onto it while the engine is running; I’m not talking about a lot, maybe a cup full at most. If the noise stops, then the belt is at fault; if not, then it is bearing related.
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2018 V90CC D4, 2022 XC40
1940 Matchless G3, 1980 Moto Guzzi T3
Coming soon:- 1947Rover 14 P2
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