I've asked on another forum without luck! Regarding Audi 80 1.8 1986, when engine is at normal running temperature I can hear a groaning metalic noise coming from the front of the engine but only when hot not when the engine is cold and if I rev the engine just a little bit the noise isn't there, so only when the engine is at idle. I have listened to the cambelt and alternator but doesn't seem to be coming from there. Thanks for any replies and help!