My 94 corolla with 105 K miles on the clock developed a tapping/clicking sound; which to me in my ignorance sounded like a tappet or small end.
So it's round to our local ' Mr Whiz', who listens, listens more, revs up and listens some more.
Then he whips out the WD-40, sprays it at the alternator.... Noise gone, smiles all round, and off I go.
Perhaps someone might educate a novice about my preconceptions. I would have thought that spraying a liquid on to a working alternator might create problems with it going inside and shorting something? Also to the extent that WD-40 does have some lubricating properties (albeit for a short time) might that not have caused the driving belt to start slipping and playing up?