Alternator Overrun Pulley

[Hugh42732]

Hi All,

I have a 2009 Defender 130 and I have a slight whine in it if you are giving it a bit.

Mechanical advice says that the overrun pulley on the alternator isn't overrunning but it seems that we cannot just buy a pulley and have to purchase the whole alternator.

Has anyone else had this issue?

Was there a fix apart from replacing the alternator?

Thanks,

Hugh

[Graeme]

Replacement pulleys are available for some alternators but you might have to do some searching to find the part number for the one on your alternator.

As alternator over-running only occurs momentarily on sharp engine rev reduction, I wonder how the pulley can be blamed for whining at other times.