Vehicle & Technical > Discovery

Alternator Help/Advice needed

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Range Rover Blues:
Yes if it's charging I'd check the wiring first too.  Mine does it occasionaly , I just ignore it :roll:

Blu:
Confused!!!, I have tested the alternator, and it is still giving a charge, however, under closer inspection, I dropped the belt off and twirled the shaft, And discovered that the alternator has sheared a bearing.
As I now have the alternator off, I will replace it, but I am confused as to why it is still giving a charge, but not enough to charge my battery.

Range Rover Blues:
It's quite possible that it's dropped one or 2 phases, that's why when you test an alternator you need to test it under load rather than just 'idling'

Alternators are rated at something like 13 volts under load, so when you see the figures of say 65 amps, that't the most it can deliver and still maintain the voltage, any more current and the voltage suffers (and the alternator gets very hot).

So you might get a reading of 14.3 at idle, until you switch on your lights.

If the alternator canhold 14 volts or thereabouts with the headlights, screen blower, heated screen etc switched on then it's ok.

Blu:
Thank you RRB for clearing that up, now onto the next issue, Water leaking from cylinder block, a 40p gasket in return for 5 Hours + work to get it off, then get it on.  :(

Range Rover Blues:
Simple answer, a bottle of bodge-in-a-can.  My mate sells 2 really good ones for cracks, not sure if it would be as good on a failing gasket.

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