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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix. is the premier BMW Forum on the internet. Registered Users do not see the above ads.
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Old 11-08-2009, 02:45 AM   #1 (permalink)
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valeo alternator / inconsistant voltage

i have a valeo alternator in my e30 320i. On some drives it works fine but other times my all my lights strobe e.g voltage goes up and down up and down. Bad voltage regulator i suspect? belt is tight could anything else cause it is there a way to test it. I put a volt meter across the battery and the voltage is nt constant so i guess it is the regulator (12.5 - 15.5v) for memory not sure but it did reach 15 +.. volts
Reading around on the forums this is easy to change on the bosch alternator but i cant find info on how to change the voltage regulator in the valeo

or is it better to just replace the whole alternator? if so would a bosch alternator fit?
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Old 11-08-2009, 09:15 AM   #2 (permalink)
OMFG another one!?
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Some auto parts stores will do an electrical check for free. My first guess it the voltage regulator.

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