300E... Sick Alternator
I have a 1989 300E, and we're on to its third alternator. Is there a way of replacing the stock alternator with a high amperage unit?
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Are you sure it is a bad alternator and not the small voltage regulator attached to the unit on the back side?
Haasman |
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what brand are you using? |
Bosh has really bad alts. If I have to use a Bosh, I order 2 just in case. Make sure your batt. is ok though. An alternator will not charge a bad Batt.
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Bad bosch? speaking from a shop stand point where we replace several a year, during the past year we have only seen 2 bad bosch reman units, i think that is pretty good,
the one thing i think is bad is that they use used regulators, they do install new brushes, but the regulators have been the cause for the failures we have seen with the reman units. |
Yeah, bad bosh. The quality of bosh has gone down hill for the past eight years or so. The one that I took to my mom and pop's alt shop that I use for specialty needs, was a bad armature. Go figuar, huh.
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If your 300E has the stock 70A Bosch alternator, I would definitely upgrade it. I upgraded mine to the 80A Bosch AL66X alternator. It's not just the fact that it outputs an extra 10 amps, the 80A version is much more efficient at lower RPMs. I've posted info from one of my previous posts below - Quote:
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Bad alternator revisited
It was a Bosch rebuilt and it was installed with a new battery.
I like the idea of a heavier duty alternator. Of all the cars anc company vehicles I have owned this is the only one that I have replaced an alternator. Jim |
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