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#21
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From your description, the thing that seemed most odd was the high voltage - 15+ Volts. And that would suggest a failed VR. The Valeo alternator on my M54 has the brushes included in the VR, so when my brushes wore out, I replaced the VR to successfully fix it. Later rebuilt everything including slip rings, when I had the engine apart. There is a trick I used to get the brushes on during reassembly, but I don't know if it would apply to your 4.4i alternator, which may be very different. Can you send a pic of the brushes assembly, looking back at where the brushes leave the VR?
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2001 X5 3.0i, 203k miles, AT, owned since 2014 |
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#22
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I replaced my brushes. I may have pulled in the braided wire before soldering them in. I forget
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2011 E70 • N55 (me) 2012 E70 • N63 (wife) |
#23
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Quote:
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Main Autos: 1990 BMW 525i 2004 BMW X5 4.4i 2011 Toyota Tacoma Pre-Runner V6 |
#24
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Yep exactly my suggestion.
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2011 E70 • N55 (me) 2012 E70 • N63 (wife) |
#25
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Quote:
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Main Autos: 1990 BMW 525i 2004 BMW X5 4.4i 2011 Toyota Tacoma Pre-Runner V6 |
#26
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The puzzle shape implies the cylinder cap pulls off the center. That would make it stupid simple to address the brush install issue.
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2011 E70 • N55 (me) 2012 E70 • N63 (wife) |
#27
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Yeah it would be super simple to install the cap back on if I were to break the plastic pieces that "guard" the brushes, but I want to try to find another way without doing that.
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Main Autos: 1990 BMW 525i 2004 BMW X5 4.4i 2011 Toyota Tacoma Pre-Runner V6 |
#28
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With the cap off (by pushing the bushes deep enough to clear the holes) you will have access to the brushes to push them back in to get the cap back on.
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2011 E70 • N55 (me) 2012 E70 • N63 (wife) |
#29
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Sorry I'm not too clear on what's going on here, but ...
For example, is that the old VR with the severely cracked off top, and you're installing a completely new one, just photo'ing that one for convenience? On the idea to drill a hole through the top, use a paperclip to hold the brushes in, then reseal the hole when done ... yes, that's great. If you ARE talking about using that broken-top VR, then obviously no need to drill a hole; and probably something to cover / fix the hole in the shield would be good. On different brush holder designs, I've found that a simple small zip tie can hold the brushes retracted while installing over the slip rings, and then the zip tie can pull out easily. I expect when installed in a factory, they use some special purpose implementation of this idea - similar for example to the little plastic pull tabs that electronic devices often have to make sure the battery is not connected prior to its unpackaging and first use. With your design, that may be tougher or less possible than the alternatives. The trick I used on my Valeo 120A on my 3.0i looks like it should apply to yours, so here it is: The yellow arrow from AndrewWynn's pic shows where the plastic cylindrical shell attaches. Clear how it might slide, but in my case it was NOT possible to simply slide it off while installing. And if it were possible to carefully get past the locking barbs and get it off, you would not be able to reinstall it once the brushes were installed and touching the slip rings, since the brushes go through the rectangular openings in it. But it did have enough free play in it to shift it up slightly. So I slid it as far as it would go in that direction (aligned with the rotor axis) to the point where the brushes could be one-at-a-time pressed back with a screwdriver and tucked under that plastic edge, holding them from popping out. I needed to keep constant pressure on the plastic shell in this position, displacing it by a mm or two, otherwise it would just shift back and the two spring loaded brushes would pop out. But after just a little trial and error, keeping pressure on it, I could slip it over the slip rings, then let the plastic shield return to its rest state, letting the brushes pop into position against the slip rings.
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2001 X5 3.0i, 203k miles, AT, owned since 2014 |
#30
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Thanks!
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Main Autos: 1990 BMW 525i 2004 BMW X5 4.4i 2011 Toyota Tacoma Pre-Runner V6 |
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