Grinding/weird noise 94 Defender NAS - Defender Source
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  #1  
Old May 24th, 2012, 11:49 PM
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Chad Davis
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Grinding/weird noise 94 Defender NAS

So I took some video as I just wanted to get everyone on here's opinion on what's happening and what that grinding noise is. I've been told is a bearing in the alternator but that it's still working so no need to replace yet. From what I heard, it seems to be coming from the area of belts under the alternator and the power steering reservoir was low on fluid.

http://youtu.be/gFNX0FcmnPE
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  #2  
Old May 25th, 2012, 12:01 AM
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Hard to tell from watching the vid, but put a long handled screwdriver on the alt while it's running and use it like a stethoscope - put your to the end of the screwdriver and you should hear it grumbling if it's the alt.

If it is the alt, just suck it up and get a new one. $225 gets you a new one delivered to your door with wiring harness. Good guys, Jeff Huff turned me on to them...unit is a 140amp (vs I think stock is like 90amp):

http://www.actionalternator.com/p_home.asp
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Old May 25th, 2012, 12:09 AM
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check this video of me driving with the camera suction cupped to the hood. fast forward to about 2:30 for the driving section where I think it's most prominent.



Thanks again for the screwdriver suggestion, I'll try that tomorrow.
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Old May 25th, 2012, 12:16 AM
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Sure sounds like my alt before it was replaced...of course mine crapped out from this (for some reason they don't like mud + water )...mine is the white 90:
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Old May 25th, 2012, 12:19 AM
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You can also squirt some WD40 on the front/back of the alt bearings...if the sound goes away you know that's what it is. However, the WD40 is only a test...it'll burn off shortly and the grumble will return.

------ Follow up post added May 25th, 2012 12:26 AM ------

Totally just curious....but you've got the '84 ROW 90, but is the red NAS yours as well?
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  #6  
Old May 25th, 2012, 12:26 AM
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yeah looks like ya went a little deep huh? Hey man, at least you were going for it and it's that's all that went wrong, not too bad!

Awesome, thanks for the advice Nathan, I'll let you know if that works.

------ Follow up post added May 25th, 2012 12:28 AM ------

No the red NAS is a client's Rover that we're helping sell. Helping him work out the issues. It's funny how the ROW and NAS's both have the 2nd gear to the left shift thing.
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Old June 4th, 2012, 10:15 PM
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Chad Davis
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Hi Nathan,

Thanks for the advice on the alternator, spot on. Screwdriver trick was awesome!

Is that $225 one the proline one on RN?
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Old June 4th, 2012, 10:31 PM
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Neither, http://www.actionalternator.com/p_home.asp

Another crappy day in Charleston huh. Is that Daniel Island? I have family over on the IOP.
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Old June 4th, 2012, 10:51 PM
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Charles is right...Action Alt is where I got mine. It's essentially a 140amp Delco (vs the original is 90amp I think). Make sure you get the harness from them too.
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  #10  
Old June 4th, 2012, 11:04 PM
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Hey Charles, that's a really good guess, giving the architecture and how close together those houses are. It's belle hall, bout 5-6 miles before the DI bridge. Love IOP, trying to convince my fiance to move to goat island, right behind iop, and that commuting by boat is always cool! Don't know if you can beat the weather we've been having lately. Thanks guys! Just sent those guy a message.
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Old July 13th, 2012, 12:45 AM
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engine sound after alternator replaced

muuuuch better!

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