TopGun65
X-TRAIL ENTHUSIAST
Date Registered: 07-2015
TOTAL POSTS: 208
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T31 Noisy Alternator?
Hi, I have a rattling/ knocking sound coming from the alternator area and want to know if anyone else has the same sound. When idling either in gear or neutral, at around 750 rpm, with the a/c on, the noise is present. If I turn the a/c off and put the headlights on, the noise is there. If there is little load on the alternator, there is no sound. If I increase the revs in either situation, the noise disappears. I find that the lower the revs, the more noise it makes. Its very noticeable from inside the car. The alternator is charging at around 13.92 volts at idle. The car has done 93,000kms, has no problems starting and has had a new battery in January. If I put a long scewdriver on the alternator and listen for sounds, there is a whine but I think that's normal. The mounts are tight. Should I do a idle reset just to make sure its not idling to low?
Thanks
--- Eric
X-4282 (c)
Glen Alpine, Sydney
2010 T31 Cvt STL
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7/Dec/2015, 6:40 pm
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jalalski
Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29100
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Re:
Annual Operating Plan? LOL
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8/Dec/2015, 3:19 pm
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TopGun65
X-TRAIL ENTHUSIAST
Date Registered: 07-2015
TOTAL POSTS: 208
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Re: T31 Noisy Alternator?
Ok, Thanks for that. You learn something every day. I've been hearing that sound in my other car, an EL Ford Falcon for the last 435,000ks, ( still the original alternator, and engine), and was wondering what it was. Now I know. I don't think I've heard that sound, but I will check it as soon as I get a chance.
Thanks Heligeorge
Last edited by TopGun65, 10/Dec/2015, 2:57 pm
--- Eric
X-4282 (c)
Glen Alpine, Sydney
2010 T31 Cvt STL
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9/Dec/2015, 5:28 pm
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