Electrical & Lights Noisy alternator

Discussion in '1st Generation (2004-2011)' started by Falcoron, Tuesday 7th Aug, 2018.

  1. Falcoron Club Member ★ ☆ ☆ ☆ ☆

    Northern Ireland Ron Belfast
    28
    2
    hi guys, I replaced my alternator with a reconditioned one 18 months ago,
    It’s now very noisy sounds like a rattly
    Bearing, charges fine and no battery warning light but loud noise.
    Would this be the alt itself or something else?
    used a stethoscope on the surrounding parts and nothing but put on the alt body and you can here the growl of a bearing. Not sure if anything else would send noise to alt or not. what else could do that in there?
    Cheers
     
  2. jd1959 Top Contributor ★ ★ ★ ★ ☆

    Ireland Zack Kilkenny
    503
    296
    All I could suggest is having another good look over the belt driven accessories, including removing the belt and starting just to confirm that the noise is indeed in that system then the usual wiggle and inspection of each pulley. I don't know if that engine has an auto belt tensioner but checking that and any idler pulleys should be on the list as well. When my auto tensioner was in the process of failing it would make rattly sound every time the ac compressor kicked in.

    It would be a bit of a kick but it is possible the replacement alternator is in the process of failing if as you say the bearing is already growling.
    Good Luck
    JD
     
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  3. stu(pid) Club Member ★ ☆ ☆ ☆ ☆

    UK
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  4. Cliveski Junior Member ☆ ☆ ☆ ☆ ☆

    United Kingdom Cliveski Corby
    5
    2
    Hi there, rather than start a new thread I thought I would jump in on this one as it's relevant to my issue . . . .

    My FR-V 2.2 CDTi has a slight whining noise and rumbling noise when driving (difficult to describe but sounds like a belt is too tight) which I believe could be coming from the aux belt area. At idle it's a little noisy and a more rough/louder version of the noise comes and goes - at first I thought this was when the aircon compressor was kicking in and out but it made the noise with that switched off.

    My car has the original long belt so my understanding is the noise could be from one of three things -

    The Idler/Guide Pulley which is removed when the shorter aux belt is fitted
    The alternator clutch pulley
    The aux belt tensioner pulley

    I have the gates version of the shorter belt (£20)
    I see the alternator clutch pulley bearings can be bought for £35
    A complete belt tensioner is £95+

    I have seen instructions on how to change to the shorter belt (and doing away with the idler pulley). Does anybody have a clue on how easy it is to change the alternator clutch pulley and belt tensioner? Is it DIY or best to get a garage to change them all at the same time?
     
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  5. stu(pid) Club Member ★ ☆ ☆ ☆ ☆

    UK
    43
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  6. Cliveski Junior Member ☆ ☆ ☆ ☆ ☆

    United Kingdom Cliveski Corby
    5
    2
    I had seen/heard about this but assumed that noise would only appear when turning? If that's not the case then that is something else
    - - - Updated - - -
    I have taken a look at my power steering fluid and it was bubbling a lot just like the youtube video on the post you pointed me too stu(pid) or one of the links to another post within that one.

    The power steering pump itself seemed a bit noisy too so guess I will change the O rings and fluid before anything else.

    Thanks!
     
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  7. andy83 Club Veteran ★ ★ ★ ★ ★

    United Kingdom andy shropshire
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