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Fix one thing. Get another problem...

Discussion in 'Stock 1995 - 2001 Explorers' started by ThreeJs, June 18, 2017 at 12:26 PM.


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    1. ThreeJs

      ThreeJs Active Member

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      Got my waterpump swapped out yesterday and now I think my alternator is acting up.

      I do most of my driving during the day so, no headlights. Last week I heard something rattling under the hood while putting up garage sale signs Fri. night. Then it stopped.

      I figured out the noise only starts when I am running a full load on the alternator. Lights, max A/C and radio all on.
      Turn on light switch...ratting noise. Turn off ...noise stops..
      Gotta be the alternator?
       
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    3. WMC99

      WMC99 New Member

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      Off-hand, I'd say you may be hearing the alt. pulley bearing going out.
       
    4. boominXplorer

      boominXplorer Elite Ranger Elite Explorer

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      Belt tensioner I bet
       
    5. WMC99

      WMC99 New Member

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      Quite possible.

      @ ThreeJs ... Find a short length of hose and use it as a stethoscope to isolate the noise. One end to your ear and the other end touching various components like the pulleys and bearings. You should be able to isolate the noise.
       
    6. ThreeJs

      ThreeJs Active Member

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      I used a long screwdriver and it does sound like it's coming from the alternator.

      I'll double check the tensioner but I don't think it's that.
       
    7. swshawaii

      swshawaii Explorer Addict

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      Or remove the belt and check ALL pulleys by hand.
       
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    8. MAS Tequila

      MAS Tequila Elite Explorer

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      Listen to our Hawaiian brother.

      About 2 weeks ago I swore my power steering pump was heading south.

      I put my mechanic's stethoscope on the different accessories and would have bet the farm the power steering pump was making the noise I was hearing while driving.

      So I dusted off the spare pump I had on the shelf, figured I'd be swapping it out over the weekend.

      Guess what happened the following day, the AC started blowing hot!

      It's cheap, as in free, to loosen the belt and spin everything to see what is really making the noise.

      Me, I'm waiting for parts to come in, with my Mounty in pieces.
       
    9. ThreeJs

      ThreeJs Active Member

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      Winner winner......:dpchug:

      After being able to check it out during the day I found the tensioner bouncing.
      Replaced it this morning and..so far...everything seems good.
       
    10. boominXplorer

      boominXplorer Elite Ranger Elite Explorer

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      Sweet, glad you got it figured out. It's the spring inside the body of the tensioner that makes all the noise usually.
       
    11. ThreeJs

      ThreeJs Active Member

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      So. The tensioner needed replacement anyway because it was bouncing a lot.
      After driving it yesterday for an hour in 110* heat the noise returned. I think the new added tension put more load on the alternator.
      When everything got hot the bearing/bushing allowed the excessive play.
      Replaced the alternator and for now all seems well.

      The noise after replacing the tensioner and everything good and hot....

       
      Last edited: June 22, 2017 at 1:05 AM
    12. Spuddy

      Spuddy Active Member

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      Nice!

      And, yes, those tensioners go anyways, and usually trash the belt and assorted vacuum lines when they do.
       
    13. UtahX

      UtahX Elite Explorer

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      Yeah, always one thing after another.:)
       
    14. 96eb96

      96eb96 Well-Known Member

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      The idler pulley on 95-98 OHV is a known failure point if it is original. Seriously, replace it ASAP, takes 5 minutes.. The just fail suddenly. Years back it was quite a common issue. First symptoms are random noises that come and go.
       
    15. ThreeJs

      ThreeJs Active Member

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      gotta laugh. The new reman alternator I just installed stopped charging on the way to work this morning.
      Luckily I work at a auto parts store and it only takes 5 min. to pull out the alternator.
      Got the warranty replacement installed. Knock on wood. Hope this one lasts more than 2 days......

      I had already considered replacing the idler pulley.
      Going to look one up tomorrow and probably replace it during my lunch break.
      what.. a 3/8 ratchet and a 15mm wrench?
       
    16. 96eb96

      96eb96 Well-Known Member

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      If the battery light goes on it is because of the alternator spade plug. It don't make good contact with the terminal. I think I had to bend mine with a small screwdriver, no issues since. I think you are right on the wrench size, but it was a while ago.
       
    17. ThreeJs

      ThreeJs Active Member

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      Nah...not the connection. I did double check the connections before removing.

      Pulled the alternator and tested it. Only put out 11.4V.

      Gotta say..it is good working at an auto parts store when I need something :)
       
    18. Spuddy

      Spuddy Active Member

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      It is good to be king.
       

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