Ominous Alternator noise! - Defender Source
Defender Source  

Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions


Reply
 
Thread Tools
  #1  
Old July 15th, 2004, 07:33 PM
Eric Siepmann
Status: Offline
Eric W. Siepmann
1997 Defender 90 SW
Member
 
Join Date: Dec 2003
Location: Chicago, IL, Cook
Posts: 883
Exclamation Ominous Alternator noise!

Started hearing a squeaking sound emminating from under the hood. Thought it might be a belt or bearing. I checked the belt, which looks new, and there pulleys/bearings are also in good operational order. Seems to be coming from the alt.

Is this a sign that the alt is going south on me? How involved is the repair for a noob mechanic?

Thanks,

EwS
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old July 15th, 2004, 09:45 PM
Bowtracer's Avatar
Bowtracer
Status: Offline
Peter Sherman
NAS 110
Member
 
Join Date: May 2004
Location: Old Mill Creek IL
Posts: 690
Take a long screw driver & hold one end on the alt & the other end up to your ear! That should tell the story. Sort of a stethoscope sorta thing!
Peter
Reply With Quote
  #3  
Old July 15th, 2004, 11:21 PM
Eric Siepmann
Status: Offline
Eric W. Siepmann
1997 Defender 90 SW
Member
 
Join Date: Dec 2003
Location: Chicago, IL, Cook
Posts: 883
Peter you speaking from past experience? You forgot to tell me to stand in a puddle of water...

EwS
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old July 16th, 2004, 12:16 PM
Bowtracer's Avatar
Bowtracer
Status: Offline
Peter Sherman
NAS 110
Member
 
Join Date: May 2004
Location: Old Mill Creek IL
Posts: 690
Eric, this works I am not yanking your chain!
Reply With Quote
  #5  
Old July 16th, 2004, 01:17 PM
BarryO
Status: Offline
Barry O'Mahony
97 D-90 SW LE
Member
 
Join Date: Dec 2003
Location: Bend, OR
Posts: 281
At 12 volts, standing in a puddle of water is no hazard.

Pulling an alternator is easy. Take it to an alternator/starter repair shop.
Reply With Quote
  #6  
Old July 16th, 2004, 04:23 PM
Eric Siepmann
Status: Offline
Eric W. Siepmann
1997 Defender 90 SW
Member
 
Join Date: Dec 2003
Location: Chicago, IL, Cook
Posts: 883
For real? OK. I'll give it a try this weekend.

EwS
Reply With Quote
  #7  
Old July 16th, 2004, 07:47 PM
Bowtracer's Avatar
Bowtracer
Status: Offline
Peter Sherman
NAS 110
Member
 
Join Date: May 2004
Location: Old Mill Creek IL
Posts: 690
Eric where in Chi town are you! I will be racing out of Montrose SAT & SUN.
Reply With Quote
  #8  
Old July 17th, 2004, 11:57 PM
Bowtracer's Avatar
Bowtracer
Status: Offline
Peter Sherman
NAS 110
Member
 
Join Date: May 2004
Location: Old Mill Creek IL
Posts: 690
you must be a cop or a fireman. jk I passed through your hood. I took Peterson out! If you get this tonight pm me your phone # & I will call on my way out Sun.
Peter
Reply With Quote
  #9  
Old July 18th, 2004, 11:28 AM
Davis's Avatar
Davis
Status: Offline
Chris Davis
94 NAS D90 6.2LS
Member
 
Join Date: Nov 2003
Location: Colorado
Posts: 2,506
If it is a squeek, spray some belt-stop-squeek spary on the belt. Or do what I do and hold a bar of soap on the inside of the belt while the car is running (carefully!) and the slip goes away (assuming the belt is the right tightness). The best thing to do is to loosen the belt to the alternator and run the car and see if the noise is still there--if it is, loosen the other belts one by one (but only run the truck a short time only). It could be a belt, or it could be a bearing (alternator/water pump, ect). Check the belts for small frays. If you have a serpentine belt (and I think the 97's do, but am not sure) then I would first check the belt tension, then use the soap, and then check the alternator bearings.


Changing a bearing in an alternator is easy if you are mechanically minded. Bearings are cheap.
Reply With Quote
  #10  
Old July 18th, 2004, 02:23 PM
Eric Siepmann
Status: Offline
Eric W. Siepmann
1997 Defender 90 SW
Member
 
Join Date: Dec 2003
Location: Chicago, IL, Cook
Posts: 883
you must be a cop or a fireman. jk I passed through your hood. I took Peterson out! If you get this tonight pm me your phone # & I will call on my way out Sun.
Peter

Peter, Sorry I missed you was out riding my Mountain Bike.

I am an accountant actually. The return on Chicago Real estate on the north and near north is insane after only 2-3 years, so I went in on a venture with a few freiends to get some cash.

You part of the CLRC?

EwS
Reply With Quote
  #11  
Old May 16th, 2005, 03:00 PM
BarryO
Status: Offline
Barry O'Mahony
97 D-90 SW LE
Member
 
Join Date: Dec 2003
Location: Bend, OR
Posts: 281
So did you figure this out? I have the same type of squeak.

With the hood up, it seems to loud and unmuffled to be coming internally from the engine. I'm hoping the worst it can be is an alternator or pump bearing.
Reply With Quote
  #12  
Old May 16th, 2005, 04:09 PM
Eric Siepmann
Status: Offline
Eric W. Siepmann
1997 Defender 90 SW
Member
 
Join Date: Dec 2003
Location: Chicago, IL, Cook
Posts: 883
I was a bearing. I don't remember which one though. Been awhile. I ended up getting the same Bosch used by the factory for the cold climate upgrade.

Basically, once that bearing noise showed up I just replaced it a a matter of fact.
Reply With Quote
  #13  
Old May 16th, 2005, 05:01 PM
BarryO
Status: Offline
Barry O'Mahony
97 D-90 SW LE
Member
 
Join Date: Dec 2003
Location: Bend, OR
Posts: 281
An alternator bearing?

Where did you get the replacement?
Reply With Quote
  #14  
Old May 16th, 2005, 05:26 PM
Eric Siepmann
Status: Offline
Eric W. Siepmann
1997 Defender 90 SW
Member
 
Join Date: Dec 2003
Location: Chicago, IL, Cook
Posts: 883
Yeah, I believe it was. It was so long ago I can't remember what exactly was wrong with it but it was some bush or bearing that was causing the noise or where it was in the Alt. A new Bosch was cheaper than a reman (I bird-dog for the shop so he cuts me some good deals for referrals). I took this one into my mechanic as I really didn't have the time to look at it in depth due to work. He showed me the old unit before shipping and the Merrelli was about to grenade anyway so I just had him replace it. I gave it a cursory review and left it at that as the shop is pretty stand-up and have never tried to upsell me or replace crap that worked fine.

I do not know where he got it from. It was the correct OEM replacement Altenator for cold starts though. I checked when I picked it up. No probolems to date. Knock on wood.

Sorry, not much help other than I got the checkbook out.

EwS
Reply With Quote
  #15  
Old May 16th, 2005, 05:34 PM
BarryO
Status: Offline
Barry O'Mahony
97 D-90 SW LE
Member
 
Join Date: Dec 2003
Location: Bend, OR
Posts: 281
Thanks.
Reply With Quote
Reply

Lower Navigation
Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions

Tags
alternator

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 04:47 PM.


Copyright