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Alternator noise

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mk1divemaster
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Alternator noise

Postby mk1divemaster » Mon May 14, 2018 8:48 pm

Hi all ,
Just recently started getting a noise from alternator
It’s like a whirring sound and obviously gets faster the higher the revs.
Question is my alternator on the way out or can I do something to stop the noise.its defo not a belt slip issue.
If it’s on way out is it cheaper to have it reconditioned or buy second hand?
Cheers
V6 Power Junkie
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Re: Alternator noise

Postby V6 Power Junkie » Mon May 14, 2018 9:52 pm

Make sure nothing's rubbing the belt and all bolts are tight before you do anything

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blackyb
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Re: Alternator noise

Postby blackyb » Mon May 14, 2018 10:02 pm

Does the whine/whirring get louder with more electrical load.

Have you checked its output with a volt meter.

Personal choice but if my alternator was on its way out, I would fit a new one asap. They tend to just pack up without warning. Most alternators suppliers operate an exchange units policy these days..
1993 1.6 Eunos Roadster (gone)
1998 UK Mk 2 1.6 (gone)
2003 1.8 SVT Sport (Why did I sell it!!!!)
1991 1.6 Eunos Roadster with a bit of bling.

Life is a journey, best travelled topless in an MX5!!
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Re: RE: Re: Alternator noise

Postby V6 Power Junkie » Mon May 14, 2018 11:10 pm

V6 Power Junkie wrote:Make sure nothing's rubbing the belt and all bolts are tight before you do anything

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Also all the pulleys, check for loose and bearing failure in all the pulleys it runs on for wear and looseness, and also the adjuster and wheel

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Re: Alternator noise

Postby Mazda Mender » Mon May 14, 2018 11:18 pm

Sounds like it could be on the way out..brushes or comms worn ..but it could also be the tension on the Aux belt to tight putting pressure on the spindle and pulley making the noise...
If it is on the way put get it chamged asap bud.
M-m
The Disclaimer:-
This post is a natural product made from recycled electrons. The slight variations in spelling and grammar enhance its individual character and beauty and in no way are to be considered flaws or defects, the articles/answers/comments are provided for information purposes and they are not intended to substitute informed professional advice, I or mazdamenders.net cannot personally be hold responsible for any damage occurred from following this procedure or any injuries from it. Proceed at your own risk.


Mk 1 Eunos 93 black V.S II 1.8 ,
Mk 2 .1/4 Roadster 99 black & gold V.S 1.8 being rebuilt,
Mk 1 Eunos 90 1.6 (claimed by daughter)
MK 2.1/4 Blue V.S Roadster 1.8 99 ...being rebuilt

http://www.mx5oc.co.uk/ http://www.mx5nutz.com/forum/ http://miata.net/ http://www.autolinkuk.co.uk/
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mk1divemaster
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Re: Alternator noise

Postby mk1divemaster » Wed May 16, 2018 1:15 am

Got brand new alternator from eurocarparts 35% off ÂŁ119 chuffed ! Just need a how to now to replace it!
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Re: Alternator noise

Postby Mazda Mender » Wed May 16, 2018 6:12 am

Just make sure it is 100% the correct one before fitting,,,,,is she a 1.6 or 1.8.
M-m
The Disclaimer:-
This post is a natural product made from recycled electrons. The slight variations in spelling and grammar enhance its individual character and beauty and in no way are to be considered flaws or defects, the articles/answers/comments are provided for information purposes and they are not intended to substitute informed professional advice, I or mazdamenders.net cannot personally be hold responsible for any damage occurred from following this procedure or any injuries from it. Proceed at your own risk.


Mk 1 Eunos 93 black V.S II 1.8 ,
Mk 2 .1/4 Roadster 99 black & gold V.S 1.8 being rebuilt,
Mk 1 Eunos 90 1.6 (claimed by daughter)
MK 2.1/4 Blue V.S Roadster 1.8 99 ...being rebuilt

http://www.mx5oc.co.uk/ http://www.mx5nutz.com/forum/ http://miata.net/ http://www.autolinkuk.co.uk/
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mk1divemaster
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Re: Alternator noise

Postby mk1divemaster » Wed May 16, 2018 6:46 am

She's a 1.6 with v belt pulley
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Re: Alternator noise

Postby Mazda Mender » Wed May 16, 2018 7:53 am

Then it is far easier than a 1.8...i will put something together.
M-m
The Disclaimer:-
This post is a natural product made from recycled electrons. The slight variations in spelling and grammar enhance its individual character and beauty and in no way are to be considered flaws or defects, the articles/answers/comments are provided for information purposes and they are not intended to substitute informed professional advice, I or mazdamenders.net cannot personally be hold responsible for any damage occurred from following this procedure or any injuries from it. Proceed at your own risk.


Mk 1 Eunos 93 black V.S II 1.8 ,
Mk 2 .1/4 Roadster 99 black & gold V.S 1.8 being rebuilt,
Mk 1 Eunos 90 1.6 (claimed by daughter)
MK 2.1/4 Blue V.S Roadster 1.8 99 ...being rebuilt

http://www.mx5oc.co.uk/ http://www.mx5nutz.com/forum/ http://miata.net/ http://www.autolinkuk.co.uk/
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mk1divemaster
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Re: Alternator noise

Postby mk1divemaster » Wed May 16, 2018 8:08 am

Get a move on then as I’m doing it now!
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Re: Alternator noise

Postby Mazda Mender » Wed May 16, 2018 10:16 am

pull the electrics off the battery, pull the plug off the alternator and unbolt the earth...undo the tensioner adjustment bolts and block... push the Aux belt to one side ,wedge the rear wheels a jack the car up on the drivers front, drop her onto a axial stand, undo the 3x 10mm head bolts that hold the under tray on that side and the 1 x 10mm nut and 3 x 10mm head self tappers the hold the nose to the air guide so you can get to the bottom of the alternator , crack the hinge bolt (14mm bolt and nut) and remove , yes this can be done from above but you need to drop the alternator down and out so you might as well crack it while you are there than struggling, once the hinge bolt is clear it is just a case of pulling the alternator out and slot the new one in ,refit as removed.
M-m
The Disclaimer:-
This post is a natural product made from recycled electrons. The slight variations in spelling and grammar enhance its individual character and beauty and in no way are to be considered flaws or defects, the articles/answers/comments are provided for information purposes and they are not intended to substitute informed professional advice, I or mazdamenders.net cannot personally be hold responsible for any damage occurred from following this procedure or any injuries from it. Proceed at your own risk.


Mk 1 Eunos 93 black V.S II 1.8 ,
Mk 2 .1/4 Roadster 99 black & gold V.S 1.8 being rebuilt,
Mk 1 Eunos 90 1.6 (claimed by daughter)
MK 2.1/4 Blue V.S Roadster 1.8 99 ...being rebuilt

http://www.mx5oc.co.uk/ http://www.mx5nutz.com/forum/ http://miata.net/ http://www.autolinkuk.co.uk/
John&Luke
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Re: Alternator noise

Postby John&Luke » Wed May 16, 2018 10:15 pm

Now that’s a COOL service! Bang ask a question and Wayne to the rescue!!

Love it.

Ps restoring a Mk1 over the weekend can you post a full restoration plan ASAP :lol:
1996 Mk1 Classic Red 1.6 sorted
1995 Mk 1 White 1.6 in need of TLC
2015 Mk1 1.8 Exocet Mk1 on steroids
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mk1divemaster
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Re: Alternator noise

Postby mk1divemaster » Thu May 17, 2018 12:40 am

Cheers for that Wayne!
Major problem undoing top alternator bolt that goes through adjuster block, Bar Steward thing sheared off.ordered a used bolt from autolink but going to struggle getting end of bolt out of alternator it's stuck solid ! Wd40 is my only hope !
Had to take new alternator back as fitment detail was different !
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Re: Alternator noise

Postby Mazda Mender » Thu May 17, 2018 6:44 am

You have the adjuster bolt and the one that goes through the adjuster bracket and adjuster block, you should still be able to swap out and add the bolts and block when fitted.

And just as a foot note... WD40 is a water repellent ( i can tell your old school ;0) )not a freeing up oil....you want plus gas or a good penetrating spray buddy.
M-m
The Disclaimer:-
This post is a natural product made from recycled electrons. The slight variations in spelling and grammar enhance its individual character and beauty and in no way are to be considered flaws or defects, the articles/answers/comments are provided for information purposes and they are not intended to substitute informed professional advice, I or mazdamenders.net cannot personally be hold responsible for any damage occurred from following this procedure or any injuries from it. Proceed at your own risk.


Mk 1 Eunos 93 black V.S II 1.8 ,
Mk 2 .1/4 Roadster 99 black & gold V.S 1.8 being rebuilt,
Mk 1 Eunos 90 1.6 (claimed by daughter)
MK 2.1/4 Blue V.S Roadster 1.8 99 ...being rebuilt

http://www.mx5oc.co.uk/ http://www.mx5nutz.com/forum/ http://miata.net/ http://www.autolinkuk.co.uk/
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mk1divemaster
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Re: Alternator noise

Postby mk1divemaster » Thu May 17, 2018 7:15 am

Not swapping alternator now Wayne , had fella at autotronic have a listen and he said it defo ain't alternator but vacuum leak on hose which I've replaced all good , just got to try and free this upper lock bolt on alternator now ! Any ideas would be welcome buddy :handgestures-thumbup:

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