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[Mk2] [NA] Alternator... again!

 
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Racer7




Joined: 20 Aug 2007
Posts: 536
Location: SW London
Feedback Score: 6

1999 Toyota MR2 Mk2 NA Rev5

PostPosted: Sat Jan 19, 2019 10:50 am    Post subject: [Mk2] [NA] Alternator... again! Reply with quote Reply with quote including images

So I broke down in London two days before Christmas with the familiar (to me) Christmas tree dashboard and my stereo going loopy.

Experience tells me the alternator has gone and indeed the call out service confirmed that.

On inspection though I notice that the belt is still fine and the unit spins freely. I have read that sometimes the regulator is the thing that gets messed up.

I was wondering how easy is it to source and fit a new regulator? I ask as I only fitted this from TCBparts a few years ago. It's seen less than 1500miles!

In terms of prolonging the life of the alternator is the plan to not take the car out in the rain? Seems the NA engine lid vents are open right above the alternator. I'm thinking this might be part of my problem.

Any Greater London/London garage recommendations would be good too as I now need to get the car towed.
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pbmr2




Joined: 18 Jun 2010
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PostPosted: Sat Jan 19, 2019 3:43 pm    Post subject: Reply with quote Reply with quote including images

my NA has done 9k this year in all weather and the replacement alternator is still going strong.

The last car was 3 years on the the stock (original) alternator and althrough it lived in a garage overnight, it was driven in all weather and covered about 20k in the 3 years.

sometimes the rebuilds are not the best. you can get the regulator as a part, there used to be a guy on ebay selling just the internal replacement bits.
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Racer7




Joined: 20 Aug 2007
Posts: 536
Location: SW London
Feedback Score: 6

1999 Toyota MR2 Mk2 NA Rev5

PostPosted: Sat Jan 19, 2019 11:42 pm    Post subject: Reply with quote Reply with quote including images

pbmr2 wrote:
my NA has done 9k this year in all weather and the replacement alternator is still going strong.

The last car was 3 years on the the stock (original) alternator and althrough it lived in a garage overnight, it was driven in all weather and covered about 20k in the 3 years.

sometimes the rebuilds are not the best. you can get the regulator as a part, there used to be a guy on ebay selling just the internal replacement bits.


Thanks for the info. I did think it was particularly short lived. It's a vectron unit.

I was starting to think that maybe a drip drip from condensation on my metal roof garage might have exacerbated things.

I forgot to ask with regards to the regulator. Presumably still thr same amount of labour as swapping in a whole new unit?

Oh one more related thing. How far can one drive on just battery alone? Wipers, lights and other electrical draining things minimised of course. Need to use my car for a few 3mile trips (total round trip) since the car technical runs i was thinking of driving on just the battery. Then charging with my ctek mains chrger.
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abovetherim




Joined: 16 Feb 2011
Posts: 587
Location: Leicester
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1991 Toyota MR2 Mk2 NA Rev1

PostPosted: Wed Jan 23, 2019 10:47 am    Post subject: Reply with quote Reply with quote including images

Before condemning the alt itself check the wiring to it. Common problem is the alt sense wire, black and yellow iirc. If you Google testing the alt wires there is plenty of info out there about how to and which wires etc.

As for the alt itself, have you considered removing it yourself? Not too difficult a job on an n/a with a few basic tools. You could then take it to a rebuilder for testing and remedial work if needed. Last one I got rebuilt cost me £60.
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Racer7




Joined: 20 Aug 2007
Posts: 536
Location: SW London
Feedback Score: 6

1999 Toyota MR2 Mk2 NA Rev5

PostPosted: Thu Jan 24, 2019 9:58 pm    Post subject: Reply with quote Reply with quote including images

abovetherim wrote:
Before condemning the alt itself check the wiring to it. Common problem is the alt sense wire, black and yellow iirc. If you Google testing the alt wires there is plenty of info out there about how to and which wires etc.

As for the alt itself, have you considered removing it yourself? Not too difficult a job on an n/a with a few basic tools. You could then take it to a rebuilder for testing and remedial work if needed. Last one I got rebuilt cost me £60.


I'm guessing what might have been the issue is the condensation dripping right on the engine bay in my garage that has done something to it.

Since it was only fitted a few years ago I guess I could conceivably try - the first time it went I think it was the original and Luke at PW needed a 1metre breaker bar and the car way up on the ramps to get enough force to loosen the nut. This is what I'm worried about in terms of trying it myself.
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