alternator advice

Discussion and technical advice for 84-89 AW10 & AW11 MR2. 3A-LU, 4A-GE, 4A-GZE.

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laam999
Posts: 68
Joined: Fri Feb 05, 2010 12:06 pm
Location: Hartlepool, Cleveland/Durham

alternator advice

Post by laam999 »

Hi, I followed the instrustions in the BGB to remove the alternator, I removed both bolts and I couldn't removed the belt as I couldn't get the alternator to move. I'm just asking if there is something I'm missing. It just won't move, I have no idea what else to try, I have hit it with a hammer to try and gett it to move with no success, the BGB makes out there are only the two bolts holding it in place. Could someone please let me know if this is true/untrue?

Thanks

Liam
Last edited by laam999 on Mon Jun 21, 2010 10:21 am, edited 1 time in total.
ulysess1966
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SC/NA

Post by ulysess1966 »

What sort of car is it? On the SC there is an adjustable idler pulley that needs to be slacked off before you can get the belt off, although IIRC that isn't the case on the NA, but I could be wrong.
nosfera2
Posts: 14
Joined: Sun Jan 03, 2010 4:52 pm

Re: alternator advice

Post by nosfera2 »

I can confirm that it is just 2 bolts, having just removed an alternator. Be aware that the bottom bolt runs right through the alternator case, so you must fully extract this i.e. only taking the nut off the end isn't enough.

If you have already done this, then it could just be stuck tight in the lower bracket, a good bit of jiggling or a pry bar should release it.
Boddney
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Location: Horsford, Norfolk

Re: alternator advice

Post by Boddney »

Both of the last posts are spot on laam.

Once you have got it free lift out the header/overflow coolant bottle and wriggle the alt out from the top.

I followed the wheeler dealer bloke Edd China as he got it out from underneath some how and I spent ages under the car on my back swearing and getting angry as there seems to be no way through for it that way.

Good luck,
Bod
midlife crisis
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Joined: Fri Mar 27, 2009 12:38 pm
Location: Birmingham

Re: alternator advice

Post by midlife crisis »

Hi Liam,

I find it easiest to loosen the bottom bolt but leave it in (the long straight-through one, best accessed with the car on ramps, but can be got to if you squeeze under with or without jacking the car up a couple of inches), and remove the upper bolt (the small bolt which is easily accessed from the top.

If you've removed the bottom bolt completely, which it sounds like you have, you may find that the alternator wedges and won't move. If you leave the bottom bolt in but loosened, the alternator will rotate on the right path and won't (or shouldn't :-k ) jam.

If it's not moving, spray some WD-40 at the lower bracket, and I tend to use a long wrench down behind the alternator, using the rear bulkhead as a point against which to lever the alternator enough to remove the belt.

As the alternator won't move, use the WD-40 and hammer (with a wooden block against the alternator) to free it up before levering. Also, remove the plug and the upper bond first so you don't damage the wiring. It should rock back and forward quite freely if it's not rusted in place.

Good luck! :D
midlife crisis
Posts: 42
Joined: Fri Mar 27, 2009 12:38 pm
Location: Birmingham

Re: alternator advice

Post by midlife crisis »

Also, nice one Bod! :D The first time I did the alternator I followed Haynes' advice and took off the exhaust. The next time I realised it would come out the top with the bottle removed - I guess maybe Haynes doesn't say this as it 's based on the Mk1a and is there a difference?

Means it's a much easier job...
LimeyMk1
IMOC Committee
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Location: Gosport

Re: alternator advice

Post by LimeyMk1 »

If all else fails and the alternator really won't budge you could remove the bracket from the engine block. Once the whole lot's off you can put the bracket in a vice and wiggle it out as you can get a better purchase on it. I've done it this way a couple of times.
un1eash
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Location: Leicester

Re: alternator advice

Post by un1eash »

I filed down the alternator on refit aswell making it alot easier to remove/adjust in the future.
LimeyMk1
IMOC Committee
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Re: alternator advice

Post by LimeyMk1 »

un1eash wrote:I filed down the alternator on refit aswell making it alot easier to remove/adjust in the future.


Shouldn't be needed Chris, there's a sliding sleeve in one side that pinches down on the alternator when you tighten it up. If the alternators seized it's most likely due to this seizing up. Another good reason to remove the bracket so you can tap the sleeve out, clean it up and regrease it.
laam999
Posts: 68
Joined: Fri Feb 05, 2010 12:06 pm
Location: Hartlepool, Cleveland/Durham

Re: alternator advice

Post by laam999 »

thanks for all the advice guys, both bolts are fully out and one of the wires is disconnected I have to admit I'm struggling to find/reach the second That's got a nut holding it)

I'm going to be having another go this Fri, Sat or Sun, dependant on weather.

I never thought about removing the bottle, wouldn't make things a hell of a lot easier I think

Thanks

Liam
SuperRedMR2
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Location: Wickford, Essex

Re: alternator advice

Post by SuperRedMR2 »

yes removing the coolant reservior bottle is the first thing i did when i replaced mine. so much more room.

from what i recall is the adjusting nut and the big bolt at the bottom. ive used a big bar to loosen it up whenever i've done it.
kaiowas
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Re: alternator advice

Post by kaiowas »

laam999 wrote:I have to admit I'm struggling to find/reach the second That's got a nut holding it)


Hopefully I'm stating the obvious here but make sure you've disconnected the battery before undoing that one. It's a direct connection to the battery +ve and will give you quite a fright if you start poking at it with spanners whilst it's still live.
laam999
Posts: 68
Joined: Fri Feb 05, 2010 12:06 pm
Location: Hartlepool, Cleveland/Durham

Re: alternator advice

Post by laam999 »

Thanks for the concern ^_^ I keep the battery disconnected untill I move the car, 90% of the time it doesn't move and it doesn't hold a charge so I don't bother keep it connected, I just charge when needed.


Hopefully tonight will be my lucky day at removing it

Anyone had any luck refubishin their own? I'm going o be using the BGB but the more help the better

Liam
laam999
Posts: 68
Joined: Fri Feb 05, 2010 12:06 pm
Location: Hartlepool, Cleveland/Durham

Re: alternator advice

Post by laam999 »

ok, this will still sound stupid but how the hell do I remove the coolant reservoir to get to the alternator? I thought it would just be screwed on but it seems to be done from the centre near the engine bay wall, behind the carpet in the boot there are two bolts sticking through with no nuts or heads so I have no way to remove them.

I am going have a good read of the BGB now but I think you guys give good advice and would love any help you can give

Liam
kaiowas
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Re: alternator advice

Post by kaiowas »

It's just slotted onto it's brackets and will come off with a good pull upwards.
laam999
Posts: 68
Joined: Fri Feb 05, 2010 12:06 pm
Location: Hartlepool, Cleveland/Durham

Re: alternator advice

Post by laam999 »

Hey, figured only fair to let you know I got the alternator out, but only by taking the bracket off the engine block like I was suggested.

Thanks for the help again fellas. I think I'll post some pics of what I'm doing soon.

Liam
laam999
Posts: 68
Joined: Fri Feb 05, 2010 12:06 pm
Location: Hartlepool, Cleveland/Durham

Re: alternator advice

Post by laam999 »

ok, one last thing, can the engine start with the alternator disconnected? It was running on but always needed jump starting, now with no alternator i, it just "clicks" it doesn't try to turn over or anything. I figured it would start and run off the battery fine.

Is this norm?

Liam
un1eash
Posts: 4453
Joined: Fri May 13, 2005 8:25 pm
Location: Leicester

Re: alternator advice

Post by un1eash »

Sounds like the battey is dead. Ive fired mine up before without the aux belt on.
laam999
Posts: 68
Joined: Fri Feb 05, 2010 12:06 pm
Location: Hartlepool, Cleveland/Durham

Re: alternator advice

Post by laam999 »

Ok, thanks. once I got the alternator out I noticed the rectifier has snapped. I assume it's going to be easier to get a replacement for this than repair rebuild it. I am however going to ask Toyota is it's possible to get this part as I would really like to rebuild this myself.

Incase I do need to get a replacement can anyone suggest a cheap place to get one? I am working on a budget and ebay they seem to be over £100, or is this just normal?

Thanks

Liam
un1eash
Posts: 4453
Joined: Fri May 13, 2005 8:25 pm
Location: Leicester

Re: alternator advice

Post by un1eash »

Find a local starter motor/alternator refurb place. They should be able to supply a refurbed alternator on a exchange basis for arounf £70-80. Its very common the the IC regulator to go on the alternator and i believe Toyota no longer sell this as a seperate part.
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