Another MR2... Another project. The "BLACKRAT" Sw20

Want a thread dedicated to your car?
Got a seriously pimped-out ride? Building an extreme performance MR2? Post here!

Moderator: Moderators

Forum rules
This section of the forum is a great resource if you're looking for ideas, and it's a cool way of obtaining technical information that may otherwise not have been posted. (Members can use the Search functionality at top right of the forum to speed up finding things) Please respect others' contributions and don't diss anyone - keep comments helpful, factual, positive and polite. One thread per vehicle or owner please - don't start lots of threads about just one car. And if you need assistance with your car and want to host a spanner day, please use the appropriate section of the forum: viewforum.php?f=35 Thank you.
User avatar
Mr-Paulio
Area Coordinator - MR2OCNZ
Posts: 886
Joined: Sat Sep 06, 2014 6:48 am
Stomping Ground: Auckland
Prime Mover: AW11
First name: Paul

Re: Another MR2... Another project. The "BLACKRAT" Sw20

Postby Mr-Paulio » Sun Oct 06, 2019 1:49 pm

Okay, I am convinced now SW's are the worst cars to work on. Disconnecting an Alternator is easy. Getting it out without removing a drive shaft or the distributor etc. What a pain. And every time I work on this car my hands get cut to shreds! The AW is so much easier to get to everything. Even with a V6 and a turbo stuffed in there!

Anyway, I digress.... Rant over....

I am after a cheap used alternator if anyone can help? Mine has the round plug but I can modify the wiring if need be.
'89 AW11 3VZ-FE (Turbo? ((Soon)) :twisted:
'91 SW20 N/A #RatRod :lol:
'91 SW20 Turbo (Sold) :(
South Auckland Area Coordinator

User avatar
Benckj
Forum Moderator - MR2OCNZ
Posts: 6877
Joined: Thu Nov 24, 2005 12:44 pm
Stomping Ground: Otago
Prime Mover: More than one MR2
First name: Jim

Re: Another MR2... Another project. The "BLACKRAT" Sw20

Postby Benckj » Sun Oct 06, 2019 4:54 pm

Stop whining, you have a NA and alternator will come the top. It’s tight and may need to pull bracket but will come. The turbo is another matter especially if you have a custom exhaust like mine. Just about have to drop the motor to get alternator extracted.

BTW the most common fault with alternator is the rectifier. Can actually replace along with regulator and slop rings without pulling alternator out.
Jim Benck
90 rev 1 parts car
98 rev 5 GT- all the mods

User avatar
Mr-Paulio
Area Coordinator - MR2OCNZ
Posts: 886
Joined: Sat Sep 06, 2014 6:48 am
Stomping Ground: Auckland
Prime Mover: AW11
First name: Paul

Re: Another MR2... Another project. The "BLACKRAT" Sw20

Postby Mr-Paulio » Sun Oct 06, 2019 7:07 pm

Benckj wrote:Stop whining, you have a NA and alternator will come the top. It’s tight and may need to pull bracket but will come. The turbo is another matter especially if you have a custom exhaust like mine. Just about have to drop the motor to get alternator extracted.

BTW the most common fault with alternator is the rectifier. Can actually replace along with regulator and slop rings without pulling alternator out.

Haha, it's true though aye. I've worked on a few cars and the SW has always been a pain. The clutch I did in my turbo was shit too. And thats all the same stuff as in my AW and old GT4 which went smoothly.
And no you can't get the NA alternator up without taking the bracket off. I think the way I did it was easier though. Dragged it along the sub frame and bent the wiring harness out the way, dizzy cap and leads off. Charcoal canister and intake line off. Then it comes up, just. :lol:
'89 AW11 3VZ-FE (Turbo? ((Soon)) :twisted:
'91 SW20 N/A #RatRod :lol:
'91 SW20 Turbo (Sold) :(
South Auckland Area Coordinator

User avatar
ClanFever
Executive Officer - MR2OCNZ
Posts: 1782
Joined: Tue Sep 11, 2012 11:25 pm
Stomping Ground: Wellington
Prime Mover: SW20
First name: Olaf
Contact:

Re: Another MR2... Another project. The "BLACKRAT" Sw20

Postby ClanFever » Thu Oct 10, 2019 3:50 pm

I believe the larger alternator will not come out the top, but the smaller one will. Your car will have one of 23,000 different models so glad you got it out
Vice President & Wellington Area Coordinator
Current: 1992 Toyota MR2 G-Limited with Gen 2 3S-GTE + CT20B (APEXED), 1990 Toyota MR2 G-Limited (MEVSU), 1997 Sprinter Carib Z-Touring
Past: '91 G-Limited, '89 G-Limited, '91 NZ New MR2, '91 G-Limited, '99 Altezza 3SGE, '98 Altezza 1GFE, '88 Corolla, '96 Curren, '94 Ceres Corolla, '94 Levin, '90 Hiace Super Custom 4x4, '91 Mirage, '93 MX-6 J-Spec, '91 Familia, '91 Galant, '90 Navara, '96 Commodore, '94 Pajero, '89 Lancer, '93 Pajero, '92 Pajero, '89 Mirage, '92 Terrano, '87 Familia, '03 Colt, '91 Pajero, '91 Pajero

User avatar
Mr-Paulio
Area Coordinator - MR2OCNZ
Posts: 886
Joined: Sat Sep 06, 2014 6:48 am
Stomping Ground: Auckland
Prime Mover: AW11
First name: Paul

Re: Another MR2... Another project. The "BLACKRAT" Sw20

Postby Mr-Paulio » Thu Oct 10, 2019 8:51 pm

ClanFever wrote:I believe the larger alternator will not come out the top, but the smaller one will. Your car will have one of 23,000 different models so glad you got it out

Actually after closer investigation it seems the alternator is not a standard one. It looks to be modified to work, from another model. In fact, looks pretty close to a spare 3VZ one I have. So I may try and retro fit the 3VZ alt, more details to come. (Not Looking forward to getting it in there again though! ...So don't hold your breath)
'89 AW11 3VZ-FE (Turbo? ((Soon)) :twisted:
'91 SW20 N/A #RatRod :lol:
'91 SW20 Turbo (Sold) :(
South Auckland Area Coordinator

User avatar
GDII
Club Member - MR2OCNZ
Posts: 3888
Joined: Sun Jul 10, 2011 5:13 pm
Stomping Ground: Wellington
Prime Mover: SW20
First name: Phill

Re: Another MR2... Another project. The "BLACKRAT" Sw20

Postby GDII » Thu Oct 10, 2019 9:10 pm

Mr-Paulio wrote:
ClanFever wrote:I believe the larger alternator will not come out the top, but the smaller one will. Your car will have one of 23,000 different models so glad you got it out

Actually after closer investigation it seems the alternator is not a standard one. It looks to be modified to work, from another model. In fact, looks pretty close to a spare 3VZ one I have. So I may try and retro fit the 3VZ alt, more details to come. (Not Looking forward to getting it in there again though! ...So don't hold your breath)

Modified in what way?
1996 AE101 Corolla Sprint NZ New Daily
1990 SW20 MR2 G-Limited
2005 DY3 Demio
1990 EP81 Starlet XL (Sold)
1990 EE90 Corolla XL (Sold)
Instagram https://www.instagram.com/sw20glimited/

User avatar
Mr-Paulio
Area Coordinator - MR2OCNZ
Posts: 886
Joined: Sat Sep 06, 2014 6:48 am
Stomping Ground: Auckland
Prime Mover: AW11
First name: Paul

Re: Another MR2... Another project. The "BLACKRAT" Sw20

Postby Mr-Paulio » Fri Oct 11, 2019 3:06 pm

GDII wrote:Modified in what way?

The alt removed from my SW....
20191011_140012.jpg

That alt next to a 3VZ one.
20191011_140135.jpg
20191011_140139.jpg
'89 AW11 3VZ-FE (Turbo? ((Soon)) :twisted:
'91 SW20 N/A #RatRod :lol:
'91 SW20 Turbo (Sold) :(
South Auckland Area Coordinator

User avatar
GDII
Club Member - MR2OCNZ
Posts: 3888
Joined: Sun Jul 10, 2011 5:13 pm
Stomping Ground: Wellington
Prime Mover: SW20
First name: Phill

Re: Another MR2... Another project. The "BLACKRAT" Sw20

Postby GDII » Fri Oct 11, 2019 3:43 pm

Yip yip. Looks like your SW20 has the larger bracket or at some point this alternator was in a car with a large alternator bracket.
I assume you have a nut and bolt instead of just a nut holding it in place?
1996 AE101 Corolla Sprint NZ New Daily
1990 SW20 MR2 G-Limited
2005 DY3 Demio
1990 EP81 Starlet XL (Sold)
1990 EE90 Corolla XL (Sold)
Instagram https://www.instagram.com/sw20glimited/

User avatar
Mr-Paulio
Area Coordinator - MR2OCNZ
Posts: 886
Joined: Sat Sep 06, 2014 6:48 am
Stomping Ground: Auckland
Prime Mover: AW11
First name: Paul

Re: Another MR2... Another project. The "BLACKRAT" Sw20

Postby Mr-Paulio » Fri Oct 11, 2019 3:46 pm

Yes indeed.
'89 AW11 3VZ-FE (Turbo? ((Soon)) :twisted:
'91 SW20 N/A #RatRod :lol:
'91 SW20 Turbo (Sold) :(
South Auckland Area Coordinator

User avatar
GDII
Club Member - MR2OCNZ
Posts: 3888
Joined: Sun Jul 10, 2011 5:13 pm
Stomping Ground: Wellington
Prime Mover: SW20
First name: Phill

Re: Another MR2... Another project. The "BLACKRAT" Sw20

Postby GDII » Fri Oct 11, 2019 3:58 pm

It should have the small bracket on the engine based on the part numbers for that exact car. So to be sure when you put it back in see where the bolt ends up. Is it in the threaded part or the cut part? Just so you know what alternator to get of modify. a 14mm drill bit works too to make the holw bigger. It is an MR2 unit as it has a 4 rib pulley.

A big alternator will not come out the top unless you unbolt the bracket, shuffle stuff around then bolt the bracket back on and put it back. Almost easier to take off the subframe. Almost.
1996 AE101 Corolla Sprint NZ New Daily
1990 SW20 MR2 G-Limited
2005 DY3 Demio
1990 EP81 Starlet XL (Sold)
1990 EE90 Corolla XL (Sold)
Instagram https://www.instagram.com/sw20glimited/

User avatar
ClanFever
Executive Officer - MR2OCNZ
Posts: 1782
Joined: Tue Sep 11, 2012 11:25 pm
Stomping Ground: Wellington
Prime Mover: SW20
First name: Olaf
Contact:

Re: Another MR2... Another project. The "BLACKRAT" Sw20

Postby ClanFever » Sat Oct 12, 2019 10:27 pm

Get modding...
Attachments
70645171_650581455350974_3453102647412785152_n.jpg
70645171_650581455350974_3453102647412785152_n.jpg (120.83 KiB) Viewed 155 times
Vice President & Wellington Area Coordinator
Current: 1992 Toyota MR2 G-Limited with Gen 2 3S-GTE + CT20B (APEXED), 1990 Toyota MR2 G-Limited (MEVSU), 1997 Sprinter Carib Z-Touring
Past: '91 G-Limited, '89 G-Limited, '91 NZ New MR2, '91 G-Limited, '99 Altezza 3SGE, '98 Altezza 1GFE, '88 Corolla, '96 Curren, '94 Ceres Corolla, '94 Levin, '90 Hiace Super Custom 4x4, '91 Mirage, '93 MX-6 J-Spec, '91 Familia, '91 Galant, '90 Navara, '96 Commodore, '94 Pajero, '89 Lancer, '93 Pajero, '92 Pajero, '89 Mirage, '92 Terrano, '87 Familia, '03 Colt, '91 Pajero, '91 Pajero

User avatar
Mr-Paulio
Area Coordinator - MR2OCNZ
Posts: 886
Joined: Sat Sep 06, 2014 6:48 am
Stomping Ground: Auckland
Prime Mover: AW11
First name: Paul

Re: Another MR2... Another project. The "BLACKRAT" Sw20

Postby Mr-Paulio » Sat Nov 02, 2019 10:10 pm

So for reference, the 3VZ alternator does work in the 3SGE MR2. Same mod as above.... A bit of drilling. It also sits a little closer to the block. So I used a 810 belt as the 835 wouldn't get tight enough. Also the 3vz has a 5 rib pulley (if you forget to swap it and don't want to wiggle that alternator back out again.... like me) But you can still use the 4 rib. It's just harder to get on as it sits close to the frame.
20191026_173531.jpg

All working now. Next issue was the engine wouldn't shut off with the ignition and even with the key out! Didn't take long to research this was the issue!
This guy....
20191101_155617.jpg

Unplugged it and sweet as. I guess this is the engine bay cooling fan controller? As the radiator fans (both now wired to the radiator circuit, as no AC... #racecar!) Still work. Took it for a drive and no more issues?... So far anyway.... Maybe I've got rid of all the rats...?
20191028_130549.jpg

:lol: :lol:

Must be time I organise another south auck club run soon? :D
20191102_140900.jpg
'89 AW11 3VZ-FE (Turbo? ((Soon)) :twisted:
'91 SW20 N/A #RatRod :lol:
'91 SW20 Turbo (Sold) :(
South Auckland Area Coordinator

User avatar
GDII
Club Member - MR2OCNZ
Posts: 3888
Joined: Sun Jul 10, 2011 5:13 pm
Stomping Ground: Wellington
Prime Mover: SW20
First name: Phill

Re: Another MR2... Another project. The "BLACKRAT" Sw20

Postby GDII » Sun Nov 03, 2019 6:51 am

Interesting why that controller causes the engine to continue running. It's not connected to the other fan system in any way so that's fine to remove.

However it is connected onto the alternator wiring with the Black w/Yellow wire. Something isn't right somewhere in that circuit. That's the same wire that is connected to the alternator regulator. Hopefully that helps you.
1996 AE101 Corolla Sprint NZ New Daily
1990 SW20 MR2 G-Limited
2005 DY3 Demio
1990 EP81 Starlet XL (Sold)
1990 EE90 Corolla XL (Sold)
Instagram https://www.instagram.com/sw20glimited/

User avatar
Mr-Paulio
Area Coordinator - MR2OCNZ
Posts: 886
Joined: Sat Sep 06, 2014 6:48 am
Stomping Ground: Auckland
Prime Mover: AW11
First name: Paul

Re: Another MR2... Another project. The "BLACKRAT" Sw20

Postby Mr-Paulio » Sun Nov 03, 2019 8:41 am

Yeah seemed odd. That's why initially I thought radiator fan system. When I switched the ignition off and the engine stayed running. All the fans came on also. It's not a safety that stops you turning the engine off with high temp? I was quite surprised after removing it that the radiator fans still cycled on temperature. I though I'd have to unplug the sensor and run them all the time. But I found online some one with the same problem found it was this controller. So I unplugged it, and it worked!
What fans does it operate then?
'89 AW11 3VZ-FE (Turbo? ((Soon)) :twisted:
'91 SW20 N/A #RatRod :lol:
'91 SW20 Turbo (Sold) :(
South Auckland Area Coordinator

User avatar
GDII
Club Member - MR2OCNZ
Posts: 3888
Joined: Sun Jul 10, 2011 5:13 pm
Stomping Ground: Wellington
Prime Mover: SW20
First name: Phill

Re: Another MR2... Another project. The "BLACKRAT" Sw20

Postby GDII » Sun Nov 03, 2019 9:30 am

The controller only operates the engine bay fan or intercooler fan in turbo models. The temp sensor on the engine lid controls when the fan comes on, not coolant.

This circuit also provides power the the reverse light switch and the electronic speedo if the car was newer. So it's odd that the controller is keeping things going as this Black w/Yellow wire seems to power a lot of things and the controller is just on the end of one of the wires. Maybe a bad earth. The one on the intake manifold.

Screenshot_20191103-093030.png
Screenshot_20191103-093030.png (139.98 KiB) Viewed 49 times


Screenshot_20191103-093045.png
Screenshot_20191103-093045.png (142.11 KiB) Viewed 49 times
Last edited by GDII on Sun Nov 03, 2019 9:39 am, edited 2 times in total.
1996 AE101 Corolla Sprint NZ New Daily
1990 SW20 MR2 G-Limited
2005 DY3 Demio
1990 EP81 Starlet XL (Sold)
1990 EE90 Corolla XL (Sold)
Instagram https://www.instagram.com/sw20glimited/