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Location:
Ipswich
Registered:
July 2002
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Location:
Brisbane
Registered:
June 2003
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Location:
Ipswich
Registered:
July 2002
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Re: MA70 thermo fans
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Sat, 20 September 2003 10:31
 
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Both the ac fan and the radiator one. I have nt seen either in operation.
Aren't these fans conectted to some type of ecu.
Would direct powering them be safe and not damage anything???
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Location:
Brisbane
Registered:
June 2003
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Re: MA70 thermo fans
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Sat, 20 September 2003 11:04
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just disconnect them from the normal power source (plug/ wiring to wherever it goes) and plug a direct +- signal from the battery. Its in no way harmful to the fans. They wouldnt be hooked up to the ecu, as they're thermally controlled from a sensor switch - much like all cars today running thermo fans.
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Location:
Melbourne
Registered:
May 2002
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Re: MA70 thermo fans
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Mon, 22 September 2003 01:39
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| Helmann wrote on Sat, 20 September 2003 17:55 |
Anyone know how to get the thermo fans on a mkiii supra going to make sure they are working.
Car is overheating and i don't think they are kicking in at all to help cool it.
Is there a way to get them running at idle to make sure they work???
Brett.
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Mate i would be worryed about that if i was you! if the engine fan alone will not cool the engine you dont want to know what that could meen!
Allan
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Location:
Sydney
Registered:
July 2002
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Re: MA70 thermo fans
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Mon, 22 September 2003 01:45
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My radiator was blocked 80% no shit. Seriously if its not the <whisper>head gasket</whisper> then go and get your radiator serviced properly - take it out of the car yourself and around to a radiator place, they take the tanks off and shove rods down it or something like that, not just a chemical clean! I think it cost me $80(can't remember though), and now its absolutely beautiful!! My two little fans have crapped out, but the big thermo one is enough to cool the 4L beast. The radiator place was shocked, they said it would cost another $50 to get them to remove it (they were also worried about my wiring/different engine). I drove it around the corner and was back within 10 minutes (5 minute walk). They couldn't believe it was the same radiator, took me a few minutes to convice them.
I say this to every MA70 owner, get your radiator serviced. Will save a headache. Good for peace of mind.
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Location:
Ipswich
Registered:
July 2002
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Location:
Adelaide, SA
Registered:
May 2002
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Re: Blown Head Gasket !!!!
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Mon, 22 September 2003 06:45
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From the pic it looks like you have a post '88 supra, so it won't be too bad. A lot of stuff will bolt straight in - the only body modding I had to do was to fit the p/s cooling line (enlarge existing hole).
I was actually surprised how many times I went to bolt a jza part in my ma70 and the bolt hole (with captive nut) was already there, just unused or covered by a plug.
Wiring it all up nicely is a different story though. Also you'll probably find heaps of little problems (like shitty/cracked engine mounts) that you'll need to fix along the way. Factor in the time to remove the enging from the half-cut and your car too - unplugging everything and making sure it doesn't get damaged when the engine goes in.
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Location:
Ipswich
Registered:
July 2002
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Re: Blown Head Gasket !!!!
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Mon, 22 September 2003 07:23
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Will all the electrical plug behind the firewall be the same or will i need to do some rewiring???
My ma70 is a nov 88 model. First of the revised ones.
I know that i will definately have to swap the crossmember over.
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Location:
Brisbane
Registered:
June 2003
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Re: Blown Head Gasket !!!!
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Mon, 22 September 2003 07:36
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Dude do not run chemi-weld for too long, its not ideal for the engines parts!
If its concerning you greatly - Do you want to bring it to the southside, and i can give you a hand checking the thermos and cooling system? Pm me if you want to go further.
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Location:
Malaysia,Kuala Lumpur
Registered:
July 2002
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Re: Blown Head Gasket !!!!
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Mon, 22 September 2003 07:42
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I've a 1G-TT. The Electrical/Mini Fan behind the Radiator, come on at the same time when the thermal switch activates them. IF it's not a bad switch, then a fuse or relay has died. Take care in finding the cause.
cheers
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Location:
Ipswich
Registered:
July 2002
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Re: Blown Head Gasket !!!!
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Mon, 22 September 2003 20:46
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I just wanna prolong the engines life a extra week or two.
Am talking to bank today or tomorrow and hopefully will get some extra money and 1j my baby.
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Location:
Adelaide, SA
Registered:
May 2002
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Re: Blown Head Gasket !!!!
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Mon, 22 September 2003 23:07
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You will have to do some re-wiring to make sure the 1jz ECU is getting the signals from the speedo, aircon etc. If you get a jza70 front cut (the only way to go) then you can graft the jza underdash plugs onto the exisiting ma70 loom (and you shouldn't need to cut any plugs off the ma70 if your electrician is any good). If you car has TEMS you need to get those outputs from the ecu as well. Depending on your dash, you might need to change the tacho as well.
All this is not impossible considering the wealth of info on the forum these days, and there is a site where all the jza-70 pinouts are listed (can't remember it though). Also under the bonnet will need some re-wiring to fit the jza-70 main fuse box etc. My car (was NA ma70) needed to use the jza-70 air-con compressor as well. Consider fitting a remote oil filter (and cooler) kit when you put the engine in too, changing it on the 1jz is a bitch of a job.
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Location:
Sydney
Registered:
March 2003
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Re: Blown Head Gasket !!!!
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Tue, 23 September 2003 04:55
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Being an 88 model, It's a simple case of swapping the whole thing over, engine, crossmember, engine wiring and chassis wiring loom - minor soldering is required.
Wastegate off these forums has done the swap, he'll be able to supply more detailed information than me as I've only done the 2J swap.
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Location:
Ipswich
Registered:
July 2002
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Re: Blown Head Gasket !!!!
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Tue, 23 September 2003 06:36
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If the dash from the front cut is the same as mine, should i not be able to swap all the dash as well so all connectors are the proper ones? ie. no soldering.
Then it would simply be a case of undo all bolts and take out everthing from front cut and put it all in the original.
Then turn ket and drive.
Also i have heard that jza70 intercoolers are bigger? Is that true?
What about the radiator, is that bigger too?
And aren't the front disc 330mm instead of 300mm on the MA70?
About what sorta price should i expect to pay for the front cut with low kms and an auto???
Thanx all, Brett.
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Location:
Gold Coast
Registered:
May 2002
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Re: Blown Head Gasket !!!!
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Tue, 23 September 2003 06:57
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Yes if you change the dash and wiring on the dash and behind the dash then it will be a plug and play affair. It's a hell of alot of work though! I did it this way. Ripped out all my dash and rewired the whole lot from the front cut. If you have tems shocks anymore it's a good time to rip out all the wiring for that as well.
Yes the JZA70 Intercoolers are bigger.
But it doesn't make up for how shit they are.
JZA70 OEM Cooler is:
550mm Wide
330mm High
70mm Deep
55mm Piping
MA70 OEM Cooler is:
470mm Wide
300mm High
60mm Deep
45mm Piping
Some Comparisons photos I took:
Radiator is the same size and thickness, however the top and bottom are alittle different. Takes a different rad cap too.
Brake discs are the same, some people that don't know what they are talking about "beleive" the R Spec JZA70 has bigger rotors. The JZA70 R Spec I got for a front cut had the very same rotors as my Aus Spec MA71.
For an Auto I wouldn't pay anymore than $2500.
I paid $3500 + shipping for my JZA70 R Manual.
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Location:
Ipswich
Registered:
July 2002
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Re: Blown Head Gasket !!!!
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Tue, 23 September 2003 07:13
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Wastegate, where did u get your front cut from?
Also would u be willing to help if i get stuck? (usual payment in beer of course).
Actually that offer is open to anyone who knows what they are doing?
I was planning of respraying the engine bay and interior bits and pieces at the same time so taking out the dash will be the way i go anyway.
With a twin turbo setup do u need twin bleed values?
I don't have tems shocks anymore. Got koni yellows in there but the tems ecu is still instaled (works like a trash meter).
I don't have the strut top controllers either.
Brett.
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Location:
Gold Coast
Registered:
May 2002
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Re: Blown Head Gasket !!!!
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Tue, 23 September 2003 07:39
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Yeah I can help out if you need it.
Don't think you will need a bleed valve, not yet anyway  but you run one bleed valve that Tees off to the two actuators.
Well if you are terring out the interior you may aswell get rid off the wiring and computer for the tems too (dead weight). You don't use those back speakers do you?
I got my cut from Jap Parts in Adelaide in the end very good service. But if I was to do it again I would deal with Rolin on the Coast, less hassles for interstate and you can see the cut yourself. They have sold 4 frontcuts to my friends now and are all happy.
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Location:
Ipswich
Registered:
July 2002
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Re: Blown Head Gasket !!!!
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Tue, 23 September 2003 08:29
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Heard lots of good stuff about rollin but checked thier web site yesterday and they did not list any jza70 auto cuts.
Have heard they dont do many auto cuts.
I might have a line on a mates rates jza70 auto cut as it is. (fingers crossed for steve!)
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