The guy at the machine shop I go to did mine not too long ago. I however was not there to see it.

I would say pictures, pictures and more pictures as I would be taking it apart.

But thats just me.

-Art

 

yup, planning to take photos as i go to reference as it goes back together. hopefully it goes back together right.

also... i've seen some people remove the cruise control bracket on the throttle body... if anyone knows how to do that please let me know! i'll try to do some digging on that as well.

 

the one thing you will find out is that you have to drill out the "rivets" that hold the butterfly to the shaft and when it goes back together, you have to come up with a new fastener, one that you can doll down flat with a punch.

 

ugh, are you sure thats required on the supra specifically? i know it is on some cars, and isn't on others.
i have no idea but was hoping it was not the case here.

 

unfortunatly so buddy.......and i wouldnt advise on screws because there is a chance that they may come out.

 

I did it this last week. It was a bitch. Honestly I wouldn't waste my time doing it again.

 

You can drill out the fasteners for the butterfly and then put in some screws to hold it together once again.

Josh and I have them done at the same place and thats what the guy did.. I can find out for you what and where he got the if you'd like?

-Art

 

I agree with natedawg. The screws holding the butterfly blade screws are almost guaranteed to not budge.

DP

 

shame they dont just thread in with loctite and thats that.
why did you guys take yours apart, and yeah if you can let me know what he did to put them back together i'd really appreciate it. i was trying to take this apart tonight but looks like i might not be able to. i do have to do it in the next few days for sure though.

i'm taking it apart to have chromed locally, in case you were wondering.

 

I've got to have this thing apart by tomorrow, unfortunately I'm on a tight time schedule here. If anyone can provide any more info here or can suggest who I can ask or where I can find out about the proper way to do this it would be greatly appreciated.

 

how about removing everything but the butterfly? I doubt any chrome will get there or interfere with the movement of the butterfly if it's not preped for chroming, we did it this way on my friends car long time ago and not a single problem

 

i'd love to do that, but am not sure its an option. i'm trying to get some more info about it, but if anyone has anything else to contribute, please let me know thanks!

 

what do you mean not an option? leave it or remove it as easy as that lol

 

i tore mine down recently and removed all trac system components and shaved the throttle body. The screws in the butterfly will NOT come out and will need to be drilled. I have some pics of the process but will have to find them. It was sorta step by step and might be of some help.

 

awesome, thanks. what did you put back in to replace the screws?

i just talked to a really helpful machine shop who did this for artbran and flintstonekid... the shop is too far away for me to drop off and pick up (need it done quickly), but he was really helpful in explaining the process.
he drills the screws out carefully, and replaces with new screws, loctite, and stakes the end of the screw so it doesnt budge, just like factory.
i'm going to see if my local machine shop can take care of that for me and hopefully without any delay.
ugh, i had modding on a time constraint...

 

hammer

 

excerpt from my build journal:

So, with no time to waste, this weekend I pulled off the pieces I want to have refinished. I was up in the air between polishing and chrome but after talking to quite a few people about it I think I'll be happier with the long term condition of chrome over polishing. I'm on a tight time schedule to get everything done and have been pretty dedicated this week to planning, organizing, and executing.

Most of this was pretty straightforward, however the big bear of all of this was stripping down the throttle body to its bare housing. This wouldn't have been necessary for polishing, but the chroming process involves dipping the parts in some pretty harsh chemicals so any seals or other materials that could be damaged need to be removed first.

I took photos throughout the process but to be honest, I'm nervous for the day I have to put the throttle body back together. I've got a few dozen loose pieces now which all have to be assembled and arranged properly, springs that have to be preloaded, sensors that have to be calibrated... ugh.

On top of this, I had to remove the throttle plate, rod, and seals as the last step, which I am happy to say I completed tonight (with some much appreciated help from Ivan and Antony) but it was kinda sorta a bitch. I had attempted to follow the advice of some machine shops on disassembly, but no luck. Ended up drilling out the 2 screws holding in the throttle plate very carefully as not to damage the threads on the throttle rod, and now I'll have to find replacement screws for reassembly.

Ok, enough talk. Just figured I'd explain the process for my own documentation, and for anyone else's twisted interest. Keep posted for some shiny things coming up in the near future, and one more piece of purple flare too.

Here are some of the photos of the process, not terribly exciting but whatevs...

Here are the parts destined for chroming (edit: i'm polishing everything now due to complications in chroming, so i didnt need to take the throttle plate out! damnit... oh well)

Starting out and taking photos as I went...

nerve racking... dont mess up! if you look close you can see one bolt head carefully drilled off, and the other part way there. hint: 9/64 bit is a winner for this one, and easy does it. don't drill too deep, you can't go past halfway through the rod where the threads start.

this makes it look all too quick and easy, but here's the finished product after getting the throttle plate and rod out, and pulling the rubber seals.

 

Great write up TROLL, keep up the great work! I believe alot of people are using the work you have completed to motivate them selves to work on their own cars!

Adam

 

yeahh definatlyy great write up dude !!

 

nice!...decided not to use a hammer,eh? lol

 

Do you need to pull the butterfly out if you just want to hand polish the TB?

 

nope, i would highly recommend keeping the throttle plate in place to polish it. just take off what brackets are necessary to get access to what you need and go to town.
for chroming however i would highly recommend taking it apart completely. some chromers don't do this but i would make sure it is done because the chemicals used in the chroming process are very corrosive and they may cause damage to the rubber seals on the throttle shaft. they may not fail immediately but the chances of them failing prematurely are much higher, creating a vac/boost leak around the rod.

 

Sorry to revive an old thread. What size screw did you guys use after drilling the brass screws out and removing the butterfly?