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ea81 - ea82 5sp conversion, flywheel?


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13 replies to this topic

#1 Phizinza

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Posted 30 September 2008 - 08:26 PM

When putting the 5sp d/r on an EA81 engine what has to be done the the flywheel?
The EA81 in question has the 225mm flywheel size same as EA82's. So could I just use the friction plate from the EA82 in the EA81's pressure plate and flywheel? Why would that not work? I've read the EA82's flywheel either needs to be modified to fit or the EA81's flywheel needs machining down?

#2 monstaru

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Posted 30 September 2008 - 08:32 PM

i swear i just used an ea82 flywheel with disc and plate.because they had the same bolt pattern. it has been a while since i tackled that one,but i am sure someone smarter than me will chime in.:grin:cheers, brian

#3 Phizinza

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Posted 30 September 2008 - 08:41 PM

When I done my EJ conversion I swear my EA81 flywheel and EA82 flywheels had different bolt patterns to the crank that is. Ended up just using EJ stuff on the conversion so thats why I'm not 100% sure.

#4 Jerry DeMoss

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Posted 30 September 2008 - 08:44 PM

What I used when doing the 5spd swap into the ea81t coupe I used the larger ea81 flywheel and a ea82 clutch disk with the ea81 pressure plate and ea82 thow out bearing. Sounds like a big mix of mischief but it works really well. The only other thing I did was shim the ea81 starter with some thin shim washers about 1mm to make it mate up with the ea82 trans better.

#5 Phizinza

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Posted 30 September 2008 - 08:48 PM

Cool, I thought it should be that easy but some "know it all" on another forum said other wise..
Thanks!

#6 VaporTrail

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Posted 30 September 2008 - 09:45 PM

I have:

ea82 flywheel turned to xt6 specs, ea82/xt6 clutch disc, xt6 pressure plate.

the bolt holes are slightly larger in the ea82 flywheel, but since it's centers on the end of the crank, it does not create any issues. locktighted down. I've not had any issues....

#7 Phizinza

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Posted 30 September 2008 - 10:32 PM

So McBrat did you have to grind or drill out the flywheel at all?

#8 The Beast I Drive

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Posted 30 September 2008 - 10:59 PM

I too used the EA82 flywheel, no modification to the wheel needed, but I had to cut a little bit of aluminum off the block down where the cover plate on the bottom of the bellhousing is. I used the EA82 piece cuz I couldnt get my clutch to fully engage with the EA81 piece.

#9 carfreak85

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Posted 01 October 2008 - 12:19 AM

If you're EA81 was a manual, you will need to remove some material on the engine side bell-housing. If the car is or the engine was an automatic, the bell-housing will be larger to fit the torque converter.

I used the same mix of parts as TheBeastIDrive and McBrat, but I did have problems with the bolt holes in the EA82 flywheel being too big. I had to install shims to keep the flywheel from knocking around.

If I were to do it again (Which I will when the RX trans goes in) I would use an aftermarket lightweight flywheel off a WRX modded to fit my EA81 and possibly the WRX clutch if the EA throw out bearing will work. Barring that, I would turn the stock flywheel and get a heavy-duty aftermarket XT6 clutch kit.

#10 bratman18

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Posted 01 October 2008 - 03:42 PM

I can't remember exactly what I did but I had mine machined!

#11 XT6 Magic

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Posted 04 October 2008 - 01:56 PM

I am doing the same swap on my 83 GL Wagon from a 3AT to 5 speed. Last week I swapped out the pedal box, that wasn't too bad. Yesterday I put the Hill Holder in. What a pain! All of the steel lines under the hood were different and had to be swapped. I'm glad that part is over with. Next step will be the radius arm brackets.
-Jeff

#12 Phizinza

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Posted 04 October 2008 - 05:56 PM

Yeah, I'm not going to bother with hill holders or what not I'm just going to swap in the box. I've made a custom gearbox crossmember before when I put my FT4WD/EJ/1.59low box in my Brat/Brumby. So that won't be an issue, its pretty easy. And My brother is going to help me out making a 1 piece shaft for the box (he done both of his propshafts on his 4runner when he stuck a second transfer case in it).

#13 XT6 Magic

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Posted 05 October 2008 - 07:56 AM

Just thinking here as I am getting ready for the swap soon. I already have the Large Brat 8 7/8 EA81 flywheel but no clutch parts yet. I also have a complete XT6 Flywheel pressure plate disc ect that all match.

Could I just use the complete XT6 flywheel and clutch (with helicoil spacers and the EA81 flywheel bolts) and a Dual Range?

Other option is just stick to the original plan and get the large EA81 Brat GL pressure plate and the EA82 24 spline disc from a Wagon.


Opinions?

Thanks,
-Jeff

#14 monstaru

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Posted 05 October 2008 - 11:45 AM

mcbrat says,

"ea82 flywheel turned to xt6 specs, ea82/xt6 clutch disc, xt6 pressure plate."

so i am guessing yes..;)........cheers, brian




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