12A Fly Wheel
 

Gotta remove fly wheel on engines and swap them, what size exactly is the nut, and what wrench or tool will work best to remove it?

54 mm I believe... do a search to make sure.

2 1/8 socket, 3/4 inch drive and a big fuggin cheater bar.

Good Luck,
-- Alex

If the engines are out, I recomend taking them in the back of a truck to a equipment rental yard. For $10.00, (once for free), they removed the nut with a Tractor Trailler compressor. That is what I do.

Never mind then

:)

im pretty sure its 2 1/8

it's 54mm, and a lot of force :)

lol, thanks all I will give it a try.....*sigh*

2 1/8" socket, and the Jesus Gun.... 1500# impact gun. You need it to remove the Jesus Nut... the nut that holds the flywheel on.

It's easy with an impact gun and a 2 1/8" socket. Don't forget the flywheel locker, but it's not 100% necessary.

2 1/8" fits the 54mm nut just fine.

You need a real good size compressor to get that nut off, dont be fooled. Not just any impact gun will do it. It is the force behind that gun that drives the nut off. You can do it by hand, you just need the 54mm and a 3 foot bar and lock the flywheel.

I was blessed by the actual Mazda tools to be given to me when I bought my street port. But yea, tightening that thing is a bitch by hand, even with the tools.

Anybody want to see the tool once sold by Rotary Engineering that only takes 30lbs of force to take the nut off.


I got one and it works like butter....

John

Rotary Engineering had some cool things. I have a set of 10+ year old glasspacks that can handle a rotary's hot exhaust. They're used and still muffle. Amazing.

Yes, I'd like to see your tool lol.

I just did the seazed engine bye hand, with a huge freakin cheater bar.....I bolted the engine to one of my work tables. It worked well. What can I use to lock the fly wheel from moving? Is there some special mazda tool to hold it with out hurting it?

Yea, Mazda make a bar to hold it. All it is, is a 1/4" thick piece of steel with 2 holes drilled in it to bolt where the pressure plate would. About 3' long.

Have you seen the cool little flywheel locker that Mazdatrix sells? They take a piece of a flywheel ring gear and weld on two steel tubes. These tubes house two 10mm x 1.25 bolts which screw into the upper bellhousing bolt holes and holds the flywheel for torquing clutch bolts and etc. It's a nice little tool to use.

i want to see it!!

There was a guy on The Parts Trader selling 54mm nuts for $12.95 shipped.

Ok here is 'the tool'


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http://www.rxparts.com/images/parts/flywheel_nutx.jpg


Rotary Engineering used to sell them, long ago. It takes less than 40 ft. lbs. of torque to remove the 54mm flywheel nut.


John

Neat.

thats sweet!

how much was it?

me and a friend combined this design with the wrench that RB sells. it is its own flywheel stop, don't even need to have another person hold the engine.

Very nice! If there was ever a patent on it, I'm sure it's expired by now. Scalli or somebody needs to make these!

Thats a really neat idea ... its a 10/10 for simplicity and function !