Do i need a new flywheel (replacing clutch)?

[Alpinweiße30]

well if you insist...or are you telling me this just because you want to get rid of it? but seriously PM me with price and we can figure out shipping and such.

[browntown]

If this is your only car, you're not up to the motronic swap-aroo, just replace the clutch and leave the fly wheel alone. If its not broke don't fix it. Ideally though you would get a single mass flywheel with the reference sensors

[StereoInstaller1]

well if you insist...or are you telling me this just because you want to get rid of it? but seriously PM me with price and we can figure out shipping and such.

No, I would rather not sell it, nor do I wanna ship it. See if you can find one local, I will be 4th option, OK?

How does $100 + shipping sound? I have no clue what flywheels are worth.

[Rigmaster]

I have never seen this rubber part you talk about in the twin mass eta flywheel, so I'm having trouble believing that it exists.

Got any hard proof that a the twin mass flywheel is anything more than a big hunk of metal that weighs 2x as much as a single mass????


I know there are some other flywheels that DO have 2 separate parts with rubber between them to absorb shock, but I am fairly sure that is NOT the case with the eta Twin mass flywheel.


Discuss amongst yourselves- I really would like to get to the bottom of this.


;)



EDIT:

http://www.e30tech.com/forum/showthread.php?t=20402

Now, this looks like it IS 2 separate pieces, but it's got springs that buffer the pulses, not rubber (though I guess there is probably some rubber in there so it's not metal to metal).

I'll just say that I've NEVER pulled a flywheel like this out of a car, and I've parted/worked on a BUNCH of E30's. I am waffling on my statement that this doesn't exist- but I'll just say I've never seen it with my own eyes. ;)

What I consider to be a "twin mass" eta flywheel is simply a heavy-ass 1 piece flywheel- the weight of the flywheel was designed to keep the engine revving and make it smooth. This is different than the single mass flywheel, and what I would call the "Dual mass" flywheel as seen in the pics at the E30tech link above.



I'd really like for someone to confirm or deny this.

[StereoInstaller1]

Gotta love that...I have seen 3 E30 flywheels and 2 were as pictured.

[Eric Giles]

ETA flywheels are definitely true twin-mass flywheels with two metal surfaces that held together with a spring/rubber combination. I've pulled one myself. Another tidbit of info...

Luk/Sachs shows they have a twin mass flywheel for the ETA cars-and they do, BUT-they no longer make the ones with the metal 'pin' or block that the reference sensor needs to read to run properly. I found this out a couple of years ago and it caused me a great deal of wasted time before I double checked and found that the new flywheel didn't have that piece of metal. After calling Luk US headquarters and talking to the head guys there, they did some research and verified they no longer made the dual-mass flywheel with the reference sensor pin, and at the time there were none in their inventory.

Luckily, I hadn't thrown away the old flywheel, so I did what I normally do-I took some 320 grit sandpaper and scuffed the flywheel surface by hand. As long as the flywheel surface isn't burned or scored, this method will and has worked fine.

So, save your money and time-just use some sandpaper on the old flywheel and you should be fine.

[Alpinweiße30]

I took some 320 grit sandpaper and scuffed the flywheel surface by hand. As long as the flywheel surface isn't burned or scored, this method will and has worked fine.

So, save your money and time-just use some sandpaper on the old flywheel and you should be fine.

That works for me!

[lateracer]

So, save your money and time-just use some sandpaper on the old flywheel and you should be fine.

x2 - on sand paper surface prep. I did that with minimal break in on my eta and then threw it on the track for two long days of abuse.

When the twin mass assembly starts to go South, it will make a kind of clunking/shuddering noise when the motor gets turned off that sounds very similar to run on (aka dieseling). You'll definitely notice it as it will be the last noise the motor makes when it's turned off. It will do that for quite a while before actually failing.

Upgrading to a 1.3 system isn't a bad idea, especially if you've got long term plans for the car. Swapping to a newer motor will be a lot easier if you've already got that in place. If you do decide to stay with the flywheel reference sensor system, be sure to tack weld the little magnet in place while the flywheel is out. It can pop out, and when it does, there's no quick fix.

[Alpinweiße30]

Do you have a picture of where this sensor needs to be welded? I have a welder so i can do it. Unless this is obvious when i take it all apart a picture would help.

[lateracer]

Do you have a picture of where this sensor needs to be welded? I have a welder so i can do it. Unless this is obvious when i take it all apart a picture would help.

I tried taking a picture of it when I did it, but it just didn't come out well (hood off, daylight shining down, camera pointing up at the bottom of the flywheel...all shadows). This illustration probably explains it a little better anyway.


The yellow is the flywheel, the black square is the reference indicator magnet. The little magnet is a square peg that is pressed into a square hole. It's the only square looking thing you'll see along the side of the flywheel. The red stuff represents what my tack-welds look like.

Literally a 30 second job. I'm pretty sure you can do this without pulling the trans (I pulled mine during this work to do a clutch, so I'm not 100% sure). If you pull the bottom flywheel cover and bump the motor, you'll see it come around at some point.

[accident]

i had my dual-mass resurfaced. it cost me like $30 and took them half an hour. just sayin'

[Alpinweiße30]

Because there was a debate about the flywheel and what it might look like. THIS is what it looks like.













I am going to go with the sand paper method because i think it looks pretty good.

by the way i do not see this magnet you speak of, and the clutch wasn't "bad" the rear main seal is bad and it was leaking and getting oil onto the clutch which was making it slip.

[lateracer]

I assumed you had a motronic 1.0 like i did. Does your car have the two sensors that plug in to the side of the transmission near the slave cylinder?

If yes, then there will be a little magnet along the side of the flywheel.

If no transmission sensors, then nevermind. It's a problem you don't have.

[Alpinweiße30]

i do have those sensors....I do not see a magnet???? it appears the clutch ( at least) has been replaced. is there a chance someone else replaced the flywheel without a magnet?

[accident]

no, without the magnet the sensors have nothing to read and the car wont run