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-   -   How do i balance the replacement flywheel? (http://www.peachparts.com/shopforum/diesel-discussion/357221-how-do-i-balance-replacement-flywheel.html)

interzonearts 07-11-2014 09:59 PM

Thanks a lot
 
Lot's of helpful info guys.

97 SL320 07-12-2014 09:17 AM

I see others have jumped into the fray. Yep, find heavy point on both, put them back to back 180 out then take weight off the new FW.

Another way is to bolt weight to the old FW until it is zero balance then transfer to the weight to new, drill new until zero balance, remove bolt on weight and you will have 2 matching FW.

junqueyardjim 07-12-2014 01:34 PM

Well you do like them as correct as they can be. Yet I think way to much time and effort is spent worrying about the balance point on the flywheel. Look it over good and if you see a factory check mark on it, get it balanced. I had the choice of two 240D flywheels. No mark on either, I picked the one that I thought was just a hair smoother of the surface and went with it. No marks, no balance, new flywheel screw bolts and on with it. Works perfect! Do get some vibes from those cylinders when firing at 2000 rpm and 10 pounds boost in the winter especially. Everything is cold and noises seem to be greater. In warmer weather, with a window or two open a bit, it is perfect. If I wanted it smoother, I would have used the old Mercedes Benz trick of leaving an old fashion grease ball transmission in it. Then I had a problem with the drive shaft. The tech school that shortened it for me does it free and they made it an interference fit. But it wasn't strong enough and under a hard torque load is 1st gear it would slip. So now I drilled I think 12 small holes into the slip area and put in 12 #10 stainless sheet metal screws. I did this with the shaft on the car so it is not perfect, but it does carry the load without complaint and no vibration. I really like the car with the 4 speed, really love to drive it. But I can easily see why MB did not offer the W123 with the 3.0 turbo diesel and the 4 speed. It just has an inherent vibe in it that they knew the North American car buyer would not be happy with. So if you have a 4 speed you love it and live with it.

t walgamuth 07-12-2014 01:38 PM

Quote:

Originally Posted by junqueyardjim (Post 3357452)
Well you do like them as correct as they can be. Yet I think way to much time and effort is spent worrying about the balance point on the flywheel. Look it over good and if you see a factory check mark on it, get it balanced. I had the choice of two 240D flywheels. No mark on either, I picked the one that I thought was just a hair smoother of the surface and went with it. No marks, no balance, new flywheel screw bolts and on with it. Works perfect! Do get some vibes from those cylinders when firing at 2000 rpm and 10 pounds boost in the winter especially. Everything is cold and noises seem to be greater. In warmer weather, with a window or two open a bit, it is perfect. If I wanted it smoother, I would have used the old Mercedes Benz trick of leaving an old fashion grease ball transmission in it. Then I had a problem with the drive shaft. The tech school that shortened it for me does it free and they made it an interference fit. But it wasn't strong enough and under a hard torque load is 1st gear it would slip. So now I drilled I think 12 small holes into the slip area and put in 12 #10 stainless sheet metal screws. I did this with the shaft on the car so it is not perfect, but it does carry the load without complaint and no vibration. I really like the car with the 4 speed, really love to drive it. But I can easily see why MB did not offer the W123 with the 3.0 turbo diesel and the 4 speed. It just has an inherent vibe in it that they knew the North American car buyer would not be happy with. So if you have a 4 speed you love it and live with it.

The 240 fw are generally neutral but not all of the 617 cranks are neutral.....not all the 280e cranks are neutral either.


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