BMW C400 GT (2020) Roller Weights

[Oigy]

Can anyone tell me the stock weights in a BMW C400 GT made in 2020? I have been reasearching the Webs and am finding conflicting information. Short of opening it up and measuring and wieghing them, would be great to know the sizes. Just want to get a set before I open it up as a spare/replacement if required . Many thanks, cheers Oigy

 

[wspollack]

Can anyone tell me the stock weights in a BMW C400 GT made in 2020? I have been reasearching the Webs and am finding conflicting information. Short of opening it up and measuring and wieghing them, would be great to know the sizes. Just want to get a set before I open it up as a spare/replacement if required . Many thanks, cheers Oigy

Disclaimer: I have no personal experience with the rollers, never taken the CVT apart, don't intend to, etc.

However: If I were a betting man, I'd bet on 18 grams.

Here's why:

1) I went to the parts fiche page of Max BMW. (I imagine other Beemer sites have this same info, but I'm used to searching for items on the Max site. That's a four-location BMW dealership, and one of those places is near me, and where I bought my C 400 GT and where I get it serviced.)

Both the up-to-2020 and the after-2020 pages for the C 400 GT show the same part number for the rollers: 24 81 8 405 745





2) Doing a search for that part number reveals a lot of page titles that also include this 18-gram information:



Hence, my conclusion that they're 18 grams.

 

[Oigy]

Thank you for that information, very helpful. I did see the parts diagram on line in a couple of spots, but nowhere did it mention the weights of the rollers. I am in Australia and we have the Euro Variant, but I am sure the rollers would be the same. I can source some malossi ones or other brands as well, but need the dimentions for them and no one seems to know, google has a couple of different options so I was just wondering just what size they really were. Anyway, thanks again for your help, much appreciated. Cheers Oigy

 

[Ian650]

I'm a bit late to the party on this one. The video below is very helpful but it's in Japanese. I just used the translate facility although you don't really need it as the gentleman shows him weighing and measuring the rollers. HTH. Ian

 

[jokerface]

Interesting observation about the OEM BMW variator roller weights

I watched the video posted above, and I noticed that even the mechanic in the video was wondering about the green paint mark on the OEM BMW variator roller weights.

That made me curious as well.

I have carefully gone through the official BMW repair manual for the C400, and surprisingly it doesn't mention this at all. The manual simply says:

"Install roller weights, sliding blocks and guide plate dry."

There is no information about:

• the installation orientation of the roller weights,
• the purpose of the green paint mark,
• or whether the mark should face a specific direction.

Both my original OEM rollers and my new genuine BMW replacement rollers have the same green mark, so it clearly isn't something unique to one set.

Does anyone know what the green mark actually means?

Is it simply a factory quality-control mark, a production batch identifier, or does it have any significance during installation?

I'd be very interested if anyone has official BMW information or first-hand experience regarding this.