CBC is TRASH! Need recommendations

[DeTh]

Curious to what VTT has to say about this...

[FrankMstein]

ron_s55 It's because of the cheap ass YFS Taiwan fasteners and their inability to even put on marginal coatings. 12.9 would not shear off like they are doing or rust if they were gud kuality fasteners. All your other ones on the car aren't rusting are they?

Listen up folks because I don't think anyone is. These bolts are SHIT. If Vargas found the cheapest ass shit that they could makes you wonder about the aluminum.

I spent a few years in the fastener industry as a quality engineer and I can tell you these are shit. If it were me, I'd take all of Vargas products off my car and throw them out like unsweetened tea! At a minimum of you want to keep their placebo, then at least get something from an American facility. You see the YFS stamped on the drive? If you look up the letters on the drive (if there aren't any I guarantee you it's CCChinese) and you can find the source.

FYI I was too close to the Takata fiasco and this is why I exited the industry.

[wheela]

If you guys look at the broken off bolts, they don't look sheared, they appear to be fatigue failures. Very interesting, I'm still trying to figure out how they're getting cyclically loaded there? I suspect that any wobble in the harmonic dampener could do it, since the crank bolt head going through the center of the CBC would try to constrain the CBC from wobbling along with the dampener. Those bolts (along with the crank bolt head) would carry the reaction force from the wobble.

[FrankMstein]

Originally Posted by wheela

If you guys look at the broken off bolts, they don't look sheared, they appear to be fatigue failures. Very interesting, I'm still trying to figure out how they're getting cyclically loaded there? I suspect that any wobble in the harmonic dampener could do it, since the crank bolt head going through the center of the CBC would try to constrain the CBC from wobbling along with the dampener. Those bolts (along with the crank bolt head) would carry the reaction force from the wobble.

I agree however the OEM bolts do not do this. Chinese fasteners are crap. I have looked at enough of their 1000x copied material certs to know they are...not good no matter the rating.

https://smrp.org/News/Solutions-Quar...-Failure-Modes

[wheela]

Originally Posted by FrankMstein

I agree however the OEM bolts do not do this. Chinese fasteners are crap. I have looked at enough of their 1000x copied material certs to know they are...not good no matter the rating.

https://smrp.org/News/Solutions-Quar...-Failure-Modes

I totally agree, stay away from Chinese bolts (Chinese metals in general).

[Groganrocket]

I emailed vtt and they say it’s install error lol.

[CT92F80]

Are there any CBC's on the market that actually do their job???

[wheela]

Originally Posted by CT92F80

Are there any CBC's on the market that actually do their job???

My own opinion is that I'm highly skeptical that CBC provides any meaningful prevention of spun hub. I wouldn't put one on my car.

[Schultz28]

Originally Posted by CT92F80

Are there any CBC's on the market that actually do their job???

No, the CBC is a waste of money and such a gimmick for shops to make money.

This should just be a lesson, don't be cheap trying to fix problems. If you want to keep your hub from spinning, pony up to buy a pinned hub and have a reputable shop install it. Otherwise, take the risk of it spinning. The OP would have saved a bunch of time and money if he did nothing and let his hub spin.

[todd20]

Originally Posted by Groganrocket

I emailed vtt and they say it’s install error lol.

Because its so hard to install 8 bolts... LMAO

[JAI///M3]

Maybe they meant choosing to install it was a mistake…?

[Dsmdrew]

What the told me on ig

[S55_M3]

So I have been watching this thread and trying not to scare myself but I decided to take a peek at my VTT CBC, and damn if I am glad I did. I had my crankhub done by a very reputable shop in central florida that has done several hundred crankhubs. They do not do things incorrectly. Here is a pic of mine, mind you this was just installed 02/23/23 so the install is basically new with only a couple thousand mile. Needless to say I am removing mine to avoid any major damage.

[Dsmdrew]

Is it just vtts tho. Haven't seen other cbcs fail

[FrankMstein]

Originally Posted by Dsmdrew

What the told me on ig

B.S. I see they read my post on Taiwan bolts. That is to laugh, like you can't get cheap shit bolts made in Taiwan in the US?!? They may source them here, but they are certainly from, basically, china. Look at the head and the manufacturer is on the drive, WTAF? It shows that they don't know what they are doing. IDGAS about the amount they have sold, many people believe placebos fix things. Beware of people in the business of trying to sell you things you many not need.

[FrankMstein]

Originally Posted by S55_M3

So I have been watching this thread and trying not to scare myself but I decided to take a peek at my VTT CBC, and damn if I am glad I did. I had my crankhub done by a very reputable shop in central florida that has done several hundred crankhubs. They do not do things incorrectly. Here is a pic of mine, mind you this was just installed 02/23/23 so the install is basically new with only a couple thousand mile. Needless to say I am removing mine to avoid any major damage.

This one appears to be spinning in the direction of being lose? I clearly see marks where the bolts were tightened and the washers made contact marks OR they tightened them more than once. Given the other posts I am leaning on movement rather than 2x tighten which seem implausible given the hourly rate one can make at a shop.

Again, these are YFS, R.O.C.
https://www.fastener-world.com/en/su...ead%20products.

[S55_M3]

I’m starting to wonder if the bolts are a tad too long and actually bottoming out which would make the installer think they are all the way tight. Just a guess to be honest.

[Commanderwiggin]

Friends don’t let friends buy VTT products. Unfortunately the Tony curse strikes again.

[Dsmdrew]

They sound like csf. It's all about how much they sell but not the product! I will never buy csf and now vtt.

[JAI///M3]

Originally Posted by S55_M3

I’m starting to wonder if the bolts are a tad too long and actually bottoming out which would make the installer think they are all the way tight. Just a guess to be honest.

Interesting thought . I have a brand new Precision Dynamic hub and Kies CBC (with hardware) on the shelf here. I’m going to measure when I get home.

[lookitsapples]

Is everyone with issues using the CBC + spline lock or pinned fix? I swear it was a known thing that VTT said and other companies said, to not run the CBC alone as it won't be enough from day 1. That it'll be better than nothing, but absolutely not enough to prevent it as a full fix

[FrankMstein]

Originally Posted by S55_M3

I’m starting to wonder if the bolts are a tad too long and actually bottoming out which would make the installer think they are all the way tight. Just a guess to be honest.

That is a good point, although keep in mind who we are talking about, VTT. some of the capture nuts could be machined thinner than others also. The variation from cheap suppliers could be great. Look at the rusted screws in post #43. Brake cleaner will not make a properly coated bolt rust any easier. I'd say there was nearly zero black phos plating on them. Look at the others, not rusted. How well do you think they control the length? Let's not get into washer thickness variation. Once you have thin washers, thinner capture nut, and tad longer nut all of this will make it seem like a prematurely torqued up screw. That is not going to happen that much that we have this many already. All of these look tight given the marks on the VTT. Overtight (is there even a install specification) for the cheap screws on the broken ones? Looks like it.