Another Crank Bolt Capture Solution (Interesting for EURO members)

[behindthen0thing]

Originally Posted by sagi

I was advised by a mechanic not to use a CBC and go the crankhub fix route such as a 4 pin SSR. If it’s done right the bolt won’t back out. Apparently the CBC could potentially bring down the harmonic balancer if the CBC fails which is worst. This mechanic deals with bmws and fixes race cars etc, highly known mechanic in Toronto.

this is bollocks.

just get the CBC

[RugbyBro]

Originally Posted by sagi

Apparently the CBC could potentially bring down the harmonic balancer if the CBC fails which is worst.

I'm trying to understand the logic here... maybe I'm just missing something. Is he saying the balancer would fall off if the CBC failed? That would imply that all 8 bolts miraculously broke and would allow the balancer to fall off.

[MR RIZK]

Originally Posted by RugbyBro

I'm trying to understand the logic here... maybe I'm just missing something. Is he saying the balancer would fall off if the CBC failed? That would imply that all 8 bolts miraculously broke and the would allow the balancer to fall off.

I think he was going to use a 3D printed one.

[sagi]

Originally Posted by MR RIZK

Ok I'm going to bite. So your mechanic is saying the bolt is not done right from factory? What is not right about it? The torque setting?

Also I'm assuming if the mechanic fits your SSR he is not recommending a CBC with it because the bolt will be done right?

And lastly how is the CBC going to fail?

It's late I'm hungry and to me the logic makes no sense. By all means get the SSR but if it was me I would fit the CBC as well.

Ya I was planning to add the CBC on top of the 4 pin SSR crank hub but after he mentioned that it could potentially bring down the balancer, I guess because it sits on top it can break off . I mean I’ve read a lot of folks are just using CBC and it’s been fine. Just didn’t want to regret anything lol

[fivaxis]

CBC has a 0% failure rate.

[Gotulukn]

I'm aware that if you remove the crank hub bolt, it cannot be reused. I am about to have the capture plate installed. I just want to have the crank hub bolt, tightened 45 degrees/ or 1/4 turn, before installing the CBC. I'm aware some shops when installing new ones, tighten it "extra." What are your thoughts?

[cheveux]

Originally Posted by Gotulukn

I'm aware that if you remove the crank hub bolt, it cannot be reused. I am about to have the capture plate installed. I just want to have the crank hub bolt, tightened 45 degrees/ or 1/4 turn, before installing the CBC. I'm aware some shops when installing new ones, tighten it "extra." What are your thoughts?

That's just "impossible"
In addition to having to lock the entire engine to achieve this, the screw is for one use only, it stretches when it is tightened the first time. If you really want to do that, use a new screw, and make sure you do it in a workshop with the right parts to lock the engine

[Chris@VargasTurboTech]

Originally Posted by Gotulukn

I'm aware that if you remove the crank hub bolt, it cannot be reused. I am about to have the capture plate installed. I just want to have the crank hub bolt, tightened 45 degrees/ or 1/4 turn, before installing the CBC. I'm aware some shops when installing new ones, tighten it "extra." What are your thoughts?

It's been done plenty of times but generally speaking isn't recommended for the reasons already outlined.

[MisterF80M3]

Originally Posted by parabmw

There's a guy running e85 with CBC only.
If that doesn't fail why would you need anything more.

There are like a dozen of us. I am one of them.

I'm on Cary Jordan's custom E85 tune ~600WHP.

[fiveohwblow]

Originally Posted by MisterF80M3

There are like a dozen of us. I am one of them.

I'm on Cary Jordan's custom E85 tune ~600WHP.

Ditto

[Wanted_M]

Originally Posted by MisterF80M3

There are like a dozen of us. I am one of them.
I'm on Cary Jordan's custom E85 tune ~600WHP.

Originally Posted by fiveohwblow

Ditto

How many miles since CBC/tune install?

[aakrusen]

Any updates on the effectiveness of the CBC? Is this the main thread for this part or is there another one people are following?