Beisan S54 Exhaust Sprocket Hub Solution

[jpiazzam3]

Guys I really appreciate the comments. And my Vanos is a top priority for me. I know it needs to be addressed. But can anyone answer my original question. Is their a Vin number or a build date when BMW switch their hub making process

[mrgizmo04]

So there’s no way of knowing???

Per above comment, you can pop the valve cover off and look to see if your tab(s) broke off, but that is already a bit late. Broken tabs don't always neatly sit in the oil pump orifice waiting for you to discover them, some dislodge themselves and blow holes in the valve cover by being flung by rotating engine, some get wedged in between the sprocket and chain blowing engines, some fall gracefully into the oil pan.

Are you feeling lucky?

[r4dr]

So there’s no way of knowing???

You can open your valve cover and look.

[jpiazzam3]

So there’s no way of knowing???

[mrgizmo04]

I was wondering if my motor is considered early enough

Yeah, what T said, they all break, real cause being the oversized holes in the oil pump disc.

[Tbonem3]

It doesn't matter. If your stock hub is fine, be it the early one or later one, just get the besian pump disc. If your tab(s) ARE broken, whether an earlier or later hub, get this new besian hub (and disc).

[jpiazzam3]

If by "better hub" you mean the one being discussed in this thread, you most definitely don't have it in your car. This hub was only developed in the past year or so. That said, depending on when you bought your car, previous owner might have done some VANOS work and used another solution like Turbotoy, or a cryo hub. You only need the hub if at least one of your tabs is broken, otherwise you can reuse your hub if both tabs are intact. You SHOULD replace the oil pump disc with redrilled holes as that is the real solution to the tab breaking problem.

I would do VANOS before subframe unless your subframe is separated and falling off the car.

I was quoting this part of the original post by Raj ”A small number of early production S54 engines have an initial version of the BMW exhaust hub (pic left hub).
BMW redesigned the original exhaust hub, and the new version (pic right hub) is the one found on most S54 engines and is provided as a BMW part.
The primary difference between the BMW original hub version and the BMW new version is the thickness and taper of the hub wall and wall base curve.
BMW increased the taper (angle) of the hub wall, thus thinning it, and deepened the wall base curve (scoop), thus also thinning it. These changes were likely made to ease the release of the hub from the forging die it’s formed in.” I was wondering if my motor is considered early enough

[mrgizmo04]

Is there anyway of knowing if I have an early enough M3 to fall into that category of having the “better” hub. I have an 01 with a November build date. I still want to do my Vanos as preventative maintenance but I’ve been going back and forth between subframe and Vanos. If there is a way to tell if I have the “better” hub it would help in my decision and maybe put off the Vanos till after subframe reinforcement. Any help would be appreciated

If by "better hub" you mean the one being discussed in this thread, you most definitely don't have it in your car. This hub was only developed in the past year or so. That said, depending on when you bought your car, previous owner might have done some VANOS work and used another solution like Turbotoy, or a cryo hub. You only need the hub if at least one of your tabs is broken, otherwise you can reuse your hub if both tabs are intact. You SHOULD replace the oil pump disc with redrilled holes as that is the real solution to the tab breaking problem.

I would do VANOS before subframe unless your subframe is separated and falling off the car.

[Stack]

My tab is not broken with
102,xxx on the clock....but that's not stopping me, I will be doing the full Beisan system

[jpiazzam3]

Is there anyway of knowing if I have an early enough M3 to fall into that category of having the “better” hub. I have an 01 with a November build date. I still want to do my Vanos as preventative maintenance but I’ve been going back and forth between subframe and Vanos. If there is a way to tell if I have the “better” hub it would help in my decision and maybe put off the Vanos till after subframe reinforcement. Any help would be appreciated

[dstrbdM]

I went to bullet proof my vanos with the Beisan S54 line up (exhaust upper chain guide, rebuilt solenoid pack, Oil pump disk anti-rattle repair, vanos seals) before my exhaust hub broke and when I tore into it I found a broken tab. I was in contacted Raj for a replacement exhaust hub recommendation and he offered me to beta test the new top secret hub! The new hub was delayed due to extensive testing of manufacturing because he said it had to be absolutely perfect. After a couple of push backs i started to get anxious to drive my car and I told him I was going to look for a stock hub or another option. He then sent me a used stock hub for the delay to get me up and running.
It's obvious to me that not many places care this much about their product and their customers as Raj.
100% Class

[Rajaie]

My VAC hub definitely doesn't have much play. It fit snug in a dented disk where broken tabs made it look pretty knarly. Even with extra play it was snug in that one. I now have another disk from a different engine and it's even tighter. It barely moved at all. If it was out or I had the valve cover off I'd measure it for you but next time. From what I've read, the S52 had half the clearance

VAC treated me very well and I ordered directly through them. They literally gave me next day shipping for free just because. Apparently other people have been done dirty by them. I think we need a vendor experience thread on here which I'm 100% Beisan has little no complaints. I don't have anything but good things to say and I've rebuilt two Vanos assemblies with those kits.

Thanks for the nice words of support.

The VAC .2mm play is strait from the VAC website, "reduces the clearance to 0.2mm".
https://store.vacmotorsports.com/s54...ade-p3771.aspx

[jbfrancis3]

Impressive. Beisan taking the long view; the right way to do things.

[kaiv]

Wow! How many miles does that unit have in your car now?

So much has happened since, I couldn't say, sorry! I sold that car quite a while back to. I do remember pulling the hub after some miles and sending it back to Raj for inspection/tweaks.

[Albino09]

Plenty of things to like about Raj/Beisan. One of them is extended testing prior to releasing a product.
Here's a prototype Beisan hub in my car circa 2014

https://www.instagram.com/p/wfeGU1PTuR

Wow! How many miles does that unit have in your car now?