Went for a drive, lost power and now car exhaust sounds like it has cams

[eacmen]

You should ask them for a list of what exactly they did to the VANOS. That is part of the VANOS oil pump (which is what interfaces with the exhaust hub). Usually, the pump discs are replaced with redrilled units that reduce the backlash between the disc and the hub.

If that is what was done to your car, then sounds like installer error or an issue with the replacement part.

Concur, somehow I missed the fact that you recently had the VANOS hub done. Can't really see whats going on in the photo. Which bearings gave out?

[eacmen]

This is what I thought and I even asked if it was the oil pump disk and he said it wasn't. It was the bearing that was there. Not sure what to do at this point.

I did tell them to do the oil pump disk but they said that the exhaust hub was the only thing that needed to be changed.

See attached invoice of what they did.

They are correct, the VAC hub does not need a new pump disc.

[jpy1980]

Not really sure and his reply below. I called him after the fact and he said it was a bearing on the exhaust side.

see below:

Hey Julian,

Pulled the valve cover and looks like the vanos unit. The bearing came apart. I took some pictures but hard to see.

Sam, has seen that twice before and rebuilding the vanos wouldn’t of fixed that issue. The bearing came apart seems like on the exhaust side.

[jpy1980]

Would something like this be solved with a new VANOS unit like this: https://beisansystems.com/product/s5...s-11367838161/

[eacmen]

Not really sure and his reply below. I called him after the fact and he said it was a bearing on the exhaust side.

see below:

Hey Julian,

Pulled the valve cover and looks like the vanos unit. The bearing came apart. I took some pictures but hard to see.

Sam, has seen that twice before and rebuilding the vanos wouldn't of fixed that issue. The bearing came apart seems like on the exhaust side.

Its happened to me. It is a fairly common issue. Too bad they didn't catch it when they did the hub. This is why many vanos rebuild folks don't give a flat core charge, its tiered based on condition.

Good luck, hope they can get it back on the road soon!

[jpy1980]

Its happened to me. It is a fairly common issue. Too bad they didn't catch it when they did the hub. This is why many vanos rebuild folks don't give a flat core charge, its tiered based on condition.

Good luck, hope they can get it back on the road soon!

Ah you had this happen to you? What did you do to fix it?

[eacmen]

Would something like this be solved with a new VANOS unit like this: https://beisansystems.com/product/s5...s-11367838161/

Careful with the fitment of this unit and the VAC hub. Beisan started milling their own oil pump disc with smaller holes that won't fit op's VAC exhaust hub. If you order it make sure they send you one with the OE pump disc holes.

[eacmen]

Ah you had this happen to you? What did you do to fix it?

Luckily it was discovered after swapping in a rebuilt unit.

Back when Naturally Agitated (RIP) was rebuilding VANOS units - he got my core back and said the bearings were shot and the core was not rebuildable. I thought I had noticed some play in the oil pump disc but he ended up confirming it.

[heinzboehmer]

This is what I thought and I even asked if it was the oil pump disk and he said it wasn't. It was the bearing that was there. Not sure what to do at this point.

I did tell them to do the oil pump disk but they said that the exhaust hub was the only thing that needed to be changed.

See attached invoice of what they did.

Huh, yeah it looks like they didn't do any work in that area.

Coincidence? Maybe something starved the bearing of oil and made it fail? Hard to do anything but guess really.

[jpy1980]

Oh, this doesn't come with its own exhaust hub and oil disk? I thought it was just plug and play?

[jpy1980]

Huh, yeah it looks like they didn't do any work in that area.

Coincidence? Maybe something starved the bearing of oil and made it fail? Hard to do anything but guess really.

Yea, hard to play the blame game as I just want the car back. Whatever, its just money, right. bleh.

Thanks so much for the responses guys!

[eacmen]

Oh, this doesn't come with its own exhaust hub and oil disk? I thought it was just plug and play?

It does not come with exhaust hub. Since you already put a $700 upgraded VAC hub on the car I assume you want to keep it?

Call up beisan and see if they can sell you a rebuilt VANOS with tbd OEM pump disc hole size.

[Slideways]

If they did not remove the securing clip for the oil pump disc and left the VANOS unit completely stock, then there might be a problem with that VAC exhaust hub. Otherwise, it would be an installation issue like heinzboehmer said.

In your picture, I cannot see the securing clip or washer for the VANOS oil pump disc. That is a strong clip that retains the ring that has now fallen out onto the exhaust hub.

[karter16]

UGH finally got an update.

The shop said after taking a look at the VANOS system, the bearing inside shattered. He believes it was on the exhaust side. The same shop did the exhaust hub work a couple of months ago, but said that this was not related to that. The bearing that shattered was not an item you can rebuild. I have no idea what they are saying but after look at the photos, it looks bad.

So now we are trying to source a whole new VANOS unit. He believes getting a new unit will solve the issue. They are going to look for one, but if they can't I am just going to order the Beisan system. Totally sucks since I just spent so much on this car with the CSL intake hahahahahahah.

See photos.

What do you think?

These photos seem to show that the retaining ring that holds the outer race of the pump disc has popped out and the outer race is what he's moving with the pick?

If so it seems possible that if the retaining clip wasn't seated properly that could have caused the rest of the destruction subsequently?

It's been a while since I did mine but from memory that seems plausible no?


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[jpy1980]

The shop I used is a pretty well knows shop in SoCal and they work on bmws all the time so I’m giving them the benefit of the doubt that they did the work correctly.

we will see once they give me more info