Intake Leak around the M62 Bypass Valve Shaft?

[Floyd]

So, to give some context, I've always noticed a minor throttle hesitation. A time gap between blipping the throttle and the revs responding.
Especially noticeable when revving while sitting stationary. And also what sounds like a vacuum leak when it occurs. It was never terrible and I kind of just figured it was the bypass valve bleeding off some boost while sitting stationary. I've never found a vacuum leak when checking all of my hoses.

Now, I recently started getting a P0133 code (Heated Oxygen Sensor Slow Response Bank 1 Sensor 1)

Since that code could also point to an intake leak, I wanted to smoke the intake before looking into swapping a sensor. And I found a lot of smoke coming out of the bypass valve shaft. Has anyone else seen this? I'm not sure what course of action to take to try to seal that up.

Here is a timestamped video showing the smoke pouring out of that shaft:

 

[Floyd]

Alright, after reading a bunch of different forums, I think I found the solution.

There are 2 needle bearings that the bypass valve shaft rides on.
The closed end uses a closed end bearing, and the end the shaft comes out of and attaches to the bypass valve is an open bearing.
The bypass valve shaft OD is 10mm.

The part you need numbers are:
HK-1014-2RS for the open end bearing. The bearing ID is 10mm, the bearing OD is 14mm and the length is 14mm.
BK-1012-RS for the closed bearing. ID 10mm, OD 14mm, and the length is shorter at 12mm.

Important: The "RS" means that the bearings have an integral seal. You need the ones with seals to prevent vacuum leaks.

I think I found a seller that appears to be selling them together in a bundle on Ebay for $19 + shipping. Look up "Supercharger Bypass Valve Needle Bearing Set" on there and you should find it. He doesn't list part numbers, but it looks right.

It will be a little while, but I'll update this thread once I get it changed and let you know if it takes care of it.

 

[Gtstorey]

It looks like the HK is a pretty common bearing. The BK not so much.

 

[Rauq]

It will be a little while, but I'll update this thread once I get it changed and let you know if it takes care of it.

How'd this end up working out for you?