35d Pressure Converters w/ 73k - Replace?

[Socale39]

Hey guys,
I've gone into the deep end with my 35d with replacing the vacuum lines, doing a thorough cleaning of the throttle body, EGR valve, intake manifold and swirl flaps. While I'm still under warranty I decided I just wanted to take the initiative and get this stuff done as preventative and keep the 35d running as best it can. Anyways, getting to all the vacuum lines by the pressure converters is beyond stupid. Its extremely tight and I'm to the point where I can either leave the current converters in and hook everything up or replace them at my cost as a preventative measure......keeping in mind that I'm still under warranty for another 7 months. Replacing them would require further dis-assembly which could be a big pain given where the last few bolts are.

Anyways, curious to hear what you guys think...

[blue dragon]

I had my manifold off earlier this year, I'm at 140k km (about 87k miles), and my swirl flaps were clean. See http://www.xoutpost.com/1039112-post5.html
Assuming that yours are the same with no CBU, I would say its not a concern.

[Socale39]

Swirl flaps were ok. Same with the manifold.

Here's what they looked like upon removal.

[blue dragon]

I would say those are relatively clean considering what I have seen from the 335d

[bawareca]

Yeah, pressure converters are a b!tch to get to, but I was able to replace individual ones(it was for testing, mine are perfectly fine). Raymond(the Norwegian diesel tuner)mentioned that they were replacing them all the time when he was working at a BMW dealer a few years ago, but I didnt hear about any failures here. It is pretty much your decision to replace them all or not. I wouldnt replace them at this mileage.

[Socale39]

Honestly it's nearly impossible to get access to the converters on my 2011 35d. I'd love to see what the shop manual says for replacement but I haven't been able to find anything online. I'm also replacing the red vacuum hose but that goes below the back pressure converter. I'm tempted to just cut it and add a connector to extend it with new hose as far back as I can because it's that hard to get to.

[bawareca]

I have been able to remove one of the converters with long socket and electric ratchet.
I recommend you to extend the blue and red hoses as they may be quite stretched even when new.

[Socale39]

Must be the front pressure converter you got to as I could remove that one as you stated. As for the vacuum hoses I've done just that. Every blue and black hose has been replaced and as for the red I'll likely cut the original towards the back and add a connector to extend new hose towards the front. Actually I think I might have just two black hoses I can't replace due to their location and risk of breaking a sensor.

[captpilly]

Brining up an old thread - not alot of info on pressure converters for e70.

Has anyone gotten around to replacing their converters yet?

[Stockx5]

I am replacing both pressure converters at 110,000 miles
neither holds vacuum when applied with a hand vacuum pump.

Getting the following code:

00428B Boost-pressure control, low-pressure stage, control deviation.

Seems to only be triggered after pressing the brakes then going into full acceleration.