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...

[HeatherM35d]

My x5d has 163,000 on it and I just had all the emissions deletes done as a preventative maintenance. All the little vacuum lines were fine .. There was some rubbing where they pass by the oil supply line of the top turbo. To get that whole mess of vacuum lines into a spot where it can be worked on takes about a half hour to remove the air box, intake tube,crankcase tubing and plastic cowl by windshield.. After that you need to remove a few sensor plug ends and the differential pressure sensor hoses and there should be about 9-10 bolts and nuts with a 10mm hex.. Take them out and roll the whole mess on top of the valve cover area..but.. These hoses were in good shape on my ride. Take a good look by the small top turbo, not only vacuum line fraying but you may find the oil supply line is seeping/leaking.

[socale39]

My high pressure oil line was just replaced by BMW after I noticed some oil dampness by the turbo.

As for the removal of the entire bracket, no way can you get all that done in 30min. I consider myself a rather experienced mechanic having done a lot of work on BMWs and it's not as easy as just removing some bolts and flipping over the whole unit. The wiring harness and several other pieces need to be removed first. Not to mention you have very limited space to work. Not fun so far.

Thanks for the tips though. Eventually I want to do the full delete as well.

[HeatherM35d]

Here's the vacuum line bundle just flipped over onto the valve cover, with sensor harness disconnected.. No big deal really.. Just need to know where to find the nuts and bolts without seeing them

[HeatherM35d]

Here is the electrical harness for all of the sensors on the passenger side of the engine. Mostly emissions equipment. After the emissions delete hardware and tune, hardly any of this is of any use.

[socale39]

Thanks for posting that pic. I assume that you removed the black plastic piece first then removed the bracket?

I just noticed you also removed the harnesses from their holders. I've been doing this with them in place which as you know get in the way. I may tackle it tomorrow but we'll see.

Just curious but what was the reason you had yours apart?

[HeatherM35d]

Bohl Diesel Performance had it apart and did emissions deletes on it and a tune.. Hybrid turbos and the 400 hp tune is next

[socale39]

Definitely interested in hearing more about your project. Do you have a build thread for your progress?

[HeatherM35d]

Originally Posted by socale39

Definitely interested in hearing more about your project. Do you have a build thread for your progress?

No I haven't. I'm kind of new at this. I've been creepin' on the forums for a while and just joined recently.

[captpilly]

Bringing this back from the dead - how were the converters to replace? Any updates on tune performance a few years later?

I'm having to tear things apart to replace glow plug controller, glow plugs, and was going to do vacuum lines since it's all in that area.