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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Silicone Vacuum Line Replacement



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      03-25-2020, 02:55 PM   #243
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Quote:
Originally Posted by str8rcn View Post
Replaced all in my '07 today. Fixed the 30ff code and seems to run/idle better.
2 hours from start to finish including removal/install of cowl etc...

Used the same hose from verocious motorsports. I removed the vacuum canisters, moved the coolant tank without disconnecting hoses, moved wiper fluid fill neck out of the way, and removed the heat shield on inner passenger shock tower. This made things much easier. Only the lines from solenoid to turbo are a pain.
The front for me was the worst. Finally I was able to put my hand in with palm facing up and then turn over to get to the nipple. The rear was easier. Definitely use a small razor knife to cut the hose before removal as others have said.
The only tip I can give is I did "bevel out" the inside of the 3.5mm hose just a slight bit and put a dab of silicone spray on it to help get started on the turbo hoses and it did help.
Few pics below to show what i removed in case it helps.
Great pictures! And also great tips on replacing the lines.
-Steve
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      04-13-2020, 03:24 AM   #244
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Doing my lines and I was just removing and replacing lines. However, when I looked at the diagram it is hard to determine which of the vacuum lines go to which bottom of the vacuum canisters.

Can someone confirm which one goes where or does it matter? What happens if the order is swapped?
The blue circles are the things I am talking about.

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      04-13-2020, 07:21 AM   #245
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where the alternator is those two lines run in to cans does not matter which boost can they go to.. both go over to boost solenoids..one for each turbo
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      04-13-2020, 09:32 PM   #246
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Thanks that is what I figured but better to just ask.
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      04-13-2020, 09:46 PM   #247
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Quote:
Originally Posted by frenzy757 View Post
Thanks that is what I figured but better to just ask.
The lines in question go to the bottom of the vacuum canister from the factory, the lines from the top go to the turbo actuators
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      04-19-2020, 07:38 PM   #248
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Can someone tell me this part number?

Does anyone know the part number that connects to hoses 5 and 6 on the right side under the intake manifold? Not the left side that goes to the vacuum canisters. I broke off one of the nipples on them and can't find the part number to order a replacement.


The diagram is from #13 here

https://www.e90post.com/forums/showp...0&postcount=13

*EDIT*
Got it:
11666769086
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Last edited by frenzy757; 04-19-2020 at 11:31 PM..
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      09-21-2020, 08:01 AM   #249
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Finally got around to replacing these damn hoses.

Did all except the ones going to the waste gates. Retained the original hard pipes that go over the valve cover and just replaced the ends. Tested the hard lines by submerging in water and blowing air while observing for bubbles.


I don't know what size hands you guys have or how many joints you got in your wrist, but for me there is no way of getting that front waste gate hose on.
I removed the canisters, I moved the coolant tank, and still no space.

Front and rear waste gate hose I can feel and probably remove but I feel it would be an issue putting it back on. I don’t think I would have enough leverage to push the new hose onto the waste gate.

Would it be possible to get to these easier from under the car?

Last edited by Wolf 335; 09-21-2020 at 10:39 PM..
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      09-21-2020, 12:31 PM   #250
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Quote:
Originally Posted by Wolf 335 View Post
Finally got around to replacing these damn hoses.

Did all except the ones going to the waste gates. Retained the original hard pipes that go over the valve cover and just replaced the ends. Tested the hard lines by submerging in water and blowing air while observing for bubbles.


I don't know what size hands you guys have or how many joints you got in your wrist, but for me there is no way of getting that front waste gate hose on.
I removed the canisters, I moved the coolant tank, and still no space.

Front and rear waste gate hose I can feel and probably remove but I feel it would be an issue putting it back on.

Would it be possible to get to these easier from under the car?
It's been a long time but if you can get some 3D printer filament or some tie wire, you can cut the hose going to the wastegate and have just enough sticking out you can get to it. slide the filament or tie wire in the line, pull off the old and slide the vacuum line over the tie wire and just follow your had to the wastegate.
I know its not that easy but I am pretty sure that is how I did it.
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      09-23-2020, 03:23 PM   #251
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Quote:
Originally Posted by NoGuru View Post
It's been a long time but if you can get some 3D printer filament or some tie wire, you can cut the hose going to the wastegate and have just enough sticking out you can get to it. slide the filament or tie wire in the line, pull off the old and slide the vacuum line over the tie wire and just follow your had to the wastegate.
I know its not that easy but I am pretty sure that is how I did it.
This is how it's been explained to me. I left the front one in place but I have the hose to change it if it leaks.
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      10-16-2020, 04:16 AM   #252
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here's the diagram i used to replace my lines.....
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      10-16-2020, 08:12 AM   #253
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Quote:
Originally Posted by SJM67 View Post
here's the diagram i used to replace my lines.....
And how did you get to the turbo nipples?
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      10-16-2020, 09:15 AM   #254
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Quote:
Originally Posted by Wolf 335 View Post
Quote:
Originally Posted by SJM67 View Post
here's the diagram i used to replace my lines.....
And how did you get to the turbo nipples?
Make sure the engine is extremely cold, best to do it in the morning after the car sat all night without anyone starting it

Trace the original boost line with your hand until you find it, I recommend doing that a few times so you can find it when the line is off (get really used to the spot, trust me it can help tremendously when the old line is off)

Then pull it off, you don't have to be as gentle but I'd still be efficient as possible, don't pull dumbly. Try to wrap the old one around your finger and pull, space is tight but I just got it done recently without issues

Then replace...

PM if you need further help and maybe I can give some assistance over facetime of something similar if you're an Android user
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      10-16-2020, 02:09 PM   #255
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Quote:
Originally Posted by Wolf 335 View Post
And how did you get to the turbo nipples?
like everyone else...for the front turbo...removed air cannisters and finagled my fingers down there and YANKED...the rear turbo removed the expansion tank and lied down across the top of engine..and YANKED... before replacing with new hose i beveled the inside of the hose and spit on it before inserting them on...
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      10-16-2020, 07:48 PM   #256
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Quote:
Originally Posted by SJM67 View Post
like everyone else...for the front turbo...removed air cannisters and finagled my fingers down there and YANKED...the rear turbo removed the expansion tank and lied down across the top of engine..and YANKED... before replacing with new hose i beveled the inside of the hose and spit on it before inserting them on...
yep i did too, at first it looks like it's impossible but when you put your arm deep in the down of your engine, you can feel the metal nipple of the turbo wastegate and push the silicone hose into it
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      01-19-2021, 09:48 PM   #257
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Great thread! Read thru all 12 pages

This looks like a decent replacement hose, thoughts?

https://www.amazon.com/gp/product/B0...41a45d660d592d
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      01-20-2021, 08:05 AM   #258
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Quote:
Originally Posted by Gregrobin View Post
Great thread! Read thru all 12 pages

This looks like a decent replacement hose, thoughts?

https://www.amazon.com/gp/product/B0...41a45d660d592d
I ordered the verocious motorpsorts hose and it worked well. I'm sure this would be fine as well...it's not a crazy high spec part we're talking about here.
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      01-20-2021, 12:44 PM   #259
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Quote:
Originally Posted by Bimmer_Engineer View Post
I ordered the verocious motorpsorts hose and it worked well. I'm sure this would be fine as well...it's not a crazy high spec part we're talking about here.
I agree, the price of this with free shipping is the same as Verocious with shipping.

If I do not have any codes does that mean my boost is ok, no leaks?
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      01-20-2021, 01:14 PM   #260
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Quote:
Originally Posted by Gregrobin View Post
Quote:
Originally Posted by Bimmer_Engineer View Post
I ordered the verocious motorpsorts hose and it worked well. I'm sure this would be fine as well...it's not a crazy high spec part we're talking about here.
I agree, the price of this with free shipping is the same as Verocious with shipping.

If I do not have any codes does that mean my boost is ok, no leaks?
Most likely yes. However, if you really want to know if you have any vacuum leaks, you should do a smoke test.
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      06-06-2021, 02:05 PM   #261
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Friendly bump since this thread has some good info and also my results:

SUPER easy while doing an inlet install Both wastegates took 10 seconds each to get on and had plenty of room for hands and to route how I liked, the boost solenoids were honestly tougher. I used this CRP 3.5mm BMW blue silicone hose from FCP.

https://www.fcpeuro.com/products/bmw...MaArMvEALw_wcB

Also have the ECS vacuum relocation kit on the intake side and all new black hosing that's tucked out of sight.

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      09-22-2021, 04:22 PM   #262
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Quote:
Originally Posted by mattlac View Post
Hmmm.

I double and triple checked every line and everything is plugged in and secure. No kinks in any lines, no cracked or broken nipples.
Did you ever figure out the issue?
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      10-20-2021, 04:20 PM   #263
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Started replacing mine with Red
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      02-26-2022, 09:46 PM   #264
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Cool Exact Measurements

Thank you all.
Just giving back to the community exact measurements from my N54. Should be the same length regardless of body type E90/91/92/93. But these original lines are from an E93. I bought 15 Feet of "Verocious Platinum Cured Silicone Vacuum Hose - 3.5mm Blue" from verociousmotorsports. Ended up with 5 Feet extra. But next time I will probably color combo with White Silicone Lines

I divided all the lines into 7 sections. In order of difficulty. 1 being the easiest. 7 being the most difficult. This is the order I recommend but do what you want! I am rounding up values since they are not perfectly straight, I was fighting with some scotch tape to keep them in place to take pictures.
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Section 1 - Near Brake Booster Hose = 7.5" Inches x1
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Section 2 - Twin Lines Near Oil Filter Housing (They are the same size) = 6.5" Inches x2
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Section 3 - Twin Lines exiting the black McDonald Straws on top of Engine connecting to Bottom of both Vacuum Canisters = 6.0" Inches x1 & 9.5" Inches x1
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Section 4 - On Top of both Vacuum Canisters = 16" Inches x1 & 20" Inches x1
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Section 5 - Nearest Boost Solenoids = 1.5" Inches x2 & 5" Inches x1
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Section 6 - Front Turbo = 15.5" Inches x1
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Section 7 - Rear Turbo = 20.5" Inches x1
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Result:
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