installing/uninstalling N55 downpipes

Exalted_Tuna · 12-14-2011, 11:31 AM

So im having my AR 4" dp's being installed tomorrow by an auto shop along with my jb3 stage 2. my inspection is coming up in june so i was just curious how long it will take to uninstall the ar's and reinstall the OEM dp's.

i have access to a full lift. but is engine lowering necessary?

Alex

My135 · 12-14-2011, 12:32 PM

I guess it would be easier than N54. The alternative is either install a DP fix or upgrade your JB3 to JB4 and activate the DP fix (auto delete DP related error codes).

Exalted_Tuna · 12-14-2011, 03:55 PM

the jb3 stage 2 comes with a dp fix. im just worried about emissions.

bogart · 12-14-2011, 04:26 PM

If you have a lift it will be easy. It is about a 5-6 hour job. Maybe less if you have done it before. An extra set of hands helps out a lot too. No engine drop necessary. Just remove the midpipe, take off the V-clamp, unbolt the engine mounts, unscrew the O2 sensors, and it's off. Do the reverse to reinstall. I would try the emissions first to see if you actually fail, and then remove it if you can't pass with the DP.

Tony135 · 12-14-2011, 04:33 PM

It took me like 12 hours the first time doing it because I had a prototype that I had to insatll and uninstall about 20 times. I could probably do it in 3 hours now. It's not too hard if everything fits right.

fullboost · 12-14-2011, 05:53 PM

Why does everyone keep saying downpipes on an N55. 1 Turbo, 1 downpipe, no?

whitecord · 12-14-2011, 06:19 PM

it only took me about a 1 hour on my n54 so it should be less on a n55. leave the sensors in the pipe. slide the exhaust back undo the v band and swap sensors.. shouldnt take long.

Exalted_Tuna · 12-14-2011, 06:57 PM

Quote:

Originally Posted by bogart

If you have a lift it will be easy. It is about a 5-6 hour job. Maybe less if you have done it before. An extra set of hands helps out a lot too. No engine drop necessary. Just remove the midpipe, take off the V-clamp, unbolt the engine mounts, unscrew the O2 sensors, and it's off. Do the reverse to reinstall. I would try the emissions first to see if you actually fail, and then remove it if you can't pass with the DP.

thanks for the post. ill ask someone for an emissions test.

bogart · 12-14-2011, 10:53 PM

Quote:

Originally Posted by fullboost

Why does everyone keep saying downpipes on an N55. 1 Turbo, 1 downpipe, no?

Correct, 1 downpipe on the N55...

Quote:

Originally Posted by mosites87

thanks for the post. ill ask someone for an emissions test.

Good call, save your time and effort if you can just pass with leaving the DP on. Also check your local laws. In the state of Missouri, I don't have to test my car for emissions for 5 years, because it was a new car. Pretty sweet, huh!

Exalted_Tuna · 12-15-2011, 04:09 AM

yea thats actually awesome. in PA im almost positive you need an emissions test every year. not positive though.

pnosker · 12-15-2011, 08:05 AM

The "dpfix" just mutes the CEL from displaying with a O2 code by clearing it. The product is that when they scan for monitors, the O2 will scan as "not ready" and you will fail. The only real way to pass is to use a O2 simulator, not relying on the JB auto-clear. You can just swap out during inspection as well.

Exalted_Tuna · 12-15-2011, 05:34 PM

Quote:

Originally Posted by pnosker

The "dpfix" just mutes the CEL from displaying with a O2 code by clearing it. The product is that when they scan for monitors, the O2 will scan as "not ready" and you will fail. The only real way to pass is to use a O2 simulator, not relying on the JB auto-clear. You can just swap out during inspection as well.

so i just have to connect the 02 simulators back in?

12-14-2011, 11:31 AM	#1
Exalted_Tuna Private 6 Rep 87 Posts Drives: 2022 X3MC Join Date: Jun 2011 Location: Pittsburgh iTrader: (2) Garage List 2022 BMW X3MC [0.00] 2011 BMW 135i [0.00]	installing/uninstalling N55 downpipes So im having my AR 4" dp's being installed tomorrow by an auto shop along with my jb3 stage 2. my inspection is coming up in june so i was just curious how long it will take to uninstall the ar's and reinstall the OEM dp's. i have access to a full lift. but is engine lowering necessary? Alex
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12-14-2011, 12:32 PM	#2
My135 Lieutenant Colonel 85 Rep 1,609 Posts Drives: Join Date: Mar 2008 iTrader: (0)	I guess it would be easier than N54. The alternative is either install a DP fix or upgrade your JB3 to JB4 and activate the DP fix (auto delete DP related error codes). __________________ 7/08 135 Coupe, Crimson Red, 6 SP, Sport, Taupe Lette/Aluminum. Performance Mods: JB4 on Map 5, BMS DP Fix V3, Injen polished intake, AR Catless DP, Maddad resonated mid-pipes, aFe exhaust polished tips, ST Suspension Coil Over and Hotchkis front sway bar. Others: BMS OCC, BT Scanner, Mud Flap. Next Mods: AA Front Strut Brace.
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12-14-2011, 03:55 PM	#3
Exalted_Tuna Private 6 Rep 87 Posts Drives: 2022 X3MC Join Date: Jun 2011 Location: Pittsburgh iTrader: (2) Garage List 2022 BMW X3MC [0.00] 2011 BMW 135i [0.00]	the jb3 stage 2 comes with a dp fix. im just worried about emissions.
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12-14-2011, 04:26 PM	#4
bogart Lieutenant Colonel 116 Rep 1,664 Posts Drives: E82 N55 DCT Join Date: Nov 2010 Location: STL, MO iTrader: (4) Garage List 2011 BMW 135i [7.06]	If you have a lift it will be easy. It is about a 5-6 hour job. Maybe less if you have done it before. An extra set of hands helps out a lot too. No engine drop necessary. Just remove the midpipe, take off the V-clamp, unbolt the engine mounts, unscrew the O2 sensors, and it's off. Do the reverse to reinstall. I would try the emissions first to see if you actually fail, and then remove it if you can't pass with the DP. __________________
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12-14-2011, 04:33 PM	#5
Tony135 Lieutenant Colonel 178 Rep 1,516 Posts Drives: ‘22 Model 3 Join Date: May 2011 Location: SoCal iTrader: (0)	It took me like 12 hours the first time doing it because I had a prototype that I had to insatll and uninstall about 20 times. I could probably do it in 3 hours now. It's not too hard if everything fits right.
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12-14-2011, 05:53 PM	#6
fullboost Second Lieutenant 10 Rep 204 Posts Drives: '11 M3 DCT Join Date: Jan 2011 Location: SD, CA iTrader: (0)	Why does everyone keep saying downpipes on an N55. 1 Turbo, 1 downpipe, no?
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12-14-2011, 06:19 PM	#7
whitecord Second Lieutenant 10 Rep 235 Posts Drives: 500whp 318ti Join Date: May 2006 Location: bonita springs iTrader: (4)	it only took me about a 1 hour on my n54 so it should be less on a n55. leave the sensors in the pipe. slide the exhaust back undo the v band and swap sensors.. shouldnt take long.
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12-15-2011, 04:09 AM	#10
Exalted_Tuna Private 6 Rep 87 Posts Drives: 2022 X3MC Join Date: Jun 2011 Location: Pittsburgh iTrader: (2) Garage List 2022 BMW X3MC [0.00] 2011 BMW 135i [0.00]	yea thats actually awesome. in PA im almost positive you need an emissions test every year. not positive though.
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12-15-2011, 08:05 AM	#11
pnosker ti fan 67 Rep 273 Posts Drives: 14 12C \| 17 X5 50i \| 19 M2C Join Date: Jan 2008 Location: NJ iTrader: (1) Garage List 2014 McLaren 12C Sp ... [0.00] 2017 BMW X5 xDrive50i [0.00] 2019 BMW M2 Competi ... [0.00] 2008 BMW 535xi Touring [10.00] 2008 BMW 135i [10.00]	The "dpfix" just mutes the CEL from displaying with a O2 code by clearing it. The product is that when they scan for monitors, the O2 will scan as "not ready" and you will fail. The only real way to pass is to use a O2 simulator, not relying on the JB auto-clear. You can just swap out during inspection as well.
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