Down pipe install question 340i

Rob340i · 03-29-2018, 01:22 PM

When you replace the downpipe on the 340i do you need to replace either the upper/lower clamps like people say on the 335i? Do i need to replace the gasket on the top side? I see that it is different but im looking for 340i specific info or tips. The diagram is of a 340i gt mine is the sedan but i assume it does not matter in this case.

jalkster · 03-29-2018, 02:24 PM

i didnt

bmwchue · 03-29-2018, 02:26 PM

Best way is to look at it before you install. If money
Isnt an issue buy the clamps. Some cars depending on locations with different mileage the clamps needs replacing or not

Rob340i · 03-30-2018, 03:33 AM

Car is 2018 im more concernedwith the gasket. Also both clamps top/bottom have different part numbers but are they the same size etc etc?

eluded · 03-30-2018, 04:44 AM

Quote:

Originally Posted by bmwchue

If money isnt an issue buy the clamps

You don't buy a 340 if money is an issue

Rob340i · 03-30-2018, 05:25 AM

Quote:

Originally Posted by eluded

You don't buy a 340 if money is an issue

What an assumption...Money is not an issue. Lol ordering parts to get sent to italy and living in a place with little to no storage of parts is an issue. Not having as service center near me is an issue. Not speaking the language is an issue. The issue is I have many things that do not make this situation normal....and because i will be installing myself i wanted to get some info on this.....

kern417 · 03-30-2018, 11:38 AM

Quote:

Originally Posted by eluded

You don't buy a 340 if money is an issue

Rather, I can afford a 50k+ BMW because money is always an issue. I don't care if I have a million bucks to my name. I refuse to waste time and/or money on something that isn't needed.

I haven't heard of anyone replacing the gasket or the clamps, especially on a 2018 car. If you see any deterioration on the gasket then it wouldn't hurt to buy a new one and install it at a later date, but you can likely still get by with it as is for a while. Typically vbands are designed to be run without any gaskets, so it's somewhat redundant in design.

Rob340i · 03-30-2018, 12:49 PM

Quote:

Originally Posted by kern417

Rather, I can afford a 50k+ BMW because money is always an issue. I don't care if I have a million bucks to my name. I refuse to waste time and/or money on something that isn't needed.

I haven't heard of anyone replacing the gasket or the clamps, especially on a 2018 car. If you see any deterioration on the gasket then it wouldn't hurt to buy a new one and install it at a later date, but you can likely still get by with it as is for a while. Typically vbands are designed to be run without any gaskets, so it's somewhat redundant in design.

Well said...and thanks for the input good advice!

eluded · 03-31-2018, 02:38 AM

Quote:

Originally Posted by Rob340i

Quote:

Originally Posted by eluded

You don't buy a 340 if money is an issue

What an assumption...Money is not an issue. Lol ordering parts to get sent to italy and living in a place with little to no storage of parts is an issue. Not having as service center near me is an issue. Not speaking the language is an issue. The issue is I have many things that do not make this situation normal....and because i will be installing myself i wanted to get some info on this.....

Don't get me started on Italy… Lovely country, great people, good luck getting parts there.

Rob340i · 03-31-2018, 04:14 AM

Does anybody have a video of downpipe installation on 340i or b58 for that matter. I cant seem to find one on youtube

PushingRedline · 03-31-2018, 12:04 PM

Quote:

Originally Posted by Rob340i

Does anybody have a video of downpipe installation on 340i or b58 for that matter. I cant seem to find one on youtube

I don't have one but trust me, this dp install isn't that bad. The N55 was a lot worse. You will have to take out the intake box and obviously remove the trays underneath but after that you can see both ends of the dp and remove. Just make sure you unplug the senors and take it nice and slow.

F30dud · 03-31-2018, 12:09 PM

Quote:

Originally Posted by eluded

You don't buy a 340 if money is an issue

LOL, dudes be leasing cars here in the states even when they cant afford them...but this commend is kinda of topic..

Rob340i · 03-30-2019, 01:02 PM

So i did this today and after complete i did not see a gasket like number 2 in the diagram above. It did not fall off or anything and im gonna check the old dp maybe its stuck to it, but if not hopefully its stuck to the turbo side...Thoughts

Rob340i · 03-31-2019, 02:00 AM

So its not on the stock dp although it may have ben built in it looks like a ceramic material coming out of a ring on the stock dp....but the ring is not detachable....so would an aftermarket dp need a gasket it seems to be going well with no issues so far

B58 · 03-31-2019, 11:54 AM

I used the same o-ring twice and its still fine.

03-29-2018, 01:22 PM	#1
Rob340i Sergeant First Class 87 Rep 150 Posts Drives: 340i M Sport Join Date: Nov 2017 Location: Italy iTrader: (0)	Down pipe install question 340i When you replace the downpipe on the 340i do you need to replace either the upper/lower clamps like people say on the 335i? Do i need to replace the gasket on the top side? I see that it is different but im looking for 340i specific info or tips. The diagram is of a 340i gt mine is the sedan but i assume it does not matter in this case. Attached Images
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03-29-2018, 02:24 PM	#2
jalkster Lieutenant 220 Rep 579 Posts Drives: X3MC Join Date: Jan 2017 Location: Dallas, TX iTrader: (3)	i didnt __________________ Current: 2021 M340i Previous: 2020 X3M Comp BM3 E30 & 2016 340i 8AT DME Stage 2 \| FBO/Catless Meisterschaft Catback \| Ohlins R&T
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03-29-2018, 02:26 PM	#3
bmwchue Captain 242 Rep 804 Posts Drives: 2013 bmw 328i Join Date: Oct 2017 Location: California iTrader: (0)	Best way is to look at it before you install. If money Isnt an issue buy the clamps. Some cars depending on locations with different mileage the clamps needs replacing or not
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03-30-2018, 03:33 AM	#4
Rob340i Sergeant First Class 87 Rep 150 Posts Drives: 340i M Sport Join Date: Nov 2017 Location: Italy iTrader: (0)	Car is 2018 im more concernedwith the gasket. Also both clamps top/bottom have different part numbers but are they the same size etc etc?
	Appreciate 0 Quote

03-31-2018, 04:14 AM	#10
Rob340i Sergeant First Class 87 Rep 150 Posts Drives: 340i M Sport Join Date: Nov 2017 Location: Italy iTrader: (0)	Does anybody have a video of downpipe installation on 340i or b58 for that matter. I cant seem to find one on youtube
	Appreciate 0 Quote

03-30-2019, 01:02 PM	#13
Rob340i Sergeant First Class 87 Rep 150 Posts Drives: 340i M Sport Join Date: Nov 2017 Location: Italy iTrader: (0)	So i did this today and after complete i did not see a gasket like number 2 in the diagram above. It did not fall off or anything and im gonna check the old dp maybe its stuck to it, but if not hopefully its stuck to the turbo side...Thoughts
	Appreciate 0 Quote

03-31-2019, 02:00 AM	#14
Rob340i Sergeant First Class 87 Rep 150 Posts Drives: 340i M Sport Join Date: Nov 2017 Location: Italy iTrader: (0)	So its not on the stock dp although it may have ben built in it looks like a ceramic material coming out of a ring on the stock dp....but the ring is not detachable....so would an aftermarket dp need a gasket it seems to be going well with no issues so far
	Appreciate 0 Quote

03-31-2019, 11:54 AM	#15
B58 Major 559 Rep 1,460 Posts Drives: 922 Turbo Join Date: May 2018 Location: USA iTrader: (1)	I used the same o-ring twice and its still fine. __________________ 2024 X3 M40i 2014 BMW M5
	Appreciate 0 Quote