DIY N55 Spark Plug Change

TK335iMSPT · 10-27-2018, 12:40 PM

Quote:

Originally Posted by Orion4

Torque spec for his 335 N55 is 23 nm or 16.96 ftlbs. If all plugs are torqued to spec AND his torque wrench is in cal, appears something else is causing the odor.

This may sound dumb, but I tightened some of them, loosened them and re tightened to ensure the 17ft lbs. Could that have impacted it?

Orion4 · 10-29-2018, 11:44 AM

Quote:

Originally Posted by TK335iMSPT

This may sound dumb, but I tightened some of them, loosened them and re tightened to ensure the 17ft lbs. Could that have impacted it?

Should not have any impact. I guess its possible that one of the sparkplug washers may have failed (I've never experienced it) and some fuel vapor is venting. Pull the ignition coils off and check inside with a light to see if you see any fuel pooling or a strong gas odor in a particular plug.

jkelley · 10-31-2018, 09:12 PM

This was one of the most organized and informative posts I've seen, so props to that. Very thankful for the info (my turn for plugs and coils), but have a bit of an off topic question.

My 1er's valvetronic motor has failed, and I've searched the internet with the hopes of finding a good DIY. So, any links, advice, etc., would be greatly appreciated.

Thanks,

John

Orion4 · 11-03-2018, 05:05 PM

Quote:

Originally Posted by jkelley

This was one of the most organized and informative posts I've seen, so props to that. Very thankful for the info (my turn for plugs and coils), but have a bit of an off topic question.

My 1er's valvetronic motor has failed, and I've searched the internet with the hopes of finding a good DIY. So, any links, advice, etc., would be greatly appreciated.

Thanks,

John

Hope this is what you are looking for:

https://www.fluidmotorunion.com/bmw-...shaft-failure/

https://bmwtechnician.com/2017/03/27...etronic-motor/

Unfortunately, it doesn't appear that Bentley has a Manual for your car.

Logicoeur · 11-04-2018, 12:56 PM

It was a great day in NE to do this job ! Thanks for the write ups guys. Looks like it was also a good 60K on the OEM plugs. Replaced with the Bosh equivalent part# ending in S

integuy98 · 12-12-2018, 11:27 AM

Quote:

Originally Posted by Orion4

Should not have any impact. I guess its possible that one of the sparkplug washers may have failed (I've never experienced it) and some fuel vapor is venting. Pull the ignition coils off and check inside with a light to see if you see any fuel pooling or a strong gas odor in a particular plug.

I've got the same issue unfortunately. Changed 6 plugs on my N55 engine, now I got that damn gas smell in the cabin during idle. No smell with auto start/stop operating when the engine cuts off, and no smell (as far as I can notice) while driving.

I've retorqued all six plugs, no difference it seems.

Should I be tightening to spec with a torque wrench using a universal joint attached to the extension bar? I heard that may throw off the actual torque values.

It's driving me crazy, sure would love everyone's opinions on this.

Rebound · 01-24-2019, 12:21 PM

Quote:

Originally Posted by integuy98

I've got the same issue unfortunately. Changed 6 plugs on my N55 engine, now I got that damn gas smell in the cabin during idle. No smell with auto start/stop operating when the engine cuts off, and no smell (as far as I can notice) while driving.

I've retorqued all six plugs, no difference it seems.

Should I be tightening to spec with a torque wrench using a universal joint attached to the extension bar? I heard that may throw off the actual torque values.

It's driving me crazy, sure would love everyone's opinions on this.

Have you solved this? Fuel leak sounds bad. Perhaps you should check torque on the fuel injector lines? One of them could have been bumped a bit loose. Any gas smell when you sniff around the engine compartment? Hold a cigarette lighter near for a better look... wait... no, just kidding!

Seriously, I’d like to know. Two people having the same problem is worrisome.

dr.roro · 02-14-2019, 08:54 AM

Do you guys use any dielectric grease when replacing the spark plugs?

jh_f30 · 03-01-2019, 11:43 PM

Quote:

Originally Posted by dr.roro

Do you guys use any dielectric grease when replacing the spark plugs?

AFAIK, it's not recommended.

jh_f30 · 03-01-2019, 11:44 PM

Quote:

Originally Posted by Logicoeur

It was a great day in NE to do this job ! Thanks for the write ups guys. Looks like it was also a good 60K on the OEM plugs. Replaced with the Bosh equivalent part# ending in S

Nice. I'm sitting on a new set, waiting for my next day off to swap em. Did you change the gap at all or just go with how they came?

Logicoeur · 03-02-2019, 07:41 AM

Quote:

Originally Posted by jh_f30

Quote:

Originally Posted by Logicoeur

It was a great day in NE to do this job ! Thanks for the write ups guys. Looks like it was also a good 60K on the OEM plugs. Replaced with the Bosh equivalent part# ending in S

Nice. I'm sitting on a new set, waiting for my next day off to swap em. Did you change the gap at all or just go with how they came?

Out of the box straight into the Head. I'm literally stock (just a remus axleback).

.... For now

22jayster! · 03-18-2019, 01:26 PM

Anyone really

thejeremyman9 · 04-16-2020, 01:52 PM

Sorry to bump a little bit of an older thread here but wanted to confirm the approach people are using with respect to using a universal joint. After seeing a few threads recently about cracking the spark plug insulators (and other consequences of doing so), i am wondering if people are using the tools as follows:

3/8 torque wrench --> extension --> U joint --> thin walled socket.

This seems to be what the manual is stating to do, see attached photo.

badbread · 04-16-2020, 01:59 PM

Yep, check out my spark plug guide DIY. Just go to my username .com and you'll see it.

thejeremyman9 · 04-16-2020, 02:26 PM

Quote:

Originally Posted by badbread

Yep, check out my spark plug guide DIY. Just go to my username .com and you'll see it.

Thanks, nice writeup, bookmarked for when i tackle this job in the near future.

Just to confirm, you torqued them with the ujoint in place as i described? Were you not concerned with the Ujoint affecting torque spec?

badbread · 04-16-2020, 04:23 PM

Quote:

Originally Posted by thejeremyman9

Thanks, nice writeup, bookmarked for when i tackle this job in the near future.

Just to confirm, you torqued them with the ujoint in place as i described? Were you not concerned with the Ujoint affecting torque spec?

Correct. I torqued to spec then gave it a tiny smidge more. No problems in 2 changes.

10-31-2018, 09:12 PM	#69
jkelley Registered 0 Rep 3 Posts Drives: 2012 135i M-Sport Join Date: May 2017 Location: Indiana iTrader: (0)	This was one of the most organized and informative posts I've seen, so props to that. Very thankful for the info (my turn for plugs and coils), but have a bit of an off topic question. My 1er's valvetronic motor has failed, and I've searched the internet with the hopes of finding a good DIY. So, any links, advice, etc., would be greatly appreciated. Thanks, John
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11-04-2018, 12:56 PM	#71
Logicoeur Lieutenant Colonel 990 Rep 1,934 Posts Drives: F30 335i xDrive Join Date: Feb 2018 Location: Boston iTrader: (0)	It was a great day in NE to do this job ! Thanks for the write ups guys. Looks like it was also a good 60K on the OEM plugs. Replaced with the Bosh equivalent part# ending in S Attached Images __________________ F30 335iX \| Remus Axleback \| Fabspeed Catted DP \| VRSF Comp IC \| 18X9 ET35 19lb MT1 \| 255/40/18 ECS \| Ohlins RT Millway Street \| Millway Control Arm Bushings \| Turner Endlinks \| TMH 75mm 14x1.5 Studs \| BMW MPerf LSD \| XDelete \| Pipercross Filter \| MHD Stg2 93
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02-14-2019, 08:54 AM	#74
dr.roro Captain 196 Rep 832 Posts Drives: 2019 G01 X3 Join Date: Oct 2007 Location: MD iTrader: (2) Garage List 2015 BMW 435i Coupe [0.00] 2019 BMW X3 xDrive30i [0.00]	Do you guys use any dielectric grease when replacing the spark plugs?
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03-18-2019, 01:26 PM	#78
22jayster! Registered 0 Rep 2 Posts Drives: 2016 435xi Join Date: Mar 2019 Location: USA iTrader: (0)	Anyone really
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04-16-2020, 01:52 PM	#79
thejeremyman9 Major General 4358 Rep 7,591 Posts Drives: 2015 BMW 335i Join Date: May 2019 Location: Cali iTrader: (0)	Sorry to bump a little bit of an older thread here but wanted to confirm the approach people are using with respect to using a universal joint. After seeing a few threads recently about cracking the spark plug insulators (and other consequences of doing so), i am wondering if people are using the tools as follows: 3/8 torque wrench --> extension --> U joint --> thin walled socket. This seems to be what the manual is stating to do, see attached photo. Attached Images
	Appreciate 0 Quote

04-16-2020, 01:59 PM	#80
badbread not good, but bad 333 Rep 361 Posts Drives: 2013 335i Join Date: Jun 2016 Location: Bay Area, CA iTrader: (3)	Yep, check out my spark plug guide DIY. Just go to my username .com and you'll see it.
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