[AustinMiles263]

So I used to own a 2016 320d with a B47 engine in it, bought it at 29k km and unfortunately i got involved in an accident at 46k km, never had any issues with the engine except right headlight main module that failed and changing brakes all around

After getting money from the insurance I ended up buying a 2015 320d with a N47 engine. I did this to save money since I had other pressing issues. Mileage is 105k km. Have little knowledge about its service history but I do plan to use it for the longest.

Here are my questions. These engines usually have DPF issues, and all those emission related problems. Here in my country, they really don’t care about those emission regulations so I plan to do DPF delete, EGR delete, cats delete, through in a straight pipe and maybe a stage one tune for some extra horses. Any issues that I might run into after doing all these changes? Or would you recommend I do or leave it stock?

[dieselwagon]

I am sure that there will be a bunch of more knowledgeable people along shortly, but from what I have been told and researched - oil change, oil change and oil change.

Dont leave it too long between the changes and it might even be a good idea to change the oil before the car says so (condition based). It doesnt fix everything, but it does minimize a lot of the problems and helps reduce the potential instances of failures.

And something that I dont know though - is this the N47 or the later N47T? The T resolved a few issues, but still has some others. Do you know what variant it is?

[AustinMiles263]

Originally Posted by dieselwagon

I am sure that there will be a bunch of more knowledgeable people along shortly, but from what I have been told and researched - oil change, oil change and oil change.

Dont leave it too long between the changes and it might even be a good idea to change the oil before the car says so (condition based). It doesnt fix everything, but it does minimize a lot of the problems and helps reduce the potential instances of failures.

And something that I dont know though - is this the N47 or the later N47T? The T resolved a few issues, but still has some others. Do you know what variant it is?

So I’m actually not sure but it’s from 2015, probably the last version of the N47 engine before they moved on to the B47. Here’s my vin number: WBA3D36070NT54625, if you can check it that’ll be helpful. When it comes to oil changes I’m very strict, I do my oil changes every 7,000km and I also change, the air filter, oil filter and also the diesel filter since here where I live our fuel quality is said to be not that good.

[AustinMiles263]

Originally Posted by AustinMiles263

So I used to own a 2016 320d with a B47 engine in it, bought it at 29k km and unfortunately i got involved in an accident at 46k km, never had any issues with the engine except right headlight main module that failed and changing brakes all around

After getting money from the insurance I ended up buying a 2015 320d with a N47 engine. I did this to save money since I had other pressing issues. Mileage is 105k km. Have little knowledge about its service history but I do plan to use it for the longest.

Here are my questions. These engines usually have DPF issues, and all those emission related problems. Here in my country, they really don’t care about those emission regulations so I plan to do DPF delete, EGR delete, cats delete, through in a straight pipe and maybe a stage one tune for some extra horses. Any issues that I might run into after doing all these changes? Or would you recommend I do or leave it stock?

I just checked it’s an N47T

[dieselwagon]

Ah cool - the T variant is supposed to have improved timing guides and chains, which is 'supposed' to fix the problems that occurred with the N47 version. Its the technical update version, so it should be better - which is good news.

[AustinMiles263]

Originally Posted by dieselwagon

Ah cool - the T variant is supposed to have improved timing guides and chains, which is 'supposed' to fix the problems that occurred with the N47 version. Its the technical update version, so it should be better - which is good news.

Thanks for the feedback, I also checked with my trusted tuning company, they actually recommended the deletes, but advised that I use the car for at least two months checking if there are any issues that needs to tended to before tuning

[TurboWeasel]

Originally Posted by AustinMiles263

So I’m actually not sure but it’s from 2015, probably the last version of the N47 engine before they moved on to the B47. Here’s my vin number: WBA3D36070NT54625, if you can check it that’ll be helpful. When it comes to oil changes I’m very strict, I do my oil changes every 7,000km and I also change, the air filter, oil filter and also the diesel filter since here where I live our fuel quality is said to be not that good.

You will be fine with 7000 KM oil changes. I drop the oil on my N57 330d every 3000 miles.

Fit the newest upper chain tensioner and keep up with the regular oil changes and it will be fine.

Use the best quality fuel available as your injectors and HPFP will thank you for it. I only use Shell V Power diesel.

[Watsey]

There are many components on the car that don’t require servicing as such, but the drivetrain absolutely will benefit from enhanced maintenance.

I change the engine oil (drain it, not pump it out), oil filter, and air filter every 7K miles, and use an engine oil flush additive every time. I also installed a magnetic sump plug to help catch ferrous fines.

I change the transmission fluid and pan/filter every 40k miles, and will be reducing the mileage between diff oil changes to 20K miles.

Personally I’d leave the DPF in place (because they are free-flowing if they are in good condition, and hugely reduce soot particulates), but the EGR most likely causes more harm (fouling of the inlet tract and ports, which reduces performance and economy) than good (NO2 reduction).

[ssf556]

Delete it asap....get rid of the EGR.

[AustinMiles263]

Originally Posted by ssf556

Delete it asap....get rid of the EGR.

Thanks you

[wysodzky_]

In Europe, we basically clean the intake manifold. Change the intake manifold gasket (some versions have swirl flaps integrated to the gasket and they become loose). We change the timing chain near 200 000km. It is important to keep oil changes near 10k km.
We also had service action for changing egr cooler which might leak. It is good also to blank the egr and reprogram ecu together.

I ran stage 1 (only ecu tune) with nothing deleted (egr, dpf still in). No problems.
If its really 105k km then I would just stick with regular oil changes right now.

[AustinMiles263]

Originally Posted by wysodzky_

In Europe, we basically clean the intake manifold. Change the intake manifold gasket (some versions have swirl flaps integrated to the gasket and they become loose). We change the timing chain near 200 000km. It is important to keep oil changes near 10k km.
We also had service action for changing egr cooler which might leak. It is good also to blank the egr and reprogram ecu together.

I ran stage 1 (only ecu tune) with nothing deleted (egr, dpf still in). No problems.
If its really 105k km then I would just stick with regular oil changes right now.

Much appreciated, I think the N47T have swirl flaps. Once the car gets close to 200,000km some also say the swirl flaps might clog or gets loose. How do you guys deal with that, swirl flaps delete or replace with new ones

[wysodzky_]

In my case
https://www.realoem.com/bmw/enUS/sho...diagId=11_5442

I just changed number 2, the gasket has swirl flaps in itself so just changed the gasket and they are like new. Some n47 have swirl flaps integrated with manifold and then the best idea is to remove them I think otherwise you would need to change whole intake manifold. But if you will have the one like mine just replace the gasket I think.
My engine specific code is N47D20C

[AustinMiles263]

Originally Posted by wysodzky_

In my case
https://www.realoem.com/bmw/enUS/showparts?id=3P11-EUR-04-2014-F32-BMW-420d&diagId=11_5442

I just changed number 2, the gasket has swirl flaps in itself so just changed the gasket and they are like new. Some n47 have swirl flaps integrated with manifold and then the best idea is to remove them I think otherwise you would need to change whole intake manifold. But if you will have the one like mine just replace the gasket I think.
My engine specific code is N47D20C

My engine is N47T - N47D20C

[Watsey]

Originally Posted by AustinMiles263

Much appreciated, I think the N47T have swirl flaps. Once the car gets close to 200,000km some also say the swirl flaps might clog or gets loose. How do you guys deal with that, swirl flaps delete or replace with new ones

Neither.

Find a good Indy that has an ultrasonic bath. When I had my IM cleaned that way it came out literally factory fresh.