E90Post
 


 
BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > UK > UK Technical Forum > Avoiding Diesel Issues



Reply
 
Thread Tools Search this Thread
      12-10-2015, 09:24 AM   #1
Vish8895
Captain
Vish8895's Avatar
United Kingdom
73
Rep
641
Posts

Drives: E92 M3 6MT
Join Date: Sep 2013
Location: Staffs, UK

iTrader: (0)

Avoiding Diesel Issues

Hi all,

I have recently purchased a 325D with 67K miles. I am conscious of carbon build up (CBU) and was wondering if anyone had any input to my query.

I wondered if you guys are aware of tell tale signs to look out for on a diesel car suffering from CBU? I have Carly for BMW and regularly scan for codes (of which there have been none since clearing it before the test drive last week). I also have looked a the DPF section in Carly but it doesn't mean a lot to me at the minute as I don't know what healthy readings would be...

I have and will continue to only run on V-Power and often use the rev range when warm to try and agitate carbon build up and give the car a good clear out.

Any advice appreciated.

Thanks
Appreciate 0
      12-11-2015, 04:08 AM   #2
Aragorn30d
Lieutenant Colonel
175
Rep
1,596
Posts

Drives: E90 330d
Join Date: Mar 2015
Location: Fife

iTrader: (0)

Clean the manifold out and Delete the EGR if your worried about it.

My engines on 147k and i was actually quite surprised when i had the manifold off. Yes, there are some deposits, but nothing spectacular.
Appreciate 0
      12-11-2015, 05:14 AM   #3
Vish8895
Captain
Vish8895's Avatar
United Kingdom
73
Rep
641
Posts

Drives: E92 M3 6MT
Join Date: Sep 2013
Location: Staffs, UK

iTrader: (0)

I think I'll be leaving the EGR for the time being. How long did it take you to remove and clean the intake manifold? Might make this a mini-project for the new year.
Appreciate 0
      12-11-2015, 06:12 AM   #4
abeardo83
Captain
abeardo83's Avatar
United Kingdom
96
Rep
828
Posts

Drives: E92 M3
Join Date: Nov 2015
Location: Cheshire

iTrader: (2)

Garage List
2008 BMW M3  [0.00]
You're worrying over nothing at 65k. My good lady's 325d is on 154k miles. DPF light has juct come on. Did a forced regen and it removed 50g of soot. Drives like new again.
Appreciate 0
      12-11-2015, 07:58 AM   #5
Aragorn30d
Lieutenant Colonel
175
Rep
1,596
Posts

Drives: E90 330d
Join Date: Mar 2015
Location: Fife

iTrader: (0)

It took maybe an hour or so to get the manifold off. Its not particularly hard, just lots of dismantling.

I did mine as i wanted to replace the glowplugs and blank the swirl flaps.

I didnt clean my manifold. ideally you'd want some thin pipe cleaners and some sort of solvent that was going to dissolve the gunk but not harm the plastic manifold. I didnt have either, and it was such a thin layer on the sides that it wasnt worth messing with.


abeardo: if the DPF isnt regenerating automatically you need to make sure the engines warming up properly (thermostats) and make sure it gets a decent run every couple hundred miles.
Appreciate 0
      12-11-2015, 10:46 AM   #6
Vish8895
Captain
Vish8895's Avatar
United Kingdom
73
Rep
641
Posts

Drives: E92 M3 6MT
Join Date: Sep 2013
Location: Staffs, UK

iTrader: (0)

Thanks for the input fellas. I'm just trying to make sure I don't run into problems. The engine probably only gets warm a few times a week so on the weekends I try to do a good 20 miles+ on the motorway to allow it to regen and to allow me to boot it a bit.
Appreciate 0
      12-13-2015, 04:51 AM   #7
Aragorn30d
Lieutenant Colonel
175
Rep
1,596
Posts

Drives: E90 330d
Join Date: Mar 2015
Location: Fife

iTrader: (0)

I guess the critical thing is ensuring that it IS warming up. Faulty thermostat might mean even on your 20mile drive its not getting to temp!
Appreciate 0
      12-13-2015, 10:03 AM   #8
Vish8895
Captain
Vish8895's Avatar
United Kingdom
73
Rep
641
Posts

Drives: E92 M3 6MT
Join Date: Sep 2013
Location: Staffs, UK

iTrader: (0)

Yes that is something I have thought about. There are no codes being thrown at all currently, would the stat throw a code?

Also, the coolant temp was a stable 87 Degrees-C after a nice drive the other day, is that the avg coolant temp for the car when warmed up? I noticed the diesels don't have a temp gauge like my 335i did :/.
Appreciate 0
      12-13-2015, 03:10 PM   #9
Aragorn30d
Lieutenant Colonel
175
Rep
1,596
Posts

Drives: E90 330d
Join Date: Mar 2015
Location: Fife

iTrader: (0)

yeh 87c is about right
Appreciate 0
      12-13-2015, 06:13 PM   #10
Digitalize
Photographer
Digitalize's Avatar
United Kingdom
407
Rep
2,643
Posts

Drives: 320D
Join Date: Jun 2013
Location: UK

iTrader: (0)

Thermostats won't produce an error code.

87c sounds like they're both working fine.
Appreciate 0
      12-14-2015, 12:31 AM   #11
Pumper
Private First Class
Lithuania
21
Rep
147
Posts

Drives: 2007 E91 320D
Join Date: Dec 2013
Location: Lithuania

iTrader: (0)

+1 on 87C being a good temp for normal driving conditions. Would get to 90-91 when pushed a bit harder.
__________________
Appreciate 0
      12-14-2015, 02:06 AM   #12
abeardo83
Captain
abeardo83's Avatar
United Kingdom
96
Rep
828
Posts

Drives: E92 M3
Join Date: Nov 2015
Location: Cheshire

iTrader: (2)

Garage List
2008 BMW M3  [0.00]
Quote:
Originally Posted by Aragorn30d View Post
It took maybe an hour or so to get the manifold off. Its not particularly hard, just lots of dismantling.

I did mine as i wanted to replace the glowplugs and blank the swirl flaps.

I didnt clean my manifold. ideally you'd want some thin pipe cleaners and some sort of solvent that was going to dissolve the gunk but not harm the plastic manifold. I didnt have either, and it was such a thin layer on the sides that it wasnt worth messing with.


abeardo: if the DPF isnt regenerating automatically you need to make sure the engines warming up properly (thermostats) and make sure it gets a decent run every couple hundred miles.

I think it was just at the point where the DPF was nearly full with the sooty remains from the regens tbh. The garage did a forced regen and a Terraclean and *touch wood*, it seems to have sorted it.
That Terraclean is good stuff, it seems. Car really pulls again now. Am thinking of giving it a go on my 335i at some point.

Last edited by abeardo83; 12-14-2015 at 02:20 AM..
Appreciate 0
      12-14-2015, 02:29 AM   #13
Aragorn30d
Lieutenant Colonel
175
Rep
1,596
Posts

Drives: E90 330d
Join Date: Mar 2015
Location: Fife

iTrader: (0)

From what i've seen, terraclean doesnt do much at all.

They claim it cleans carbon buildup and other random claims, but its injected into the cylinders just like the fuel, so its no more likely to clean carbon than the petrol/diesel does on any normal day.

Some additives can help clean the DPF, i think essentially by burning hotter and getting the EGT's higher.
Appreciate 0
      12-14-2015, 02:39 AM   #14
abeardo83
Captain
abeardo83's Avatar
United Kingdom
96
Rep
828
Posts

Drives: E92 M3
Join Date: Nov 2015
Location: Cheshire

iTrader: (2)

Garage List
2008 BMW M3  [0.00]
Quote:
Originally Posted by Aragorn30d View Post
From what i've seen, terraclean doesnt do much at all.

They claim it cleans carbon buildup and other random claims, but its injected into the cylinders just like the fuel, so its no more likely to clean carbon than the petrol/diesel does on any normal day.

Some additives can help clean the DPF, i think essentially by burning hotter and getting the EGT's higher.
Dunno what did what then, but all I know is that there was an awful amount of cr@p coming out of the back of the car during the session. Could have been the Terraclean, could have been the forced regen, who knows.

All I know is that the amber DPF light is gone and the car is far more eager now.
Appreciate 0
      12-14-2015, 05:23 AM   #15
Vish8895
Captain
Vish8895's Avatar
United Kingdom
73
Rep
641
Posts

Drives: E92 M3 6MT
Join Date: Sep 2013
Location: Staffs, UK

iTrader: (0)

Glad to hear 87DC sounds spot on! Always like to make sure the cars running sweet .

Does anyone use carly for BMW? Just wondering what the normal DPF readings look like as I have nothing to compare mine to!
Appreciate 0
      12-14-2015, 05:34 AM   #16
Pumper
Private First Class
Lithuania
21
Rep
147
Posts

Drives: 2007 E91 320D
Join Date: Dec 2013
Location: Lithuania

iTrader: (0)

Quote:
Originally Posted by Vish8895 View Post
Glad to hear 87DC sounds spot on! Always like to make sure the cars running sweet .

Does anyone use carly for BMW? Just wondering what the normal DPF readings look like as I have nothing to compare mine to!
Was monitoring my DPF and temp a couple of weeks ago on a highway trip.

Soot mass was over 31g at the begining with ~420km since last regen.

When the engine temp reached ~80C, the exhaust strarted to heat up from ~360C to ~550C. That's when the soot started to being burt away - took maybe 15 or 20 km to get to almost 0g.
After the regen finished, engine temp dropped from ~91C to ~89C, exhaust back to 360~380C and by the time I stopped the car (after ~90 km) soot mass got up to ~4.5g.

Did not see higher revs or lower MPG (might be because I get crap mpg to begin with) during the regen. Was driving at ~70-75mph.
__________________
Appreciate 0
      12-14-2015, 06:45 AM   #17
mob17
Major General
mob17's Avatar
United Kingdom
399
Rep
5,623
Posts

Drives: E92 335D
Join Date: Mar 2012
Location: East Midlands, UK

iTrader: (5)

Meth will help
Appreciate 0
      12-14-2015, 07:39 AM   #18
Vish8895
Captain
Vish8895's Avatar
United Kingdom
73
Rep
641
Posts

Drives: E92 M3 6MT
Join Date: Sep 2013
Location: Staffs, UK

iTrader: (0)

Quote:
Originally Posted by Pumper View Post
Was monitoring my DPF and temp a couple of weeks ago on a highway trip.

Soot mass was over 31g at the begining with ~420km since last regen.

When the engine temp reached ~80C, the exhaust strarted to heat up from ~360C to ~550C. That's when the soot started to being burt away - took maybe 15 or 20 km to get to almost 0g.
After the regen finished, engine temp dropped from ~91C to ~89C, exhaust back to 360~380C and by the time I stopped the car (after ~90 km) soot mass got up to ~4.5g.

Did not see higher revs or lower MPG (might be because I get crap mpg to begin with) during the regen. Was driving at ~70-75mph.
Ah ok thanks for the readings! Mine was at 2g when I arrived home after work the other day.

I've been taking it for a good motorway blast every weekend so hopefully that gives it time to regen if it needs it.


Quote:
Originally Posted by mob17 View Post
Meth will help
Yes I understand meth will indeed help the CBU, maybe if i tell the insurance its a preventative maintenance modification rather than performance they might not probe me to death for it
Appreciate 0
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 09:13 AM.




e90post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST