E91 Straight Six Bearding

[MajorMantra]

Could I get a sanity check on my N52 oil change? It's a while since I last did this and I'm having a mental blank about how the filter assembly goes together. I think the little insert sits in the spring as pictured with the nipple pointing upwards, but I'm doubting myself. Does this look right?

Incidentally, most guides show the whole cage assembly remaining in the cap, but mine has separated both times I've had it out. Nothing appears to be broken, however.

[Swervin_Mervin]

Had some more misfiring issues. Happens under load when cold, which is unfortunate as to get home I join a d/c from a nearby roundabout, and you have to be "on it" as gaps are few and far between.

Anyway, turned off d/c, switched engine off and back on and it was fine again - just how it's been every time. However, 10mins later on a long 2-lane sliproad near the airport it did it again after I'd accelerated up to speed. So had to pull on to the hard shoulder at a really dodgy spot, to switch off an on again. Running fine again but the CEL is now one.

Going to check for codes tomorrow with my B-i-L's code reader and see what it says. I'm guessing it could be a multitude of different faults from coils/plugs, to DISA valves, to eccentric shaft sensor and so on. Time to start playing "hunt the problem"

[nitrodave]

Swervin_Mervin said:

Had some more misfiring issues. Happens under load when cold, which is unfortunate as to get home I join a d/c from a nearby roundabout, and you have to be "on it" as gaps are few and far between.

Anyway, turned off d/c, switched engine off and back on and it was fine again - just how it's been every time. However, 10mins later on a long 2-lane sliproad near the airport it did it again after I'd accelerated up to speed. So had to pull on to the hard shoulder at a really dodgy spot, to switch off an on again. Running fine again but the CEL is now one.

Going to check for codes tomorrow with my B-i-L's code reader and see what it says. I'm guessing it could be a multitude of different faults from coils/plugs, to DISA valves, to eccentric shaft sensor and so on. Time to start playing "hunt the problem"

Sounds like an ignition problem. Which engine do you have?

[Swervin_Mervin]

N52 330i

[Swervin_Mervin]

Ok, so I read the codes and have:

29CE Misfore on Cyl2
29D9 Misfire at low tank fill level

A bit of Googling about the latter suggests, in combination with the former, that it could be injector related.

I've cleared and will keep monitoring and see if it throws any codes without provocation.

I've a few other codes though, and not sure what to make of them. I suspect some may be historical:

FZD Roof function centre
00,01,A6, 70 no found!

No idea on that one!

CAS
A0B5 Fault, road speed signal
A0B2 Supply, Terminal 30 E/30L
A0B0 Input, Brake lights, implausible

Dicky wheel speed sensor?
Low Battery? (A0B2 is apparently power supply to the CAS)
?


CCC-BO[User Interface]
ABD2, Incorrect antenna

Radio/Diversity antenna related?

DSC
5DCC Hydraulic Unit: pressure sensor, internal
5DBC Hydraulic Unit: pressure sensor, plausibility

Wheels speed sensor related again?

Edited by Swervin_Mervin on Monday 15th April 09:51

[helix402]

If you have the N52 it won’t be an injector. It’ll be a plug or coil, probably a coil.

Clear fault code and swop coil to another cylinder. See if fault follows.

Re other faults, clear all and ignore until a warning light comes on. The abs ones will are due to a faulty internal pressure sensor in the abs unit and are an early warning that the abs unit will require a rebuild or replacement as some point.

[bodhi]

I've got the ABS Sensor issue on my 125i at the moment, basically the wheel speed sensor is getting strange readings, thinks the wheels are spinning and is cutting power in a way that does make it feel like it's misfiring, but I get the DTC light flashing rather than the EML.

Easy fix is just to turn DTC all the way off as I have done, drives much better now.

[330ti]

bodhi said:

I've got the ABS Sensor issue on my 125i at the moment, basically the wheel speed sensor is getting strange readings, thinks the wheels are spinning and is cutting power in a way that does make it feel like it's misfiring, but I get the DTC light flashing rather than the EML.

Easy fix is just to turn DTC all the way off as I have done, drives much better now.

Abs rings on your driveshafts have rusted. Have a look.

[Swervin_Mervin]

helix402 said:

If you have the N52 it won’t be an injector. It’ll be a plug or coil, probably a coil.

Clear fault code and swop coil to another cylinder. See if fault follows.

Re other faults, clear all and ignore until a warning light comes on. The abs ones will are due to a faulty internal pressure sensor in the abs unit and are an early warning that the abs unit will require a rebuild or replacement as some point.

Ta. Injector cropped up on a few N52 threads following coil and plug swap outs, and specifically with the misfire at low tank code.

I've cleared all codes for now and will monitor this week. Can hopefully find time at the weekend to check the plug over and try the coil swap if the plug appears ok. Trouble is it's inconsistent - not happening every day.

[bodhi]

330ti said:

bodhi said:

I've got the ABS Sensor issue on my 125i at the moment, basically the wheel speed sensor is getting strange readings, thinks the wheels are spinning and is cutting power in a way that does make it feel like it's misfiring, but I get the DTC light flashing rather than the EML.

Easy fix is just to turn DTC all the way off as I have done, drives much better now.

Abs rings on your driveshafts have rusted. Have a look.

Interesting, that may explain why it is intermittent and keeps fixing itself.

Any idea if it's a big fix?

[rallycross]

bodhi said:

Interesting, that may explain why it is intermittent and keeps fixing itself.

Any idea if it's a big fix?

Its really common I have had this done to a 125i and a 130i.
The ABS rings (reluctors) are only a few pounds each, fitting them requires d/shaft off, so depends how rusty the bolts are, could be 1hr job or 3 hr job if unlucky.

[zippyonline]

MajorMantra said:

Could I get a sanity check on my N52 oil change? It's a while since I last did this and I'm having a mental blank about how the filter assembly goes together. I think the little insert sits in the spring as pictured with the nipple pointing upwards, but I'm doubting myself. Does this look right?

Incidentally, most guides show the whole cage assembly remaining in the cap, but mine has separated both times I've had it out. Nothing appears to be broken, however.

Hmm, never seen this before. Mine's never come apart before.... I guess you sorted it?

Swervin_Mervin said:

helix402 said:

If you have the N52 it won’t be an injector. It’ll be a plug or coil, probably a coil.

Clear fault code and swop coil to another cylinder. See if fault follows.

Re other faults, clear all and ignore until a warning light comes on. The abs ones will are due to a faulty internal pressure sensor in the abs unit and are an early warning that the abs unit will require a rebuild or replacement as some point.

Ta. Injector cropped up on a few N52 threads following coil and plug swap outs, and specifically with the misfire at low tank code.

I've cleared all codes for now and will monitor this week. Can hopefully find time at the weekend to check the plug over and try the coil swap if the plug appears ok. Trouble is it's inconsistent - not happening every day.

Keep us posted. Coils are only £20 or so from ECP, make sure you get the right ones, there's 3 variants listed (Bosch iirc). Back when I ordered mine, the N52 happened to be the cheapest of the variants. If you get stuck, I have my old ones which did 190k miles or so, but were still fine (well apart from 1 which had a mis, but I replaced the whole lot anyway), you'd be welcome to borrow one.

rallycross said:

Its really common I have had this done to a 125i and a 130i.
The ABS rings (reluctors) are only a few pounds each, fitting them requires d/shaft off, so depends how rusty the bolts are, could be 1hr job or 3 hr job if unlucky.

Are you sure it was a 130i? My 330i (and when checking part numbers, I think also 335i and 335d..and possibly 330d) get drive speed from the wheel bearing, not a toothed ring on the driveshaft (coz larger driveshafts I think). So when you change your wheel bearing on those ones, make sure you put it in the right way round!

[330ti]

rallycross said:

bodhi said:

Interesting, that may explain why it is intermittent and keeps fixing itself.

Any idea if it's a big fix?

Its really common I have had this done to a 125i and a 130i.
The ABS rings (reluctors) are only a few pounds each, fitting them requires d/shaft off, so depends how rusty the bolts are, could be 1hr job or 3 hr job if unlucky.

Yep and if cv shaft is seized in hub.

[MajorMantra]

zippyonline said:

MajorMantra said:

Could I get a sanity check on my N52 oil change? It's a while since I last did this and I'm having a mental blank about how the filter assembly goes together. I think the little insert sits in the spring as pictured with the nipple pointing upwards, but I'm doubting myself. Does this look right?

Incidentally, most guides show the whole cage assembly remaining in the cap, but mine has separated both times I've had it out. Nothing appears to be broken, however.

Hmm, never seen this before. Mine's never come apart before.... I guess you sorted it?

I put it back together as pictured. Nothing obviously wrong, but I have this slight worry that if I've done it wrong, some oil might be bypassing the filter. I've done some pretty extensive googling and cannot find a single picture confirming that I have it right! (Nor that I have it wrong, however.)

[Mr Tidy]

cerb4.5lee said:

Nice one Mr Tidy I will look forward to seeing the pics. It sounds like it has some very nice rare options on it.

Thanks, I'm loving it.

I put a photo on the "Show us your BMW" thread, but here is the 330i.



I suppose I'll have to leave this thread now though.

Still it isn't all bad news as I sold my 325i last night!

Lucky how they are both Sparkling Graphite with light interiors - 325i has Lemon leather, 330i has beige leather with wood trim. I really wouldn't have wanted black seats.

[cerb4.5lee]

Mr Tidy said:

cerb4.5lee said:

Nice one Mr Tidy I will look forward to seeing the pics. It sounds like it has some very nice rare options on it.

Thanks, I'm loving it.

I put a photo on the "Show us your BMW" thread, but here is the 330i.



I suppose I'll have to leave this thread now though.

Still it isn't all bad news as I sold my 325i last night!

Lucky how they are both Sparkling Graphite with light interiors - 325i has Lemon leather, 330i has beige leather with wood trim. I really wouldn't have wanted black seats.

Very nice and a lovely colour combo. Chuffed that you eventually got hold of a 330i because I know you'd fancied one for a while.

[Mr Tidy]

cerb4.5lee said:

Very nice and a lovely colour combo. Chuffed that you eventually got hold of a 330i because I know you'd fancied one for a while.

Thanks.

I liked the 325i, but compared to my Z4 Coupe it just felt a bit "flat" - the 330i doesn't!

[MajorMantra]

Has anyone had any issues with their power steering? Mine suddenly feels oddly light and vague today and I can't pin down why. I thought I detected a slight humming when turning right at low speed.

Does a failing power steering pump seem most likely?

EDIT: My power steering fluid is ever so slightly below the low mark. I'd be surprised if it could make that much difference, but I'll top it up and see...

Edited by MajorMantra on Saturday 27th April 15:14

[survivalist]

Mr Tidy said:

cerb4.5lee said:

Very nice and a lovely colour combo. Chuffed that you eventually got hold of a 330i because I know you'd fancied one for a while.

Thanks.

I liked the 325i, but compared to my Z4 Coupe it just felt a bit "flat" - the 330i doesn't!

That’s interesting. One of the things I really liked about the 325i was the change in urgency above 4000rpm. That was 10 years ago though, so may be wearing rose tinted spectacles. Now have a 130i and am considering the evolve remap which is said to do just that to the 3L N52.

[MajorMantra]

MajorMantra said:

Has anyone had any issues with their power steering? Mine suddenly feels oddly light and vague today and I can't pin down why. I thought I detected a slight humming when turning right at low speed.

Does a failing power steering pump seem most likely?

EDIT: My power steering fluid is ever so slightly below the low mark. I'd be surprised if it could make that much difference, but I'll top it up and see...

Edited by MajorMantra on Saturday 27th April 15:14

Sorry, quoting myself... Reading around it seems possible it could be the steering rack rather than the pump. Anyone got any pointers on making a definitive diagnosis?