E91 Straight Six Bearding

E91 Straight Six Bearding

Author
Discussion

helix402

7,832 posts

181 months

Thursday 28th November 2019
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A lot of tyre fitters will balance a wheel and still see a 5/10g discrepancy post balancing and still fit the wheel.

Most mildly bent wheels can be properly balanced and subsequently fitted without issue.

Swervin_Mervin

4,429 posts

237 months

Thursday 28th November 2019
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In my case I know for a fact my wheels are straight. 1 was actually new! But the garage even checked for wheels out of true (whilst I watched) and they were bang on.

I'm convinced it's the tyres. The fronts are fine, were bought at a separate time and the front wheels have previously been straightened so more likely to still be out a little.

ferrisbueller

29,260 posts

226 months

Thursday 28th November 2019
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Can you return/exchange tyres?

Swervin_Mervin

4,429 posts

237 months

Thursday 28th November 2019
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Bit late for me now I'm down to 4-5mm laugh They did enough of a job at getting them balanced in the end - it's now only noticeable at certain speeds on a select few roads, so I decided to leave it.

gizlaroc

17,251 posts

223 months

Thursday 28th November 2019
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I was anal about getting them all zeroed for the F11.

He took nearly three quarters of an hour, two of them were well tricky.


stevesingo

4,848 posts

221 months

Friday 29th November 2019
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st wheel balancing grips my st.

Oh, don't worry sir, you won't feel 5g. I will you knob, because that 5g might be 7.499g or even 9.999g depending on how the machine works, so get it right now otherwise you will be doing it again until you do.

When I worked in the motor trade, If I had to fit tyres, I spun up the wheel with just the valve in first, to see if it was miles out, or even straight. The machine we used could be set for 1, 5 or 10g accuracy. Some of my colleagues set to 5g and I asked, what's the point? Why not set it to 1g, and if you are happy with 5g, when it shows 5g then just say you are done. I always tried to get to 2g. Getting to 0g was a faff including cutting weights and weighing them on the paint shop digital scales.

So the annoying thing is that it is not a highly skilled task, just people can't be arsed to do it.


zippyonline

Original Poster:

354 posts

165 months

Friday 29th November 2019
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All this talk is making me look at the price of wheel balancers on ebay!

AmirGSXR

761 posts

150 months

Friday 29th November 2019
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Thanks for all the replies.

I went back to my tyre place and they tried to re-balance them this morning. Both wheels required a lot of weight, one in particular over 200g. The vibration is less now, but still there.

Although the inside of the rim did not look bent to the naked eye, when looking at one spot on the rim, I could notice an 'up&down' movement as it was spinning on the balance machine. It is possible the alloys are out of true...but it could be the tyres, given that I didn't have issues with the old tyres that came off. I just do not know...

In summary, both wheels now have ALOT of weights on them, and I don't think there is much more that can be done from a balancing perspective. I may have to see how I go with it and then take it to an alloy refurbisher and ask them to check if wheel is buckled.

It's annoying to get this issue, as I need to spend money sorting out the dead iDrive CCC, and possibly replacing the electric coolant pump (I have the missing communication and thermostat inactivation codes).

Swervin_Mervin

4,429 posts

237 months

Friday 29th November 2019
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An out of true wheel should be possible to balance though, unless it's especially bad. I had a v. bad front one that ultimately got repaired, but a good tyre fitter I used managed to balance it out. It sounds more like a fault with the tyre. I thought I had a lot of weights on mine but nowhere near 200g!!

tenmantaylor

406 posts

97 months

Friday 29th November 2019
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Hi all,

Got an e91 320d (remapped to 225hp yo!). Not quite the E92 M3 it replaced but it does the job for 300 miles a week! Hence:

Pretty much all the shocks are on the way out so rather than pay to have all replaced was thinking whats a good entry level upgrade that improves the car over standard OEM?

Not looking to change ride height / firmness etc. Just looking for better quality damping/handling.

Cars in for MOT Tuesday so hoping to order/pickup something up today/tomorrow and free issue to indy garage doing the work.

Cheers!

helix402

7,832 posts

181 months

Friday 29th November 2019
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Bilstein B6.

JakeT

5,406 posts

119 months

Saturday 30th November 2019
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Probably the B6 too. B4 if you're not feeling too spendy. Mine has B8 sprint dampers from Birds on the front and rear and it's quite firm.


Serviced mine again today. A little earlier than I would have like, with only about 8,700 miles covered between services. I know I've got absolutely no time between now and New Years to do it though, and December is shaping up to be a mileage heavy month. Last service was only in July!

stevesingo

4,848 posts

221 months

Saturday 30th November 2019
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tenmantaylor said:
Hi all,

Got an e91 320d (remapped to 225hp yo!). Not quite the E92 M3 it replaced but it does the job for 300 miles a week! Hence:

Pretty much all the shocks are on the way out so rather than pay to have all replaced was thinking whats a good entry level upgrade that improves the car over standard OEM?

Not looking to change ride height / firmness etc. Just looking for better quality damping/handling.

Cars in for MOT Tuesday so hoping to order/pickup something up today/tomorrow and free issue to indy garage doing the work.

Cheers!
I M Sport, B8, if not B6.

I have B8s with Eibach springs. Yes it is firm, but with non-RFTs (18"), it is better than stock with RFTs.

tenmantaylor

406 posts

97 months

Saturday 30th November 2019
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Cheers, I’ve been looking at B12s. Are they good too?

I’ve finally got the run flats off. Dunlop sport max gt all round now, happy with them. Not ps4s but a lot cheaper. 18in.

stevesingo

4,848 posts

221 months

Saturday 30th November 2019
quotequote all
I have B12s, and I like them.

I used the kit for E91 6cyl petrol on my E90 6cyl petrol as the spring rates are slightly higher and therefore I avoided a drop in ride height. It is still within stock E90 6 cyl Msport spec on ride height.

phil_cardiff

7,041 posts

207 months

Sunday 1st December 2019
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I thought B12s were a spring and damper kit?

ATM

18,091 posts

218 months

Sunday 1st December 2019
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The b12 kit is just their dampers and eibach springs which are matched - so yes both. Or have they started making their own springs now?

Normally b8 dampers are included but some kits are b6 it depends on the car. I have b12 on my 550i and that has b8 dampers.

The b8 and b6 are supposed to be similar firmness but the b8 is designed for shorter travel applications.

https://www.bilstein-shocks.co.uk/blogs/news/whats...

Swervin_Mervin

4,429 posts

237 months

Sunday 1st December 2019
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Mine went in last week to have the front bumper tidied up. It had been hit a couple of years ago - just a low speed parking bump i think, which had deformed the sharp creases to the left of the number plate. Wasn't that obvious so I left it but over time it started to lose paint. Along with the usual age related stone chip rash, which had got fairly bad, it just meant it was looking a bit scruffy from within 6ft or so.

I assumed it would be a new bumper skin job but no - they reckoned it was repairable to as good as new. Pretty chuffed with the end results I must say.



The only thing is those chromed bolt heads showing under each side near the splitters. I assume there should be a fixing here (I've never looked that closely) but that they should be black - looks that way looking at realoem

LordHaveMurci

12,034 posts

168 months

Sunday 1st December 2019
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Pretty sure those splitters are missing on my OH's car.

No point replacing them I don't think hehe

Swervin_Mervin

4,429 posts

237 months

Sunday 1st December 2019
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They're probably there, you just haven't noticed them. I was the same til i picked this back upnthe other day. They've given them a good clean - they look like they've possibly been rejuvenated in some way as well (spray or heat maybe) and maybe just stand out more now against the clean new paint as well