Damn Dealership!

[kwike92]

so my m3 with 17k miles which i just got (i traded in my 09 m3 with 82k miles) has a slight vibration at 85mph++ and i road tested it on all kinds of highways just to make sure i wasnt trippin... and it does infact vibrate...this is the second time i have broughten it back... and they say " we can not verify the concern" and that its "normal" at those speeds if it is vibrating...

isnt this car designed to go fast? lol

what to do?

[Krozi]

Need to dish out the $$ to get the tires road forced and balanced. Go to a different dealer though, this one seems stupid.

Sometimes they also have to spin the tire to a different spot on the wheel to get the road force down. You really want the road force value to be under 10.

[kwike92]

Originally Posted by Krozi

Need to dish out the $$ to get the tires road forced and balanced. Go to a different dealer though, this one seems stupid.

Sometimes they also have to spin the tire to a different spot on the wheel to get the road force down. You really want the road force value to be under 10.

how much is a road force balance?

[Krozi]

Originally Posted by kwike92

how much is a road force balance?

I guess it varies...I pay about $75. It varies from $60-150 I would say.

Tell them to please get the road force below 10 and also ask for a printout of the values.

[kwike92]

sounds good..thank u

[persian54]

Originally Posted by kwike92

how much is a road force balance?

It's worth it


Also check your tires to make sure you don't have chunks and such...

[Darth One]

i might have to do this. i have the same problem.

better yet, time for new wheel/tire combo

[tibra1]

Hmmm I have never used road force balance..just normal balancing..and I have no vibration issues...even with spacers all around...lucky i guess?

[Singletrack]

Have your alignment checked, check your tire pressure, and have them put the "normal to vibrate" in writing. Then send the last item to BMW USA to let them know that dealers are telling people that 70k cars vibrate. What tools.

[Malek@MRF]

Eric,

There is a very high chance they over inflated your tires. It is mandatory by law to check and adjust air pressures in every car at service centers (in this case, the dealership) before the car leaves. The technician does not care, and just usually puts 40-45PSI in the tires.

The M3 is very sensitive to this, and if over inflated, will induce vibration.

Malek

[Singletrack]

Originally Posted by Malekreza11

Eric,

There is a very high chance they over inflated your tires. It is mandatory by law to check and adjust air pressures in every car at service centers (in this case, the dealership) before the car leaves. The technician does not care, and just usually puts 40-45PSI in the tires.

The M3 is very sensitive to this, and if over inflated, will induce vibration.

Malek

Totally!

Was very impressed to see that Rahal BMW not only did a solid alignment on my car, but nailed the proper pressure. First dealership ever! ; )

Even most custom shops (around me) that specialize in large wheels, etc. will over-inflate the tires to "protect the wheels from potholes". : P

[Krozi]

Originally Posted by tibra1

Hmmm I have never used road force balance..just normal balancing..and I have no vibration issues...even with spacers all around...lucky i guess?

Very. LOL

[kwike92]

Originally Posted by Malekreza11

Eric,

There is a very high chance they over inflated your tires. It is mandatory by law to check and adjust air pressures in every car at service centers (in this case, the dealership) before the car leaves. The technician does not care, and just usually puts 40-45PSI in the tires.

The M3 is very sensitive to this, and if over inflated, will induce vibration.

Malek

thanks malek,


i read the Repair order and it said they did inflate the tires to specs, but i haven't checked them myself, ill check them tomorrow in the afternoon when I'm off work.

thanks bro.

[kwike92]

Originally Posted by Singletrack

Have your alignment checked, check your tire pressure, and have them put the "normal to vibrate" in writing. Then send the last item to BMW USA to let them know that dealers are telling people that 70k cars vibrate. What tools.

yeah no shit huh?...70k car normal to vibrate? lol thats exactly what i was thinking...

[saeedg48]

stealership!?

[Moxie]

Originally Posted by Malekreza11

Eric,

There is a very high chance they over inflated your tires. It is mandatory by law to check and adjust air pressures in every car at service centers (in this case, the dealership) before the car leaves. The technician does not care, and just usually puts 40-45PSI in the tires.

The M3 is very sensitive to this, and if over inflated, will induce vibration.

Malek

Originally Posted by kwike92

thanks malek,


i read the Repair order and it said they did inflate the tires to specs, but i haven't checked them myself, ill check them tomorrow in the afternoon when I'm off work.

thanks bro.

US Spec cars in Europe come with a door jamb sticker telling us to inflate cold to 41 PSI front & 44 PSI rear for speeds over 100 MPH. Keep mine @ 39 & 41. No issues ever - Wear is even.

[Singletrack]

Originally Posted by Moxie

US Spec cars in Europe come with a door jamb sticker telling us to inflate cold to 41 PSI front & 44 PSI rear for speeds over 100 MPH. Keep mine @ 39 & 41. No issues ever - Wear is even.

Same in US spec cars in US too. The car has a lot more grip at lower tire pressures though in my experience. Although sometimes I do inflate them more to get it to rotate a little better.

[tibra1]

ZCP inflation is 35F 36R according to the door jam sticker

[Singletrack]

Originally Posted by tibra1

ZCP inflation is 35F 36R according to the door jam sticker

Interesting. The 220s (19s) are 33/35.