E9x M3 Technical Thread
- Thread starter golfgti
- Start date
Re: E9x M3 Technical Thread
For regular tracker's, I'd change the differential oil every 45,000km. Manual states something like 60k or something but I prefer doing it earlier for all fluids.
For regular tracker's, I'd change the differential oil every 45,000km. Manual states something like 60k or something but I prefer doing it earlier for all fluids.
Re: E9x M3 Technical Thread
No One stocks up Pagids for BMW
Only for Porsches
1. For occasional track use, I trust the Performance Friction PFC01 for the front and 97 at the back. Dont use them for daily at all. Else Ferodo DS2500 is a great all rounder that I hv ever used.
U can buy them online, Google Zeckhausen Racing and u will get it. He's my regular supplier back in the old days.
No One stocks up Pagids for BMW
Only for Porsches
1. For occasional track use, I trust the Performance Friction PFC01 for the front and 97 at the back. Dont use them for daily at all. Else Ferodo DS2500 is a great all rounder that I hv ever used.
U can buy them online, Google Zeckhausen Racing and u will get it. He's my regular supplier back in the old days.
Re: E9x M3 Technical Thread
Not alot of Sachs C/O for street applications being used and in local context, i think it's zero.
Tho Sachs makes really top end race caliber suspensions used in touring cars, F1 to name a few.
If u dont intend to track much, why bother changing to c/o...
think stock EDC is good enough. Unless u want to go more into serious tracking and putting on semis or slicks tires etc then I say keep it stock
rathoras;600289 said:
Not alot of Sachs C/O for street applications being used and in local context, i think it's zero.
Tho Sachs makes really top end race caliber suspensions used in touring cars, F1 to name a few.
If u dont intend to track much, why bother changing to c/o...
think stock EDC is good enough. Unless u want to go more into serious tracking and putting on semis or slicks tires etc then I say keep it stock
powersteer
Well-Known Member
Re: E9x M3 Technical Thread
Diff lube shd be changed more regularly esp when the diff is new and the surfaces need to "run-in"
I drained my diff fluids at 1k and 10k, the oil still contain lots of tiny metal particles which will wreck havoc in a non filtered oil bath. I will continue to change my diff fluids every 10k or 20k depending on usage .. cos its cheap, not worth the savings
Diff lube shd be changed more regularly esp when the diff is new and the surfaces need to "run-in"
I drained my diff fluids at 1k and 10k, the oil still contain lots of tiny metal particles which will wreck havoc in a non filtered oil bath. I will continue to change my diff fluids every 10k or 20k depending on usage .. cos its cheap, not worth the savings
clar
Well-Known Member
Re: E9x M3 Technical Thread
Agree! I changed mine twice and the mileage on my car is only 12k. On the first change around 8k, the oil looked like black sludge with tiny metal bits in it. I changed it again the 2nd time as the first change didn't rectify the grinding noise. The noise has since faded away some what.
powersteer;600526 said:
Agree! I changed mine twice and the mileage on my car is only 12k. On the first change around 8k, the oil looked like black sludge with tiny metal bits in it. I changed it again the 2nd time as the first change didn't rectify the grinding noise. The noise has since faded away some what.
Re: E9x M3 Technical Thread
Very normal issues with the M3s'.
You guys can try doing the below after changing your differential oil as it worked for me.
For everyone who experiences this noise and has it quieted with a diff fluid additive, don't be surprised if the noise comes back. To some extent, it is the clutch packs in the LSD doing what they are designed to do. The noise is not indicative of any damage being done, and you can ignore it indefinitely.
Many will never hear it because they don't routinely make prolonged tight turns at low speeds.
This noise is relatively common in all autos equipped with LSD and large tires. The LSD clutch packs are there to allow the inner tire to barely rotate, while the outer tire is rotating at a much greater relative rate. In tight turns at higher speeds, the relative difference in wheel rotation between inner and outer tires is minimal.
BMW is also aware of this as per SB.
This Service Information bulletin supersedes SI B33 01 02 dated March 2008.
SUBJECT
Grinding Noise from the Differential during Slow Cornering
MODEL
E90, E92 and E93 M3 from start of production
SITUATION
A grinding noise may be heard coming from the differential during slow cornering. This noise is best heard during tight cornering situations; for example, while parallel parking, driving in a tight circle, etc.
CAUSE
When the rear wheel speed differential varies during tight cornering, a slip stick effect is created on the lining and steel discs incorporated in the differential locking clutch, causing the grinding noise. This noise typically goes away as the locking clutch discs in the differential are broken in.
The break-in time varies depending on driving habits; for example, tighter cornering (working the locking clutch) means that it takes less time to break in the locking clutch discs.
CORRECTION
If a customer complaint is verified as described above on the E46 M3; E60 M5; E63 and E64 M6; or on the E90, E92 and E93 M3 vehicles, the differential oil should be replaced with a specially formulated differential oil, BMW part number 83 22 2 282 583.
PROCEDURE
1. Drain the differential oil. Refer to the appropriate model repair instruction in TIS:
Main Group 33 / Subgroup 10 / RA 0011259.
2. Refill the differential with special differential oil as shown in the illustration below.
Differential fill capacity = 1.2 liters (1.3 quarts).
3. Road test the vehicle.
With the vehicle at operating temperature, drive in tight circles (20 circles in each direction), allowing the special oil to coat the locking clutch discs.
The grinding noise will decrease when the locking clutch discs are sufficiently coated. Some slight noises may still be heard after driving in tight circles. Advise the customer that it will be necessary to drive the vehicle up to 600 miles before all noises are eliminated.
Note: Vehicles that have had the differential oil converted to this special oil should continue to use this oil whenever a service requiring the differential oil replacement is indicated.
clar;716404 said:
Very normal issues with the M3s'.
You guys can try doing the below after changing your differential oil as it worked for me.
For everyone who experiences this noise and has it quieted with a diff fluid additive, don't be surprised if the noise comes back. To some extent, it is the clutch packs in the LSD doing what they are designed to do. The noise is not indicative of any damage being done, and you can ignore it indefinitely.
Many will never hear it because they don't routinely make prolonged tight turns at low speeds.
This noise is relatively common in all autos equipped with LSD and large tires. The LSD clutch packs are there to allow the inner tire to barely rotate, while the outer tire is rotating at a much greater relative rate. In tight turns at higher speeds, the relative difference in wheel rotation between inner and outer tires is minimal.
BMW is also aware of this as per SB.
This Service Information bulletin supersedes SI B33 01 02 dated March 2008.
SUBJECT
Grinding Noise from the Differential during Slow Cornering
MODEL
E90, E92 and E93 M3 from start of production
SITUATION
A grinding noise may be heard coming from the differential during slow cornering. This noise is best heard during tight cornering situations; for example, while parallel parking, driving in a tight circle, etc.
CAUSE
When the rear wheel speed differential varies during tight cornering, a slip stick effect is created on the lining and steel discs incorporated in the differential locking clutch, causing the grinding noise. This noise typically goes away as the locking clutch discs in the differential are broken in.
The break-in time varies depending on driving habits; for example, tighter cornering (working the locking clutch) means that it takes less time to break in the locking clutch discs.
CORRECTION
If a customer complaint is verified as described above on the E46 M3; E60 M5; E63 and E64 M6; or on the E90, E92 and E93 M3 vehicles, the differential oil should be replaced with a specially formulated differential oil, BMW part number 83 22 2 282 583.
PROCEDURE
1. Drain the differential oil. Refer to the appropriate model repair instruction in TIS:
Main Group 33 / Subgroup 10 / RA 0011259.
2. Refill the differential with special differential oil as shown in the illustration below.
Differential fill capacity = 1.2 liters (1.3 quarts).
3. Road test the vehicle.
With the vehicle at operating temperature, drive in tight circles (20 circles in each direction), allowing the special oil to coat the locking clutch discs.
The grinding noise will decrease when the locking clutch discs are sufficiently coated. Some slight noises may still be heard after driving in tight circles. Advise the customer that it will be necessary to drive the vehicle up to 600 miles before all noises are eliminated.
Note: Vehicles that have had the differential oil converted to this special oil should continue to use this oil whenever a service requiring the differential oil replacement is indicated.
clar
Well-Known Member
Re: E9x M3 Technical Thread
I have done many tight turns in both directions after the oil change and it didn't help much. I realized that i just have to give it time to slowly sort itself out. It's not helping that my daily commute to work is less than 4km one way, so it's taking some time, but it's certainly improving.
I have done many tight turns in both directions after the oil change and it didn't help much. I realized that i just have to give it time to slowly sort itself out. It's not helping that my daily commute to work is less than 4km one way, so it's taking some time, but it's certainly improving.
