A couple of observations: 1 That isnt a genuine BMW rotor but an aftermarket, origional are two piece, aluminium hub riveted to iron rotor. 2 for any runout checks the disk should be secured by at least two diametrically opposed wheel bolts, the little 6mm disc screw is only for disk location purposes and does not fully secure the disc hub/bell to the wheel (bearing) hub. It is only the wheel bolts that fully secure the disc to the bearing flange, that will provide actual runn out/raotational thickness as per first dti tests. ;-)
Hello and thank you for watching the video, also for taking the time to comment. The securing screws are absolutely suitable on this check and I have carried out identical results with bolts in and wheel bolts out on this vehicle. No difference, exact same result. You are correct about setup Simon, that is by the book the best and most accurate way. There is technical information stating more than x2 wheels nuts to be used doing this test as well preferably 3 from memory on this test. Interesting observation with the aftermarket rotor, Do all models of these vehicles have 2 piece from factory? Any stamps/numbers that can be viewed to confirm? Thanks
@@GerardBurkeBurkesGaragealmost every 2010+ BMWs has 2 piece disc brakes. Those on the video are actually 2 pieces type but definitely aftermarket. BMW OEM "drum"/middle of the disc is shinny. On the market there are also one piece discs which are cheaper but I dont know if they are any good.
Very good video, it should have more views and likes ! I installed new front discs on my E92 but I still have sometime vibrations (Not as bad as in your video ). Could it be coming from the hubs themselves ? I have a similar gauge like your, what is the allowed tolerance on the hub flange ? Edit : Ha ! ok ! You cover it later in the video. Thank you
Years ago I read that when rust forms, there is an expansion of 13 times. Clearly this can cause eccentricity/false seating very easily, as well as causing parts to freeze together. Cleanliness is next to godliness. Before applying heavy force…..stop and think….why ? Enjoyed the video. Amateur mechanic.
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Great information, thanks for going through everything, step by step
Great job Gerard, very detailed, Thank You👌👍🙏😎☘☘
Thanks Pat, much appreciated
A couple of observations:
1 That isnt a genuine BMW rotor but an aftermarket, origional are two piece, aluminium hub riveted to iron rotor.
2 for any runout checks the disk should be secured by at least two diametrically opposed wheel bolts, the little 6mm disc screw is only for disk location purposes and does not fully secure the disc hub/bell to the wheel (bearing) hub. It is only the wheel bolts that fully secure the disc to the bearing flange, that will provide actual runn out/raotational thickness as per first dti tests.
;-)
Hello and thank you for watching the video, also for taking the time to comment.
The securing screws are absolutely suitable on this check and I have carried out identical results with bolts in and wheel bolts out on this vehicle. No difference, exact same result.
You are correct about setup Simon, that is by the book the best and most accurate way. There is technical information stating more than x2 wheels nuts to be used doing this test as well preferably 3 from memory on this test.
Interesting observation with the aftermarket rotor, Do all models of these vehicles have 2 piece from factory?
Any stamps/numbers that can be viewed to confirm?
Thanks
@@GerardBurkeBurkesGaragealmost every 2010+ BMWs has 2 piece disc brakes. Those on the video are actually 2 pieces type but definitely aftermarket. BMW OEM "drum"/middle of the disc is shinny. On the market there are also one piece discs which are cheaper but I dont know if they are any good.
Very good video, it should have more views and likes !
I installed new front discs on my E92 but I still have sometime vibrations (Not as bad as in your video ).
Could it be coming from the hubs themselves ?
I have a similar gauge like your, what is the allowed tolerance on the hub flange ?
Edit : Ha ! ok ! You cover it later in the video.
Thank you
🙏🙏❤️❤️
Years ago I read that when rust forms, there is an expansion of 13 times. Clearly this can cause eccentricity/false seating very easily, as well as causing parts to freeze together. Cleanliness is next to godliness. Before applying heavy force…..stop and think….why ?
Enjoyed the video. Amateur mechanic.
Thank you
Also the next layer, alloy wheels bent,warped from hitting kerb,I noticed this once but not before replacing rotors first. Yeah I know my bad.