Z3M boot floor
Hi Soma
No mate, i did ask about the integrity of it and it didn't concern him. I think that the problem lies with the spot welds so that has been sorted/eradicated so i think the rest should take care of itself to be honest.
I will be keeping an eye on the repair but to be honest Lez knows his stuff and i trust him 110% on the repair he has made, how it should have been done properly in the first place.
Now i just wish summer was here to put it through its paces now i have confidence back in the car. Nothing worse than tottering about because you are worried about making it worse.
Kind Regards
Matt.
No mate, i did ask about the integrity of it and it didn't concern him. I think that the problem lies with the spot welds so that has been sorted/eradicated so i think the rest should take care of itself to be honest.
I will be keeping an eye on the repair but to be honest Lez knows his stuff and i trust him 110% on the repair he has made, how it should have been done properly in the first place.
Now i just wish summer was here to put it through its paces now i have confidence back in the car. Nothing worse than tottering about because you are worried about making it worse.
Kind Regards
Matt.
HI Matt,
Not to worry you mate but it is my understanding that simply repairing the spot welds only masks the visual damage. It is the Ms inferior diff bracket design that needs reinforcement to prevent the welds from popping in the first place. Perhaps someone can correct me here?
Not to worry you mate but it is my understanding that simply repairing the spot welds only masks the visual damage. It is the Ms inferior diff bracket design that needs reinforcement to prevent the welds from popping in the first place. Perhaps someone can correct me here?
1999 Cosmos Black MCoupe - 1 of only 27 original Australian imports
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Yup you should really get the uprated diff bracket installed from BMW as well or go down a randy forbes routesoma wrote:HI Matt,
Not to worry you mate but it is my understanding that simply repairing the spot welds only masks the visual damage. It is the Ms inferior diff bracket design that needs reinforcement to prevent the welds from popping in the first place. Perhaps someone can correct me here?
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It wasn't recalled so it was probably done free of charge as good will like mine and many others on the forum, BMW are pretty much out of generosity regarding this issue now as the cars are 10+ years old
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Can you get him to scan this in and upload? if thats right it would be good ammo if you are looking for BMW to fix the car FOC
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"Not to worry you mate but it is my understanding that simply repairing the spot welds only masks the visual damage"
The differential bracket was fine no problem with that. Maybe if i was goint to spank it around a track then i would have bought a coupe not a roady, to be honest i think the diff bracket will be fine.
Please explain masks the visual damage
Regards Matt.
The differential bracket was fine no problem with that. Maybe if i was goint to spank it around a track then i would have bought a coupe not a roady, to be honest i think the diff bracket will be fine.
Please explain masks the visual damage
Regards Matt.
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- Joined: Wed 12 Mar, 2008 14:33
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- Location: UK
From what i understand the spot welds are a side effect of the actual problem. Once the weak diff bracket starts to crack it pulls away at the boot floor leading to spot weld failure. So simply fixing the spotwelds is masking the main issue (being the diff bracket failure).
I dont think we are talking about spanking it around a track either, if its already started to go it will get weaker and weaker. Even some of the 1.9's have had diff bracket failure so having the level of torque from an M in comparison makes you realise it wont take an awful lot. (just my 2p) If i was you i'd consider ordering the uprated diff bracket supplied on the later Z's and get it fitted
I dont think we are talking about spanking it around a track either, if its already started to go it will get weaker and weaker. Even some of the 1.9's have had diff bracket failure so having the level of torque from an M in comparison makes you realise it wont take an awful lot. (just my 2p) If i was you i'd consider ordering the uprated diff bracket supplied on the later Z's and get it fitted
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Diff bracket thread here for anyone that may need to see it
http://www.zroadster.net/forum/viewtopic.php?t=20157
http://www.zroadster.net/forum/viewtopic.php?t=20157
'High G' motoring enthusiast
Yes Corky...no problems thanks to this bit installed by the previous owner:corky wrote:soma.
Have you checked your welds in the boot
http://www.z3mcoupe.com/forum/showthread.php?t=10169
1999 Cosmos Black MCoupe - 1 of only 27 original Australian imports
The diff bracket isn't the main fail point although it does happen, the main weakness is the spot welds of the crossmember to the bootfloor/chassis rails. The lack of spot welds around this area and directly above the bracket lead to generaly metal fatigue and eventual failure of the few spot welds that are there.
So are you saying the repair that freelandm has had done is suffice, providing there is no damage to the diff bracket?c_w wrote:The diff bracket isn't the main fail point although it does happen, the main weakness is the spot welds of the crossmember to the bootfloor/chassis rails. The lack of spot welds around this area and directly above the bracket lead to generaly metal fatigue and eventual failure of the few spot welds that are there.
It certainly looks good and will probably be ok IMO as they are no longer spot welds in the BMW style! The bit that I would have done extra is added welds to the raised square section as seen in this picture;Desiro wrote:So are you saying the repair that freelandm has had done is suffice, providing there is no damage to the diff bracket?c_w wrote:The diff bracket isn't the main fail point although it does happen, the main weakness is the spot welds of the crossmember to the bootfloor/chassis rails. The lack of spot welds around this area and directly above the bracket lead to generaly metal fatigue and eventual failure of the few spot welds that are there.
It does need flatting down a bit so that it can be welded to the cross memeber below. Directly below this is the diff mount, why it's not welded consistently across the boot floor I'm not sure but I reckon this contributes to some flex and the eventual failure of the spot welds.