thegunguy
February 11th 2006, 15:37
For future reference it might make sense to collect documented cases of similar shock tower deformations in other BMW models. Like some of you have noted, the issue does not appear to be limited to our model.
On page 117 of the January Roundel, the editors respond to a reader's letter describing similar deformation in an E46. They quote two anonymous BMW master technicians who state that the issue is “not common or uncommon” with later model BMWs. The do a good job of describing how the damage can occur and is repaired (in non all aluminum framed cars that is). They propose several theories behind the deformation, but the most plausible seems to be that cost cutting measures have mandated using thinner stampings which are inherently weaker. They support this claim by noting that earlier models, such as the E30, that use similar suspension designs but have thicker stampings show no evidence of deformation.
Preventative use of strut tower braces is examined for both pros and cons, but it seems like it’s a good idea. Too bad we don’t have an option here, even from the aftermarket suppliers. If you buy in to the weaker materials theory, the solution suggested by Andrew and Bob of placing “helmets” above and below the existing shock tower mount may, in fact, do the trick. I guess the possibility of such a fix could be reasonably developed on our own should we be left in the lurch.
If someone has access to a scanner and the article, it would be worthwhile to post here.
We should all scan similar periodicals for other documented cases, and it would also be wise to see if we can get any statements from other technicians that have history of servicing BMWs, not just the Z8. Should things turn nasty with Munich, we may find that we have a louder voice by uniting with our non E52 brethren.
On page 117 of the January Roundel, the editors respond to a reader's letter describing similar deformation in an E46. They quote two anonymous BMW master technicians who state that the issue is “not common or uncommon” with later model BMWs. The do a good job of describing how the damage can occur and is repaired (in non all aluminum framed cars that is). They propose several theories behind the deformation, but the most plausible seems to be that cost cutting measures have mandated using thinner stampings which are inherently weaker. They support this claim by noting that earlier models, such as the E30, that use similar suspension designs but have thicker stampings show no evidence of deformation.
Preventative use of strut tower braces is examined for both pros and cons, but it seems like it’s a good idea. Too bad we don’t have an option here, even from the aftermarket suppliers. If you buy in to the weaker materials theory, the solution suggested by Andrew and Bob of placing “helmets” above and below the existing shock tower mount may, in fact, do the trick. I guess the possibility of such a fix could be reasonably developed on our own should we be left in the lurch.
If someone has access to a scanner and the article, it would be worthwhile to post here.
We should all scan similar periodicals for other documented cases, and it would also be wise to see if we can get any statements from other technicians that have history of servicing BMWs, not just the Z8. Should things turn nasty with Munich, we may find that we have a louder voice by uniting with our non E52 brethren.