tarquin1867
Member
I have got the now infamous 40 wobble . Reading the various threads I knew what it was but have been through the cheaper options of switching wheels etc and i must say putting the unworn rear ones on the front has made a difference but the wobble is still apparent just not as pronounced. My local independent garage then had a look-see and immediately found that the drivers side inner cv gaiter had worn loose- not split- and all the grease had been deposited onto the inside of the engine undershield. There is significant up/down movement when compared to the left side one and of course being "bone dry" the bearing is worn. I was interested to read in an earlier thread about "6yr Design life" as mine is an 06 prestigio with 36000 only on the clock it seems to me that mileage is not a factor in parts wearing!!
I also have had the drivers side front spring break recently and as a retired metallurgical technician I looked at the broken face of the spring and saw that it had a brittle fracture . It seems to me that the way the spring is made will lead to this , when the rod is heated and coiled in the machine one end has to be held while the other is rotated to form the coil. This size of bar will lose heat rapidly at the ends due to being clamped and this leads to localised hardening due to quick cooling if this is not "tempered" out by subsequent heating and controlled cooling it will remain under the extra stress of the localised hardening.
Mine broke on the bottom coil where it fits on the tray. Has anybody else found it has broken in the same place?
I also have had the drivers side front spring break recently and as a retired metallurgical technician I looked at the broken face of the spring and saw that it had a brittle fracture . It seems to me that the way the spring is made will lead to this , when the rod is heated and coiled in the machine one end has to be held while the other is rotated to form the coil. This size of bar will lose heat rapidly at the ends due to being clamped and this leads to localised hardening due to quick cooling if this is not "tempered" out by subsequent heating and controlled cooling it will remain under the extra stress of the localised hardening.
Mine broke on the bottom coil where it fits on the tray. Has anybody else found it has broken in the same place?