Plastic deformation on butyl rubber would be caused by not only by continuous stress but also by spontaneous mechanical stress with vertical and lateral movement, on the other hand change of physical property by the over time must be focussed.
The rear engine mount on XH200W Opel B-Vectra was replaced by DIY, finding out the eye-opening changes in the suspending rubber material.
Comparison with new parts revealed the reduction of the Eg setting height even in removed condition, also the surrender of supporting capability by it's viscoelasticity.
The advantages by the Eg mount replacement this time were followings:
Trembling irritating noise from the meter cluster when starting was completely disappeared.
Relatively high frequency noises like bearing rotations or pump cavitation stopped in the cabin.
The shocks from the ground far were far reduced probably by the increase of compliance of new rubber material.
Steering reaction changed into dull by loosing direct connections between body and engine with transaxle of over 200kg mass.
These parts replacement this time were performed after 150,000km in 14 years using, remember here, this B-Vectra should be continued with the same distance and time being?
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