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FTY
11-13-2013, 12:27 AM
Anatomy of a FIAT 500 Strut mount

Finally got around to ripping apart and documenting the factory strut mount. These are fairly prone to failure, especially when removed and re-installed. I have had two sets fail so far and have since replaced them with every suspension change with no further failures. These mounts carry the weight of the car on a set of rolling bearings like most cars in production today. VW, Volvo are a couple of other companies that have fairly weak stock strut mount bearings. These failures result in clunking/plopping noises from the front end of the car. They are very audible and can felt also through the steering wheel.

http://www.eurocompulsion.net/AnatomyFIAT500strutmount.jpg

http://www.eurocompulsion.net/AnatomyFIAT500strutmount1.jpg

http://www.eurocompulsion.net/AnatomyFIAT500strutmount2.jpg

http://www.eurocompulsion.net/AnatomyFIAT500strutmount3.jpg

My theory, based on personal experience with my car and customer cars is that the bearing carrier once seated slightly warps to conform with the body mount. Once that is rotated or unseated that warp becomes warped again creating a gap in which under normal driving and uneven pavement you get the dreaded knocking. Anyone else have any ideas? The carriers are fairly thin and the entire assembly is pretty cheap in construction.

ScorpionSkins.com
11-13-2013, 12:39 AM
I just recently had one of these replaced on my passenger side and would be more than appreciative of an aftermarket drop-in solution. They seem to be one of those nuisances that will persist to exist throughout the lifetime of the vehicle.

Thanks for starting this topic. I'm interesting in reading the opinions and input of those more technically inclined as well as the vendors such as yourself out there potentially working on this issue.

Abarth Five O
11-13-2013, 01:30 AM
Chris, your analysis is right on the money in pinpointing the source of the problem. I can say from 1st hand experience that after going through 2 sets of COs and a costly and painful process, the compounding factor is a poorly designed front CO in which the spring sits directly on the oem top strut mount resulting in too much play/looseness as opposed to BC or Bilstein designs which has a narrower spring fitted with a collar that fits snugly onto the oem top strut mount with the right amount of spring tension.

MAZ
11-13-2013, 10:19 AM
Excellent information.

I did not use a fresh set of mounts when I did my coilovers. The mounts didn't seem to have the clunking noises until 5k miles down the road. Definitely replace the mounts with every removal as stated.

RobGilbert
07-21-2018, 07:17 PM
Have you guys at Eurocompulsion come up with a superior option to the OEM strut mounts? Mine are in need of replacing and I’d rather not feed into a replacement cycle if I don’t need to.