Torn boots of front lower control arms (a month old)

[stan_man]

Hello,
I have an issue with my control arms - Audi 4F 2010, 3.0 tdi. I've recently replaced the OEM control arms (all of them) with new ones and in some time the front lower arms' boots got torn.
I thought it could be a low quality aftermarket parts (I must confess I got something cheaper), so I replaced them again with Moog. This is considered to be good quality parts with no issues and I got friends with same model.

It took them a month and now both are torn again. More on the left side.

I've got the bushes of the sub-frame replaced prior of the control arms replacement. Could it be something else that causes the tearing? Engine mounts (no faults though), steering rack, stabilizing bar bushes, or shock-absorbers' bushes on top?

I know it could be the part itself, but just for a month and two different suppliers seems like very low possibility.

Any ideas?

[jubbly]

Sounds like whoever fitted these fitted them with the car in the air, which then puts the rubber section under strain.
My understanding is you have to lower the car back into a flat surface then tighten the bolts as not to shear the rubber, which is what your issue sounds like to me.
Though I could be completely wrong

[stan_man]

That's when you tighten the bush. I have these on the picture torn:
https://cdn4.pelicanparts.com/techar..._med/pic06.jpg

[jubbly]

Oh, never seen that happen after a month before, especially to be on your second set with the same issue.

You might need an expert like crasher to advise.

[Crasher]

Sounds like whoever fitted these fitted them with the car in the air, which then puts the rubber section under strain.

You beat me to it on that but it does not apply to the outer ball joint boots, only the inner bushes and I think he means the ball joint boots. These only split when the don't slip around the joints pin when operating the steering.

[stan_man]

...These only split when the don't slip around the joints pin when operating the steering.

That makes sense. Does it mean that the part itself is not good, or it's not fitted correctly? I did not see any specifics in ELSA about the installation.

It's not possible I to overseer somehow and cause this damage, is it?

[Crasher]

I check the pin rotates inside the boot before fitting and encourage a little grease under the boot if turning the pin twists the boot plus I also scrape and wire brush polish and lube the surface the end of the boot sits on when the pin is pulled into the hub.