Why do top mounts not come with the locking nut ?

[VenomX]

Having a suspension revamp on the C240 at the front. Got all the parts and will be getting the strut assembled by experienced mechanics then fitting myself.
One question is, why do the mounts not come with a nut to lock the top mount in place?
I will have to get two of these separately in order for the mechanics to fit the top mount... I have inspected all the parts I have bought and surprised the febi mounts don't have these locking nuts
The mounts themselves have no threads and use a separate slotted nut as pictured below


Said slotted nut then requires a " special tool " like this... to tighten




I see some old VWs have a similar system

 

[DSM10000]

Possibly because the securing ring is considered to be reusable?

 

[VenomX]

Possibly because the securing ring is considered to be reusable?

Yeah I know that, but in my circumstance I am replacing the whole strut, therefore I had to buy the slotted nuts separate

 

[DSM10000]

Yeah I know that, but in my circumstance I am replacing the whole strut, therefore I had to buy the slotted nuts separate

Why couldn't you reuse the existing nuts?

 

[DSM10000]

Duplicate post.

 

[VenomX]

Why couldn't you reuse the existing nuts?

Mechanic is assembling the struts with all new parts. I’ll then be swapping the old unit for the the new unit straight into the car. Saves money and for safety as I don’t want to compress springs myself at home

 

[DSM10000]

Mechanic is assembling the struts with all new parts. I’ll then be swapping the old unit for the the new unit straight into the car. Saves money and for safety as I don’t want to compress springs myself at home

I have only compressed springs once.

I didn't enjoy it

 

[ALFAitalia]

Just need the right tools.....I replaced both rear springs on the A Class last month.....no worries.

 

[VenomX]

Got a pair of the slotted nuts for £5 at Mercedes dealer, happy with that.

 

[markjay]

I have only compressed springs once.

I didn't enjoy it

I did that too, but I had spring compressors to hand, so not a bad job. Also, got a tip at the time from a race driver, fill the gap between the damper and the external tube with engine coolant, it will allow the damper to remain cooler by heat dissipation, I.e. transferring heat to the external tube using convection. I don't race this days.... so this isn't something that I've repeated since.