I am swapping struts and I cant remove the cap, it looks like I need a special tool or something.

what do you think?

You can use a pipe wrench to take them off. Putting them back on is another story. It is a little difficult to set the proper torque using a pipe wrench.

You can use a pipe wrench, but that would be a last resort. I seem to remember seeing a tool that has two small round prongs thats used for taking the strut nut off. The tool is similar to an angle grinder wrench...right now I can't seem to find the web site for it.

If you really want to get creative, you can fashion a tool that has a c shape head and put two bolts spaced the same as those holes on the nut.

From working in a bike shop we used to have pin spanners to remove suspension forks & shocks.

A quick search on craftsman.com showed up these Armstrong Face Spanner Wrench

ive never seen a nut like that.....

all of mine were smaller OD than that....

i slumped to a pipe wrench.....

They shocks were old koni's

My solution was to grind a notch, I then tapped it loose with a screw driver.

I had another retaining nut with the new struts so I didnt have to keep the old ones.

I bought an over-sized channel lock for the strut on my '86 Audi some years ago. The Audi's gone but the channel lock worked wonders for the strut on the 914. For replacement, I used the "Spoke" torque setting; that is, I tightened the bastard down good and hard.

Spoke

pipe wrench or one of those fancy-schmancy craftsman jobbers... made to turn rounded pipes without scarring...