This is the proper way to tighten struts but without any special tools. The fancy socket there is a 13/16″ Sparkplug socket with the rubber insert removed. Turn the socket with the flats on the outsised using a wrench, in this case 7/8″ Now the tricky parts is using the 1/4″ drive 6 point socket to hold the strut top. A breaker bar would be better here but a ratchet will do just fine also. All these tools were in my basic Craftsman tool kit I have at home. This eliminates the risk of either damaging the strut mount by tearing it with turing torque or over-tightening the strut top. Also make sure to use the Koni supplied nut to hold the damper in the upright on the NG900/9-3. Using the original nut will ruin the damper. The new one tightens with a pin spanner and is commonly left loose causing noise. Hope this helps you.
Ready for action
“Too Tight.. Not warranty” This customers mechanic kept tightening the top nut to fix a clunk he caused by leaving the large lower nut loose that holds the damper in!
Thanks, Nick Taliaferro