Car Parts Discount
Strut Cartridge Insert

Aftermarket & OEM Strut Cartridge Insert

Your car or truck's strut cartridges are the parts that are doing all the "dirty work" for your vehicle's suspension. When there is a problem with your ride, you will know it right away. The body or chassis may bounce a few more times when going over a bump, you may notice a rough response to those same bumps - almost like your vehicle is bottoming out, or you'll hear squeaking and whining while you drive. These all point to a problem with your struts, and can be fixed if you have the appropriate strut inserts installed. With age, all of your dampening devices will begin to leak. That is the nature of beast when it comes to hydraulics, but it is very easy to see. If you have a bad strut or shock, a simple visual inspection of the unit will tell you if oil is leaking out. This means danger is right around the corner, and if you do lose control of your car or truck while making a fast turn or dodging an obstacle then people could get hurt.

Hydraulic dampening has been used for over a century. The most common form of suspension on cars today is a MacPherson strut assembly suspension, because it provides a great amount of flexibility, 360-degrees of motion at the upper mount, and it eliminates the need for an upper control arm. The problem is that these strut assemblies are expensive to replace, and it would be much less costly to simply replace a leaking strut cartridge. Today, strut cartridges include a stem that travels down into a reservoir of hydraulic fluid. On monotube designs, that oil presses down on a floating piston that compresses a pocket of gas. That gas will "fight back" and rebound against the piston and push the stem back up. Twin tube designs have pockets of gas running along the sides of the strut body that the oil compresses without the use of a piston.

Inside your strut assembly lies the strut cartridge insert. Here is how it's replaced:

  • First, you have to lift the car and take the weight off the wheels.
  • Next, remove the wheels and calipers so that you can have easy access to the struts.
  • Unbolt the lower bolts that mount it to the spindle, and loosen the nuts that fasten the upper mount to the top of your fender or wheelhouse. This will be enough for you to get the strut assembly out.
  • Now use a spring compressor to relieve the pressure on the upper mount. Unbolt the strut rod center nut from the mount and remove it. Pull off the spring and bellows.
  • You should now have your strut ready for work. If the cartridge can pull or slide out of the body on its own, you are in luck. If not, then you will have to make cuts (using a pipe cutter or angle grinder) around the top so the insert comes out and a small hole made in the bottom so an anchor bolt can be installed.
  • Once you drop in the new strut cartridge insert, the rest of the process is the same but in reverse. If you had to cut the old cartridge out, then your replacements will likely come with a new rubber boot or grommet to fit around your cut at the top and anchor hardware for the bottom.

Don't get fooled by cheap junk that you find at bargain websites. At Car Parts Discount, we carry only the best quality strut cartridge inserts and other suspension components for your car or truck. Not only are our products top notch, but our prices are incredible and shipping is fast. Low cost, low downtime, high savings, and high satisfaction only at CPD.