Suspension arm repair on a Subaru Impreza STI involves several steps and specific tools. click here for more details on the download manual…..
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Below is a detailed guide, broken down into bullet points, with descriptions of each tool required for the task.
### Tools Required
– **Jack and Jack Stands**
– A hydraulic jack is needed to lift the vehicle safely. Jack stands are crucial for providing stable support while you work underneath the car. Make sure the jack has a sufficient weight rating for the STI.
– **Lug Wrench**
– A lug wrench is essential for loosening and tightening the wheel lug nuts. Look for a cross-shaped or telescoping lug wrench for better leverage.
– **Socket Set (Metric)**
– A comprehensive metric socket set (including deep sockets) will be necessary for removing bolts from the suspension arm. Ensure the set includes 10mm to 19mm sockets, as these sizes are commonly used in Subaru vehicles.
– **Torque Wrench**
– A torque wrench is used to ensure that all bolts are tightened to the manufacturer’s specifications. this is crucial for safety and performance.
– **Pry Bar**
– A pry bar may be needed to help remove stubborn components or to create leverage when detaching the suspension arm from the chassis.
– **Rubber Mallet**
– A rubber mallet can be used to gently tap components into place without damaging them, especially useful for dislodging bolts or bushings.
– **Impact Wrench (Optional)**
– An impact wrench can speed up the process of removing and tightening bolts, especially if they are rusted or stuck.
– **Ball Joint Separator**
– this tool is designed to separate the ball joint from the control arm without damaging the components. It’s especially useful for stubborn joints.
– **Wrenches (Metric)**
– A set of open-end or box-end wrenches in metric sizes will help with various nuts and bolts that may not fit into a socket.
– **Replacement Suspension Arm**
– Ensure you have the correct replacement suspension arm that is compatible with your Subaru Impreza STI model year.
– **New Bushings (if necessary)**
– If the bushings in the suspension arm are worn out, it’s advisable to replace them as well. Make sure to get OEM or high-quality aftermarket bushings.
– **Grease or Lubricant**
– Use a suitable grease for lubricating the bushings and joints during installation, which ensures smoother operation and longevity.
### Repair Procedure
– **Preparation**
– Park your Subaru on a flat surface and engage the parking brake. Gather all your tools and ensure you have enough space to work comfortably.
– **Raise the Vehicle**
– Use the hydraulic jack to lift the front or rear of the vehicle (depending on which suspension arm you are repairing) and securely place jack stands underneath the vehicle for safety.
– **Remove the Wheel**
– Use the lug wrench to loosen and remove the lug nuts, then take off the wheel to gain access to the suspension components.
– **Identify the Suspension Arm**
– Locate the suspension arm that needs to be repaired. inspect it for any visible damage or wear, including bushings and ball joints.
– **Remove the Old Suspension Arm**
– Use the appropriate socket to remove the bolts securing the suspension arm to the chassis
and the steering knuckle. If the bolts are rusted, an impact wrench may help.
– If applicable, use the ball joint separator to detach the ball joint from the suspension arm.
– **Inspect and Replace Bushings**
– If your suspension arm has bushings that are worn out, remove them from the old arm using a press or bushing removal tool. Install new bushings in the new suspension arm, applying grease to aid installation if needed.
– **Install the New Suspension Arm**
– Position the new suspension arm and insert the bolts into their respective locations. Use the torque wrench to tighten the bolts to the manufacturer’s specifications.
– **Reattach the Ball Joint**
– If you separated the ball joint, reattach it to the new suspension arm. Ensure it is secure and properly aligned.
– **Reinstall the Wheel**
– Place the wheel back onto the hub and hand-tighten the lug nuts. Lower the vehicle back to the ground using the jack, and then fully tighten the lug nuts with the lug wrench in a criss-cross pattern.
– **Final Checks**
– After completing the installation, double-check all bolts and connections. Take the car for a short test drive to ensure the suspension is functioning properly.
– **Alignment (if necessary)**
– After replacing suspension components, it’s advisable to have a wheel alignment performed to ensure proper handling and tire wear.
This guide provides a comprehensive overview of the tools and steps required for suspension arm repair on a Subaru Impreza STI, ensuring a successful and safe repair process.
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