DIY Wheel Alignment Adjustments

While a professional four-wheel alignment is the gold standard for ensuring your vehicle handles as it should, there are instances where you might want to make some minor adjustments yourself. This guide focuses on how to adjust the camber and toe on a Toyota Celica using the factory alignment bolts. It's crucial to understand that these are DIY adjustments, and for optimal results and safety, a professional alignment should be performed afterwards. You simply cannot achieve the pinpoint accuracy required for a perfect alignment at home.

What You'll Need

Before you begin, gather the necessary tools. Having the right equipment will make the process smoother and safer:

• A basic set of sockets
• At least one socket wrench
• A hydraulic jack
• Jack stands (essential for safety – never work under a car supported only by a jack)
• A torque wrench (highly recommended to ensure bolts are tightened to the correct specification)

Safety First: Lifting Your Celica

Safety is paramount when working on any vehicle. Always follow the correct procedure for lifting your car:

1. Locate the designated rear jack point on your Celica.
2. Carefully jack up the rear of the car.
3. Securely place jack stands under the appropriate support points. Ensure the car is stable on the jack stands before proceeding. Never rely solely on the jack to support the vehicle while you are working underneath it.

Understanding the Alignment Bolts

Your Celica's suspension arms have specific bolts designed for alignment adjustments. We'll be focusing on these:

• Toe Adjustment Bolt: Typically located towards the rear of the suspension arm.
• Camber Adjustment Bolt: Usually found towards the front of the suspension arm. This bolt often passes through a D-shaped plate, which is key to the adjustment mechanism.

Referencing the diagram (imagine a visual here showing the bolts circled in yellow for toe and red for camber), you can identify these components on your vehicle's rear suspension.

Adjusting Camber

Camber refers to the angle of the top of the wheel relative to the vertical. Too much negative camber (where the top of the wheel tilts inwards, resembling a "/ \" shape) is common after lowering a car and can lead to uneven tyre wear.

Here's how to adjust it:

1. Locate the camber adjustment bolt. You'll notice a gold, D-shaped plate on the bolt.
2. Loosen, but do not remove, the lock nut situated in front of this D-shaped plate.
3. Find the other end of the camber bolt. This will be on the opposite side of the upper suspension arm, often near the rear crossmember. You'll need to be under the car to access it.
4. Once located, you can freely turn this bolt to adjust the camber angle.

Adding Positive Camber (Reducing Negative Camber)

If your wheels are tilted inwards (excessive negative camber), you'll want to add positive camber. To do this, turn the camber bolt towards the middle of the car. This action will rotate the D-shaped plate, altering the camber angle.

Visual Aid: Imagine the D-shaped plate. Before adjustment, the flat side might be facing outwards. After adjusting for positive camber, the flat side should be facing the middle of the car, as depicted in the red drawing (again, imagine a visual here). This re-positions the suspension arm.

Adding Negative Camber (Increasing Negative Camber)

Conversely, if you wish to increase the inward tilt of the wheel (add negative camber), turn the bolt towards the outside of the car. This will move the flat side of the D-shaped plate away from the car's centreline.

Adjusting Toe

Toe refers to the angle of the wheels relative to each other when viewed from above. If the front of the wheels are closer together than the back, it's 'toe-out'; if the back is closer, it's 'toe-in'. Adjusting toe is generally simpler than camber.

Here's how to adjust it:

1. Locate the toe adjustment bolt. This bolt controls the length of the suspension arm, thereby adjusting the toe angle.
2. Turn the toe bolt back and forth. As you turn it, you'll observe the wheel moving side-to-side.
3. Adjust until the wheel appears to be sitting correctly. This is where visual estimation is used, highlighting the need for a professional check afterwards.

Final Tightening and Checks

Once you've made your adjustments, it's time to secure everything and perform initial checks:

1. Using your torque wrench, re-torque the lock nuts on both the camber and toe adjustment bolts to the manufacturer's specification, which is typically around 55 ft/lbs for these components. Ensure you tighten them to the correct torque to prevent them from loosening.
2. Carefully lower the car back to the ground.
3. Visually inspect the alignment. While you can't measure it precisely without equipment, look for obvious discrepancies.
4. Take the car for a short drive (around the block is sufficient). Listen for any unusual noises and feel how the car handles.
5. After the short drive, re-check the alignment settings. Ensure that nothing has shifted and that the wheels are still positioned where you intended. This step is crucial to confirm that your adjustments have held.

When to Seek Professional Help

As mentioned repeatedly, these are basic adjustments. For optimal tyre life, fuel efficiency, and driving dynamics, a professional alignment using specialized equipment is essential. Consider these DIY steps as a way to temporarily correct issues or get your car drivable until you can book a professional appointment.

Common Misconceptions and Tips

• Precision: Home adjustments are estimations. Professional alignment machines are incredibly accurate.
• Tyre Wear: Incorrect alignment, even after DIY adjustments, can still cause premature tyre wear.
• Driving Feel: Proper alignment significantly impacts steering feel and stability.

Frequently Asked Questions

Q1: Can I do a full alignment at home?

A1: No, you can only make basic adjustments to camber and toe. A full alignment requires specialized equipment to measure and adjust all angles precisely.

Q2: How often should I get my alignment checked?

A2: It's recommended to have your alignment checked annually, or whenever you notice uneven tyre wear, the car pulling to one side, or after hitting a significant pothole.

Q3: What happens if I don't tighten the lock nuts properly?

A3: If the lock nuts are not tightened to the correct torque, they can loosen over time, causing your alignment settings to change unexpectedly, potentially leading to poor handling and increased tyre wear.

Q4: How do I know if my car needs an alignment?

A4: Signs include the car pulling to one side, the steering wheel being off-centre when driving straight, uneven or rapid tyre wear, and squealing tyres during turns.

Q5: Is it safe to drive with incorrect alignment?

A5: Driving with incorrect alignment is not ideal. It can lead to compromised handling, increased fuel consumption, and significantly reduced tyre life. In severe cases, it can even affect the safety of the vehicle.