Early Bronco Door Pillar Posts

Early Bronco Door Pillar Replacement - A Complete Guide

Rust around the Early Bronco door pillars is one of the most common structural problems found on a 1966-77 Ford Bronco. These pillars support the door hinges, maintain door alignment, and tie the body structure together between the windshield frame, rocker panels, and quarter panels. When they rust out, doors begin to sag, body gaps change, and the Bronco can lose important structural rigidity.

If you're restoring a classic Bronco, replacing the door pillars is often a necessary repair. With careful planning and the right approach, it’s a job many builders can tackle in their own shop. The key is maintaining alignment while replacing the metal so the doors continue to fit properly.

Below are proven tips and best practices for Early Bronco door post replacement to help you get the job done right.

What Do Early Bronco Door Posts Do?

The 1966-77 Ford Bronco door pillars play a major role in the structure of the body tub. These vertical supports hold the door hinges and help maintain the correct door opening shape.

Door pillars are responsible for:

• Supporting the door hinges

• Maintaining proper door alignment and body gaps

• Connecting the rocker panels to the windshield frame

• Supporting the door striker and latch alignment

• Adding rigidity to the Bronco body structure

When rust weakens the pillars, the doors may begin to drop or bind. This can cause uneven gaps, difficulty closing the door, and even stress cracks in nearby sheet metal.

Inspect Surrounding Areas Before Replacing Door Pillars

Before replacing an Early Bronco door post, it’s important to inspect the surrounding sheet metal. Rust in the door pillar area is often part of a larger structural issue.

Common areas to inspect include:

• Inner rocker panels

• Outer rocker panels

• Kick panels

• Front floor pans

• Door hinge mounting plates

• Cowl supports

If these components are rusted or weak, they should be repaired before installing the new pillar. Installing a new door pillar on compromised metal can lead to poor alignment and future problems.

Many Bronco restorations involve replacing rocker panels and kick panels at the same time as the door pillars.

Brace the Door Opening Before Cutting Out the Old Pillar

One of the most important steps in Early Bronco door post replacement is bracing the body before removing the original pillar.

Once the old pillar is cut out, the body can flex or shift, which will change the door opening dimensions. Even a small amount of movement can make door alignment difficult.

Common bracing methods include:

• Welding a temporary brace across the door opening

• Running square tubing between the hinge and striker areas

• Adding a brace between the two door openings

The goal is to keep the body tub from moving while the structural pillar is removed.

Taking time to properly brace the body will save hours of frustration later.

Test Fit the New Door Pillar Before Welding

When installing a replacement Early Bronco door pillar, avoid fully welding it immediately.

Instead:

1. Position the new pillar and clamp it in place.

2. Install the door hinges onto the pillar.

3. Hang the door.

4. Check door gaps and alignment.

Make adjustments until everything lines up properly.

Door alignment should be checked at:

• The rocker panel

• The windshield frame

• The quarter panel edge

• The door striker area

Once the door fits correctly, the pillar can be tack welded and rechecked before final welding.

Use the Door to Set Alignment

The door itself is the most accurate tool you have when aligning a new 1966-77 Ford Bronco door pillar.

Because the hinges mount directly to the pillar, the door will quickly reveal whether the pillar is positioned correctly.

When aligning the pillar:

• Bolt the hinges to the pillar

• Install the door

• Adjust the pillar until consistent door gaps are achieved

Pay close attention to the gap along the rocker and the fit against the windshield frame. Small adjustments can make a big difference in the final result.

Replace Worn Door Hinges

If your Early Bronco door hinges are worn, it can make alignment much more difficult.

Over time, hinge pins and bushings wear out, causing the door to sag even if the pillar is properly installed.

During pillar replacement it’s a good idea to:

• Replace hinge pins and bushings

• Inspect hinge plates

• Check hinge mounting threads

Fresh hinges help ensure the door closes smoothly and maintains proper alignment.

Protect the Inside of the New Door Pillar

Door pillars rust from the inside out due to trapped moisture and debris.

Before final installation of your replacement Early Bronco door post, take steps to prevent future rust.

Recommended protection steps include:

• Applying weld-through primer to mating surfaces

• Spraying internal frame coating inside the pillar

• Sealing seams with automotive seam sealer

These steps help keep moisture out and extend the life of the repair.

Measure Everything Before Disassembly

Before cutting out the old door pillar, take detailed measurements.

Important measurements include:

• Door opening height

• Door opening width

• Distance between hinge and striker mounting points

• Existing door gap measurements

Photographs are also helpful references.

These measurements give you a baseline when positioning the new pillar and help ensure the door opening returns to its original dimensions.

Final Thoughts on Early Bronco Door Pillar Replacement

Replacing rusted Early Bronco door pillars restores structural integrity and proper door alignment to a 1966-77 Ford Bronco. While the job requires careful preparation and patience, the results are worth the effort.

Bracing the body, checking surrounding sheet metal, and using the door itself to guide alignment are the keys to a successful installation. Taking the time to test fit and measure before welding will help ensure the doors close smoothly and the body lines stay correct.

For anyone restoring a classic Bronco, repairing rusted door pillars is an important step toward bringing the body back to factory strength and fitment.