1987-1993 Ford Mustang Hood: Solving Alignment, Flutter, and Rust Issues

Symptoms of a Damaged or Failing Hood

Since a hood is a body panel, "failure" typically refers to physical damage or misalignment rather than a mechanical breakdown. Here are the most common symptoms to watch for:

• Visible Damage: Dents, dings, creases, or large-scale bending from impacts are the most obvious signs of a bad hood.
• Rust and Corrosion: OEM hoods are made of steel and can rust, especially along the front edge, inner seams, and around any chips in the paint. Bubbling paint is an early sign of underlying corrosion.
• Poor Alignment and Uneven Gaps: If the gaps between the hood and fenders are uneven, or if the hood sits higher or lower than the surrounding panels, it indicates an alignment issue or possible damage to the hood, hinges, or vehicle frame.
• Hood Flutter or Shaking at High Speeds: A very common issue with Mustangs is hood movement at highway speeds. This can be caused by air pressure getting under the hood, but it is often a sign that the hood latch or rubber bump stops need adjustment.
• Difficulty Latching or Opening: If the hood is hard to close, doesn't latch securely, or is difficult to open, it could point to a problem with the latch mechanism or poor hood alignment. A hood that is not securely latched is a major safety hazard.

Buying a Used 1987-1993 Mustang Hood: What to Check

A used OEM hood is often the best choice for fit and originality. However, you must inspect it carefully before buying. Take a small magnet with you to help check for hidden repairs.

Inspection Checklist:

1. Check for Rust: Flip the hood over and meticulously inspect the underside seams and edges. This is where moisture collects and rust begins. Pay close attention to the front lip and the inner bracing. Surface rust can be treated, but avoid hoods with deep, flaking rust that compromises the metal's integrity.
2. Look for Hidden Body Filler: Run your hand over the entire top surface to feel for any waviness or imperfections. Use your magnet to check for areas of thick body filler (Bondo), a sign of previous damage repair. The magnet will not stick, or will stick weakly, to areas with filler.
3. Inspect for Straightness: Look down the length of the hood from all four corners. Check for any subtle bends, twists, or creases. A hood that isn't perfectly straight will never align correctly.
4. Examine Hinge and Latch Points: Check the mounting areas for the hinges and latch. Look for any stress cracks, elongated bolt holes, or signs of repair, which could indicate the hood came from a vehicle in a front-end collision.
5. Verify OEM Steel vs. Aftermarket: An original Ford hood will be made of stamped steel and feel relatively heavy. Many aftermarket hoods are lightweight fiberglass. If you want an OEM part, make sure you aren't buying a fiberglass copy.

Known Issues for 1987-1993 Mustang Hoods

Hood Flutter and Shake

One of the most frequently discussed problems is hood flutter at speeds above 60-70 MPH. High-pressure air builds in the engine bay and pushes up on the large, flat surface of the hood, causing it to lift and shake. This can be alarming, but it can usually be managed.

• Adjustment: The issue can often be reduced by adjusting the rubber bump stops located on the radiator core support. Turn them counter-clockwise to raise them slightly, creating more tension against the hood when it's latched. This helps hold the front edge down securely.
• Latch Position: The hood latch itself can also be adjusted to pull the hood down tighter, but this can affect alignment with the fenders and headlights, so proceed with caution.
• Aftermarket Hoods: Lightweight fiberglass hoods are more prone to high-speed flutter. For these, hood pins are often recommended for extra security.

Alignment Gaps

Getting perfect, even gaps on a Fox Body can be a challenge, especially after a minor accident or with an aftermarket hood. Adjustments can be made at the four bolts connecting the hinges to the hood (for side-to-side movement) and the four bolts connecting the hinges to the body (for up-and-down movement at the rear). It is a process of trial and error that requires patience.

Recalls and Technical Service Bulletins (TSBs)

There are no specific NHTSA recalls or major TSBs issued for the hood panel on the 1987-1993 Ford Mustang. Any recalls for this vehicle generation pertain to other systems, such as the ignition switch.

OEM vs. Aftermarket Hoods

Hood Replacement Overview

Replacing the hood is straightforward, but it is a two-person job to prevent scratching the paint or fenders.

1. Scribe Hinge Locations: Before loosening any bolts, use a marker or scribe to trace the position of the hinges on the hood. This will give you a starting point for aligning the new hood.
2. Disconnect Accessories: Unplug the underhood light (if equipped) and disconnect the windshield washer fluid hose.
3. Unbolt the Hood: While a helper supports one side, remove the two bolts connecting the hinge to the hood on your side. Have your helper do the same.
4. Lift Off: With all four bolts removed, carefully lift the hood off the car and set it aside.
5. Installation: Installation is the reverse of removal. Loosely install the bolts on the new hood. Lower it and adjust its position to match the scribe marks you made earlier. Tighten the bolts gradually while checking alignment with the fenders and cowl. Final adjustments to the latch and bump stops will be necessary.

Cost Comparison

The cost to replace a 1987-1993 Mustang hood varies widely based on the type of hood and the cost of paint.

Frequently Asked Questions (FAQ)