Welcome to Miller Brothers Auto Repair Shop and Collision Center, Corryton, TN!

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7123 Tazewell Pike

Corryton, TN 37721



(865) 689-5072

FAX: (865) 689-7765



Everything About Car Frame Damage Explained

Nov 21, 2023 | auto repair

car frame damage

car frame damageThe car frame, often called the chassis, is like the skeleton of a vehicle. It serves as the structural foundation upon which all other vehicle components are attached. In many ways, it’s the backbone that keeps everything together. Without a sturdy and intact frame, a car’s overall performance and safety can be seriously compromised. Here’s what you need to know about car frame damage.

Causes of Car Frame Damage

Frame damage in cars typically occurs as a result of accidents or prolonged wear and tear. Let’s explore the various causes:

Accidents: Car accidents, whether minor fender-benders or severe collisions, are a common cause of frame damage. The force generated during an impact can bend, twist, or deform the car’s frame, leading to structural issues.

Hard Driving: Aggressive driving, rough terrain, and heavy loads can contribute to frame wear and tear over time. Prolonged exposure to these conditions can weaken the frame’s integrity.

Types of Frame Damage

Corner/Sway Damage

This type of damage often occurs when a car collides with an object using its corners, such as when swerving to avoid an obstacle or making a sharp turn.

Signs of sway damage include the car pulling to one side while driving, a feeling that the car is not aligned correctly, vibrations, unusual noises, and adverse effects on other components like the suspension, brakes, tires, and transmission.

Early detection of sway damage allows for correction using specialized frame-pulling machines available at collision centers, minimizing further damage and restoring safe driving conditions.

Mash Damage

Mash damage typically results from front or rear-end collisions.

Modern car frames are designed to crumple and absorb the impact energy to protect passengers. Repairing mash damage can be costly, often involving cutting and replacing the damaged frame sections, such as radiator support brackets.

Twisted/Sagging Damages

Twisted or sagging frame damage is not always apparent during regular driving and often requires professional auto inspection.

car frame damage

Visible gaps between body components may indicate this type of damage, which can be caused by uneven frame wear over time or as a result of accidents.

Twisting damage, in particular, can be challenging to diagnose without thorough assessment.

Midwest Chassis Syndrome (Frame Rot)

This type of damage is unique to regions with harsh winters and heavy road salt usage.

Road salt and moisture accelerate the oxidation (rusting) process on the underside of vehicles, leading to excessive frame corrosion.

To prevent frame rot, vehicles can undergo “underspraying,” where a protective oil mixture is applied to the underside. Neglecting this protection can result in a severely rusted frame.

Assessing Frame Rust

Identifying frame rust is relatively straightforward. Inspect the vehicle’s underside, paying attention to areas like the front, rear, frame rails (or sides for unibody designs), and wheel wells. Distinguish between surface rust and frame rot by scratching and probing the affected areas. Minimal rust flaking indicates surface rust, while excessive rust and frame penetration signal frame rot.

Dangers of Rotted Frames

When rust affects critical frame areas like wheel wells and suspension components, the vehicle becomes unsafe to drive. A rusted frame can buckle under pressure, leading to potential tire failures and dangerous accidents. In extreme cases, vehicles have even split in half due to extensive frame rust.

Repairing Frame Rust

The extent of rust determines whether repairing the frame is worthwhile. In cases where rust is limited to a specific area, it may be possible to replace the corroded frame sections with suitable-grade steel, followed by welding. However, extensive rust that spans the length of the vehicle or compromises a significant portion of the chassis may not be cost-effective to repair, except for sentimental or personal reasons.

Car frame damage in Knoxville TN is a critical issue that can arise from various causes, including accidents and prolonged wear. Different types of frame damage require specific approaches to repair, and early detection is essential to prevent further issues. Rust-related frame damage is particularly common in regions with harsh winters and road salt usage, underscoring the importance of protective measures and regular inspections.

If you suspect frame damage in your car, call Miller Brothers Transmission Auto Repair and Body Shop now and we’ll assess the vehicle promptly to ensure safety and address any necessary repairs.

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Miller Brothers Transmission Auto Repair and Body Shop
7123 Tazewell Pike
Corryton, TN 37721
(865) 689-5072

Serving Knoxville, TN and Knox County

Service areas include: All of Knox CountyCorrytonFountain CityHalls CrossroadsPowell and Knoxville

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Monday-Friday 8:00am – 5:30pm

Saturday 8:00am – 12:30pm


Phone: (865) 689-5072

Email: millerbrothers06@comcast.net

Miller Brothers Auto Repair
7123 Tazewell Pike
Corryton, TN 37721