How to protect your engine and undercarriage in off-roading? Skid plates
In off-road driving, it’s easy to run into all sorts of obstacles. That’s why we always stress how important it is to protect your ride. We add bumpers, side steps, and even lift kits. But is raising the suspension enough to keep your engine safe? Read more about skid plates and learn how they perform in off-road conditions.
Why protect the underbody? The use of skid plates in off-road vehicles
While most off-road vehicles come with some kind of underbody skid plates, usually plastic, off-roading really calls for something tougher. The challenges you’ll face on rough trails are way more intense than just gravel crunching under your tires. On extreme tracks, you could run into rocky slopes, deep ditches, or even fallen tree trunks.
The engine, transfer case, oil pan, transmission housing, and other parts are especially at risk in these kinds of situations. If any of them take a hit, you might find yourself needing a tow truck! That’s why we’re all about prevention over cure, and we recommend getting skid plates before you hit the trails. These skid plates absorb the impact, protecting key components from damage and saving you from getting stuck out there.
Steel or aluminum – which is stronger? Types of skid plates for the underbody
Skid plates for serious off-road vehicles generally come in two types: steel or aluminum. Lighter vehicles like ATVs may use plastic plates, but heavy off-road vehicles can and should opt for sturdier protection.
Steel skid plates for vehicles
Steel plates are the most effective and durable underbody protection, and they also cost less than their aluminum counterparts. The most important feature is their high durability and ability to distribute the impact force, allowing the vehicle to slide over obstacles like rocks or tree trunks.
However, they are also more prone to rust (any scratch poses a risk of corrosion), and if not regularly maintained and repainted, their lifespan can be shortened. Additionally, steel plates are heavy. It’s important to consider this extra weight, especially if you’re loading your vehicle with other heavy accessories. The weight can’t only pull the car down and put stress on the drivetrain but also affects fuel consumption. Either way, it’s the best choice for rocky terrains where the impact force is really high!
Aluminum skid plates for vehicles
Aluminum plates provide less effective protection. They are also more flexible, making it easier for them to deform when driving over obstacles. Ironically, these dents are harder to repair compared to steel plates.
The good thing is, aluminum is more resistant to corrosion, so it lasts longer without the need for constant maintenance. Aluminum plates are also significantly lighter (sometimes up to 50% lighter), which means they don’t negatively impact the vehicle’s aerodynamics, and might even slightly improve it. However, this comes with a higher price tag. Is it worth paying more? If you often travel on regular roads and only go off-road in light terrain, where the main challenges are soft ground and minor obstacles, then yes. Ultimately, the final decision depends on what matters most to you.
What other features do skid plates have?
Now that you have an idea of which type of skid plate might suit your off-road vehicle, let’s look at the other factors to consider.
Thickness and dimensions
The durability of skid plates is determined not only by the material but also by the thickness of the plate itself. Both steel and aluminum plates are available in different thicknesses. Steel can be thinner than aluminum and still provide good protection. Keep this in mind when choosing a product. The rule here is simple: the thicker the material, the more resistant it is to damage. However, this also adds extra weight to the vehicle.
In terms of dimensions, the width of the plate is also crucial, as it determines how much of the vehicle’s underside is covered. The more comprehensive the coverage, the better the protection.
Fit and installation
But be prepared to do some cutting. Does this guarantee better protection? Not necessarily, as dedicated plates are pre-designed to protect the key parts.
The most convenient option is to get skid plates specifically designed for your vehicle model. When choosing one, pay attention to your engine type, as this will determine where the holes for drainage plugs (like the oil plug) need to be. If necessary, you can also modify a piece of metal to create your own skid plate. But be prepared to do some cutting. Does this guarantee better protection? Not necessarily, as dedicated plates are pre-designed to protect the key parts.
For skid plates to do their job properly, they need to be securely attached to the vehicle and be strong themselves. So, make sure the welds and mounting points on the product you choose are good quality. If you go for steel plates, it’s best if they’re powder-coated, which gives them extra protection against rust. Also, pay attention to the installation height. If the plate is mounted too low, it could affect your vehicle’s off-road capabilities.
Ground clearance and approach/departure angles
The thickness and installation of the skid plate can impact your vehicle’s off-road performance. If the plate is too thick and mounted too low, it might reduce your ground clearance, causing the underbody to scrape against obstacles in areas where this wasn’t previously an issue.
The same goes for the approach and departure angles. The design and shape of the skid plate under the bumper can affect these angles if you don’t consider these factors when fitting it to your vehicle. So, keep in mind that every new accessory will impact on your car, so choose them with that in mind!
Ventilation and finish
A skid plate is a solid piece of metal protecting the important systems of your vehicle. To be truly effective, it needs to be well-designed. Proper ventilation holes are important to prevent overheating of the undercarriage components and to avoid debris buildup that could cause damage. Look for models with extra protective coatings, such as powder coating, to extend the life of your underbody protection.
Which skid plates to choose? Pros and cons, and recommended products
There’s never a simple answer to that question. It really depends on many factors, like what you’re looking for. Are you after durability or lightweight options? Are you trying to save money or go for a premium product? Do you want a complete set, or maybe a hybrid approach? Some off-road drivers opt for aluminum plates where weight reduction is key, and steel plates where reliable protection from heavy hits is a must.
Is this really the best approach? There are as many opinions as there are people. If you already have a well-built vehicle, adding some weight to the center might be a good option. There are countless scenarios to consider, but the most important thing is to choose an accessory that meets your actual needs. We’ll make it easier for you by briefly outlining the pros and cons of each type and recommending some solid skid plates.
Aluminum skid plates: pros and cons
Pros
- Long lifespan
- Highly resistant to corrosion
- No need for extra coatings
- Less extra weight on the car
- Ideal for overlanding and light off-road conditions
Cons
- Less resistant to deformation
- Higher price
Steel skid plates: pros and cons
Pros
- Highly resistant to damage
- Allows sliding over obstacles
- Most effective underbody protection
- Lower price
- Extremely durable in harsh off-road conditions
Cons
- Adds extra weight to the vehicle
- Highly susceptible to corrosion
- Unfinished surfaces are prone to rust
- Lower fuel efficiency
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