Ford Transit Custom Brake Disc Care

The braking system is arguably the most critical safety feature on any vehicle, and for a workhorse like the 2017 Ford Transit Custom, ensuring its optimal performance is paramount. At the heart of this system lie the brake discs, also known as brake rotors. These spinning metal plates work in conjunction with the brake pads to slow and stop your vehicle. Over time, and with constant use, brake discs can wear down, warp, or become damaged, leading to reduced braking efficiency and potential safety hazards. This guide will delve into the essential aspects of maintaining your 2017 Ford Transit Custom's brake discs, ensuring you keep your van performing at its best and, more importantly, safe on the road.

Understanding Your Brake Discs

Before we dive into maintenance, it's helpful to understand what brake discs are and how they function. When you press the brake pedal, hydraulic fluid pushes the brake caliper pistons. These pistons force the brake pads to clamp down onto the rotating brake disc. The friction generated between the pads and the disc converts the kinetic energy of your van into heat, slowing it down. For your 2017 Ford Transit Custom, these discs are typically made from cast iron due to its excellent heat dissipation and durability. However, even the best materials will degrade with use.

Regular Inspection: The Cornerstone of Maintenance

Consistent inspection is the most effective way to catch potential problems with your brake discs before they become serious. For your 2017 Ford Transit Custom, aim to inspect the brake discs during your regular vehicle servicing, or at least every 6 months or 10,000 miles, whichever comes first. Here's what to look for:

• Visual Inspection: Look for any visible cracks, scoring, or deep grooves on the surface of the disc. A smooth, consistent surface is ideal. If you notice a significant lip forming on the outer edge of the disc, this indicates wear.
• Colour Changes: Discs can sometimes develop blueish or discoloured patches. This often indicates that the disc has overheated, which can lead to warping.
• Runout (Warping): Warped brake discs can cause a pulsating sensation through the brake pedal when you apply the brakes. This is a sign that the disc's surface is no longer perfectly flat.
• Thickness: Brake discs have a minimum thickness specification, usually stamped on the hub or disc itself. If the disc is worn below this minimum thickness, it must be replaced. This is a critical safety parameter.

How to Check Brake Disc Thickness

To accurately check the thickness of your brake discs, you'll need a vernier caliper. With the wheel removed, measure the thickness of the braking surface at several points around the disc. Compare these measurements to the manufacturer's minimum thickness specification. If any measurement is at or below this limit, replacement is necessary. For a 2017 Ford Transit Custom, refer to your owner's manual or a reputable workshop manual for the exact specifications.

Cleaning Your Brake Discs

While you can't 'clean' worn-out discs back to their former glory, you can perform some cleaning to remove surface contaminants that might affect initial braking performance. After a period of disuse, or if you suspect a thin layer of rust or grime, a gentle clean can be beneficial. Ensure the vehicle is securely supported and the wheels are removed. Use a brake cleaner spray specifically designed for automotive use. Apply it liberally to the disc surface and allow it to drip dry. You can then use a clean, lint-free cloth to wipe away any residue. Avoid using abrasive materials as these can scratch the disc surface and reduce its lifespan. It's also important to clean the brake pads at the same time, as dirt and debris on the pads can transfer to the discs.

Common Issues and Their Causes

Several factors can lead to premature wear or damage to your Transit Custom's brake discs:

• Aggressive Braking: Frequent hard braking, especially from high speeds, generates significant heat, which can lead to disc warping and accelerated wear.
• Driving Habits: Riding the brake pedal (keeping your foot lightly on the brake pedal while driving) causes constant friction and heat buildup, severely impacting disc life.
• Contamination: Road salt, dirt, and brake dust can accumulate on the discs, leading to corrosion and reduced friction.
• Worn Brake Pads: If brake pads are left to wear down completely, the metal backing plate can grind against the disc, causing severe damage and requiring disc replacement. Always replace pads before they reach their minimum thickness.
• Poor Quality Components: Using non-OEM or low-quality replacement parts can lead to premature failure and compromised braking performance.

When to Replace Brake Discs

The decision to replace brake discs on your 2017 Ford Transit Custom should be based on a few key indicators:

• Minimum Thickness: As mentioned, if the discs are below the manufacturer's minimum thickness specification, they are unsafe and must be replaced.
• Warping: If you feel pulsating through the brake pedal, especially during moderate to heavy braking, the discs are likely warped and need replacing.
• Cracks and Grooves: Significant scoring, deep grooves, or visible cracks on the disc surface are all reasons for immediate replacement. Cracks can lead to catastrophic disc failure.
• Excessive Noise: While some brake noise is normal, persistent grinding or squealing that doesn't go away after bedding in new pads can indicate worn or damaged discs.

Can Brake Discs Be Refaced?

In some cases, minor surface imperfections or slight warping can be corrected by 'machining' or 'resurfacing' the brake discs. This process involves removing a thin layer of material from the disc surface to create a flat, smooth finish. However, this is only possible if the disc is still above its minimum thickness specification after machining. For many commercial vehicles like the Transit Custom, especially when used for demanding tasks, the cost and effort of machining might not be as cost-effective as simply replacing the discs, particularly if they are close to their minimum thickness. Always consult with a qualified mechanic to determine if resurfacing is a viable and safe option for your specific situation.

Brake Disc Replacement: A Job for Professionals

Replacing brake discs is a crucial task that directly impacts your vehicle's safety. While some experienced DIY enthusiasts might tackle this, it's generally recommended to have this work carried out by a qualified mechanic. They have the correct tools, knowledge, and experience to ensure the job is done correctly. This includes proper torqueing of the wheel nuts and caliper bolts, which is essential for safe operation. Furthermore, when replacing discs, it is always recommended to replace the brake pads at the same time. Using new pads with old discs can lead to uneven wear and reduced braking performance. Similarly, it's best practice to replace discs and pads on both wheels of an axle simultaneously to ensure balanced braking.

Bedding-In New Brake Discs and Pads

After fitting new brake discs and pads to your 2017 Ford Transit Custom, it's vital to 'bed them in'. This process allows the new components to mate correctly, ensuring optimal performance and longevity. The general procedure involves a series of moderate stops from around 30-40 mph, gradually increasing speed and intensity over about 10-15 stops. Avoid harsh, emergency stops during this initial period. The goal is to gently heat the new pad material and transfer a thin, even layer onto the disc surface. Consult the brake pad manufacturer's instructions for specific bedding-in procedures, as these can vary.

Comparative Table: Disc Condition and Action

Here's a quick reference guide:

Frequently Asked Questions

Q1: How often should I check my brake discs on my 2017 Ford Transit Custom?

It's recommended to visually inspect your brake discs at least every 6 months or 10,000 miles, and more thoroughly during your vehicle's scheduled servicing. Pay attention to any changes in braking feel or sounds.

Q2: Can I just replace the brake pads if the discs look okay?

Yes, if your brake discs are still well within their thickness limits and show no signs of warping or significant damage, you can often just replace the brake pads. However, it's good practice to inspect the discs closely and consider replacing them if they have a significant lip on the edge or any scoring.

Q3: What happens if I don't replace worn brake discs?

Driving with worn brake discs significantly compromises your van's stopping power, increasing stopping distances and the risk of an accident. Severely worn discs can also lead to brake failure or damage to other braking system components, leading to more costly repairs.

Q4: Is it necessary to replace brake discs in pairs?

Yes, it is absolutely essential to replace brake discs in pairs on the same axle (both front discs or both rear discs). This ensures even braking performance and prevents the vehicle from pulling to one side under braking.

Q5: Can I use a wire brush to clean my brake discs?

It is generally not recommended to use a wire brush on brake discs as it can create micro-scratches and alter the surface finish, potentially leading to brake noise or reduced initial bite. Brake cleaner spray and a lint-free cloth are the preferred methods for cleaning.

By following these maintenance guidelines, you can ensure that the brake discs on your 2017 Ford Transit Custom remain in excellent condition, contributing to your van's safety, reliability, and overall performance. Remember, when in doubt, always consult a professional mechanic.