Renault Trafic Disc & Pad Replacement Guide

Tackling Your Renault Trafic's Front Brakes: A DIY Guide

The health of your vehicle's braking system is paramount, and when it comes to your Renault Trafic, specifically models from May 2001 to 2011 (Y to 11 reg), maintaining those front brake discs and pads is a crucial aspect of road safety. While a professional mechanic can certainly handle this job, many owners find satisfaction and cost savings in performing this vital maintenance themselves. This guide will walk you through the process, covering everything from the necessary tools to the step-by-step procedure for replacing both the discs and pads.

Essential Tools and Parts for the Job

Before you even think about getting your hands dirty, ensure you have all the required components and tools readily available. This will prevent frustrating interruptions mid-job. For a complete front disc and pad replacement on your Renault Trafic, you will need:

Parts You'll Need:

• Brake Pads: A set of 4 brake pads specifically for your Renault Trafic model.
• New Guide Pin Bolts: 4 off. These are essential for securing the brake caliper and should be replaced to ensure proper function.
• Brake Discs: A pair of new front brake discs, again, specific to your Trafic.
• Disc Retaining Bolts: 2 x M8 bolts. These small but important bolts hold the disc to the hub.

Tools You'll Need:

• Torque Wrench: Crucial for tightening bolts to the correct specifications, preventing damage and ensuring safety.
• Sockets: 12mm socket (for guide pin bolts), 18mm socket (for mounting bracket bolts), and a T40 Torx head (for disc retaining bolts).
• Mallet: A hide or wooden mallet is useful for gently persuading the old disc off the hub.
• Jack and Axle Stands: For safely lifting and supporting the front of your van. Never work under a vehicle supported only by a jack.
• Anti-Seize Compound (Copper Grease): Apply this to threads and the hub face to prevent corrosion and ease future removal.
• Syringe and Glass Jar: For safely removing excess brake fluid.
• Brake Cleaner and Small Soft Brush: For cleaning components.
• Eye Protection and Mask: Essential safety gear when working with brake dust and fluids.

Step-by-Step Disc and Pad Replacement

Follow these instructions carefully to ensure a safe and effective brake replacement. Remember, any steps marked with a bullet point are specifically for disc replacement. If you are only changing the pads, you can skip those.

1. Preparation and Initial Disassembly

• Safely lift the front of your van using the jack and support it securely on axle stands.
• Remove the cap from the brake fluid reservoir. Keep an eye on the fluid level throughout the process; you may need to draw some out.
• Remove the road wheel that you'll be working on.
• Undo the two guide pin bolts (using the 12mm socket). These bolts usually have rubber boots. Carefully lift off and support the brake caliper. A piece of wire or a sturdy hook is ideal for this, ensuring you don't strain the brake pipe.
• Remove the old brake pads from the caliper bracket.

2. Removing the Brake Disc

• Undo the M8 bolt holding the disc on. This typically requires a T40 Torx bit.
• Undo the two mounting bracket bolts (using the 18mm socket). These are usually larger bolts that secure the caliper mounting bracket to the hub assembly. Remove the mounting bracket.
• Remove the old brake disc. It might be a tight fit. Give the rear face of the disc a few gentle taps with your hide or wooden mallet to loosen it from the hub. Always wear eye protection during this step, as old brake dust can be dislodged.

3. Preparing for New Components

With the old disc removed, it's time to prepare for the new parts.

• Push in the caliper pistons. The pistons on the front brakes of the Trafic are not threaded, so they can be pushed back directly. Use a dedicated brake caliper piston retraction tool. If you don't have one, a large C-clamp can sometimes be used, but be cautious not to damage the piston or seal.
• Use a piece of wood to hold the opposite piston in place while you retract the first one, preventing it from being pushed out entirely.
• Monitor the brake fluid level in the reservoir. As you push the pistons back, the fluid level will rise. If it looks like it might overflow, use the syringe to carefully draw out the excess fluid into the glass jar.
• Clean the hub face where the new disc will sit. Apply a thin layer of copper grease (anti-seize compound) to the hub face. This will prevent the new disc from seizing onto the hub in the future.
• Clean the faces of the new brake disc with a suitable solvent (like brake cleaner) to remove any manufacturing oils or protective coatings.

4. Reassembly - Putting it All Back Together

Reassembly is essentially the reverse of the removal process. Remember to apply copper grease to all threads before assembly.

• Fit the new brake disc onto the hub.
• Secure the new disc with the M8 disc retaining bolt (Torx T40). Do not overtighten at this stage; you will torque it correctly later.
• Refit the caliper mounting bracket and tighten the two 18mm bolts. Crucially, these bolts need to be torqued to the manufacturer's specified setting. This is often a high torque value, potentially exceeding the range of a standard DIY torque wrench. You may need to borrow or hire a heavy-duty torque wrench for this step. Consult your vehicle's manual for the exact torque specification.
• Place the new brake pads into the caliper bracket. Ensure they are seated correctly.
• Lower the caliper back over the new pads and disc.
• Reinstall the two guide pin bolts (12mm). Apply a small amount of copper grease to the threads. Tighten these bolts to the specified torque.
• Replace the road wheel and hand-tighten the wheel nuts.
• Lower the vehicle off the axle stands.
• Tighten the road wheel nuts to the correct torque setting in a star pattern.
• Pump the brake pedal several times until it feels firm. This is essential to push the caliper pistons back out against the new pads.
• Check the brake fluid level in the reservoir and top up if necessary with the correct type of brake fluid. Replace the reservoir cap securely.
• Dispose of old brake fluid and parts responsibly.

Important Considerations and Tips

How to Remove Brake Calipers?

Removing the brake calipers is a key part of the disc replacement. As mentioned, you'll undo the guide pin bolts to lift the caliper off the bracket. Support the caliper securely to avoid damaging the brake hose. In some cases, especially if the caliper is heavily corroded or you need better access, you might need to remove the caliper entirely. This often involves removing the mounting bracket bolts as well. A common point of difficulty can be the wheel bearing nut. It's best to loosen this with the wheel on the ground and the brake applied, using a long bar for leverage. You'll then need to loosen the wheel nuts before lifting. Remember, reassembly of the bearing nut requires precise torquing, often exceeding 200Nm, so a suitable torque wrench is essential.

Bedding In New Brakes

After fitting new discs and pads, it's vital to bed them in properly. This process ensures optimal performance and longevity. Avoid heavy braking for the first 100-200 miles. Instead, perform a series of moderate stops from around 30-40 mph down to 10 mph. Do this about 5-10 times, allowing a short cool-down period between each stop. This helps the pads transfer a thin, even layer of material onto the disc surface, creating a perfect mating surface.

Safety First

Always prioritise safety. Wear appropriate personal protective equipment (PPE), including eye protection and gloves. Ensure the vehicle is stable on axle stands before working underneath it. If you're unsure about any part of the process, it's always best to consult a professional mechanic.

Frequently Asked Questions

Q1: How long does it take to replace front brake discs and pads on a Renault Trafic?

A1: For someone with basic mechanical experience, it typically takes around 1-2 hours per side, so 2-4 hours for both front wheels. This can vary depending on the condition of the old parts and any unforeseen issues.

Q2: Do I need to replace the brake fluid when changing discs and pads?

A2: It's not strictly necessary, but it's good practice to check the condition of your brake fluid. If it's old or contaminated, consider flushing and replacing it. Remember to top up the reservoir with the correct type of fluid after the job.

Q3: What happens if I don't torque the caliper bracket bolts correctly?

A3: Incorrect torque on the caliper bracket bolts can lead to several problems. If they are too loose, the caliper could move erratically, affecting braking and potentially causing damage. If they are too tight, you risk stripping the threads or even breaking the bolt, which can be a very costly repair.

Q4: Can I just replace the brake pads without changing the discs?

A4: You can, but only if the discs are in good condition, with sufficient thickness and no significant scoring or warping. If the discs are worn below their minimum thickness or show signs of damage, replacing them at the same time as the pads will provide the best braking performance and prevent premature wear of the new pads.

Q5: What is the significance of copper grease?

A5: Copper grease is a high-temperature lubricant and anti-seize compound. Applying it to threads and the hub face prevents corrosion, making future disassembly much easier. It also helps to prevent the brake disc from seizing onto the hub.

By following this comprehensive guide, you should be well-equipped to tackle the front brake disc and pad replacement on your Renault Trafic, ensuring your vehicle remains safe and reliable on the road.

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