A Practical Guide to Replacing Disc Brake Calipers on Your 1967-1977 Mercury Comet
Restore confidence in your classic Comet's stopping power by choosing the right replacement calipers.
- Always replace calipers in pairs to ensure safe, balanced braking.
- Choose a caliper with a powder-coated or zinc-plated finish to prevent rust.
- Verify the correct part for your Comet's specific year range (1967-70 vs. 1971-77).
- Plan to replace the flexible brake hoses at the same time as the calipers for best results.
Understanding Your Comet's Calipers: Two Generations
Before buying a new disc brake caliper for your Mercury Comet, it's important to know that this model spanned two different Ford platforms. This affects which parts will fit your car.
- 1967-1970 Mercury Comet: These earlier models are based on the Ford Falcon chassis. They may have featured a four-piston caliper design if equipped with disc brakes from the factory.
- 1971-1977 Mercury Comet: These later models share their platform with the Ford Maverick. They typically use a single-piston, floating caliper design.
Many Comets originally came with drum brakes on all four wheels, so disc brake conversions are very common. If you are replacing calipers on a converted car, you must identify the source of your conversion parts (e.g., from a Granada, Maverick, or an aftermarket kit) to get the correct replacement caliper.
Symptoms of a Failing Brake Caliper
Because these cars are now several decades old, caliper failure is common due to age, rust, and worn-out seals. Watch for these warning signs:
- Vehicle Pulling to One Side: When you brake, the car may pull left or right. This can be caused by a stuck caliper piston that is either always applied or not applying at all.
- Spongy or Soft Brake Pedal: If the pedal feels mushy or sinks to the floor, it often points to a leak in the system. Caliper piston seals are a common source of these leaks.
- Brake Dragging: A caliper piston that fails to retract will keep the brake pad pressed against the rotor. You might notice resistance while driving, poor fuel economy, or a burning smell after a drive. You can check for this by raising the front of the car and trying to spin the wheels; a dragging caliper will make the wheel hard to turn.
- Visible Brake Fluid Leaks: Look for wet, oily spots on the inside of your front wheels or on the caliper itself.
- Uneven Brake Pad Wear: When you inspect your brake pads, if one side is significantly more worn than the other, it's a strong sign of a sticking caliper.
Choosing the Right Aftermarket Caliper
New Original Equipment (OEM) calipers for a classic Comet are no longer available. Your choice is between new aftermarket parts and remanufactured calipers. For this vehicle, most available calipers are remanufactured.
Pro Tip: Always Choose Coated Calipers
Many remanufactured calipers come as bare cast iron and can show surface rust quickly. Look for calipers that are powder-coated or have a zinc-plated finish. This coating provides excellent rust protection, keeps them looking good, and extends their life.
| Brand Tier | Brands | Honest Assessment |
|---|---|---|
| Good | Raybestos, Centric | These brands are well-regarded in the brake industry. Forum users and mechanics often report good experiences with their quality and fitment for classic cars. Centric is often noted for having a good core cleaning process, and Raybestos is a dedicated brake company. |
| Standard | Cardone (A1 Cardone) | Cardone is one of the largest remanufacturers and their products are widely available. Quality can be inconsistent; some users have no problems, while others report issues with finish or longevity. They are a budget-friendly and functional choice. |
| Standard | BBB Industries, Dynamic Friction | These brands are available from many suppliers and serve as standard replacements. However, there is less specific feedback about them in classic Ford forums compared to the other brands. They are a viable option if other brands are not available. |
Estimated Costs for Caliper Replacement
| Part or Service | Estimated Cost |
|---|---|
| New Aftermarket Caliper (per side) | $39 - $152 |
| Shop Labor (per pair) | $150 - $300 |
Don't Forget the Core Charge!
Most remanufactured calipers have a "core charge" added to the price. This is a deposit that you get back when you return your old, rebuildable caliper. Don't throw your old parts away!
Frequently Asked Questions (FAQ)
Should I replace calipers in pairs?
Yes, absolutely. Brake components should always be replaced in pairs (both front calipers, for example) to ensure even braking performance and prevent pulling. If one caliper has failed due to age, the other is likely near the end of its service life as well.
Do new calipers come with pads and hardware?
It depends on the part. "Loaded" calipers come complete with new brake pads and installation hardware. "Unloaded" or "Semi-loaded" calipers are just the caliper body itself, and you will need to buy pads and hardware separately. For a full brake job, a loaded caliper can save time and ensure all components are new.
What else should I replace with my calipers?
It is highly recommended to replace the flexible rubber brake hoses that connect to the calipers at the same time. Old hoses can deteriorate internally, swell, and trap fluid, causing the caliper to stick. You will also need fresh DOT 3 brake fluid to bleed the system.
Can I rebuild my own Comet caliper?
Yes, rebuild kits with new seals and pistons are available. However, if the caliper bore is rusted or pitted, the caliper cannot be rebuilt and must be replaced. Given the low cost of a complete remanufactured caliper, most owners find it easier and more reliable to simply replace the entire unit.
Technical Specifications
Caliper Type: Single-piston floating (common on 1971-1977 models) or four-piston fixed (found on some 1967-1970 models and conversion kits). Piston Material: Steel or Phenolic. Phenolic pistons are less prone to corrosion and transfer less heat to the brake fluid.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- 🛍️ Shop This Part
- Understanding Your Comet's Calipers: Two Generations
- Symptoms of a Failing Brake Caliper
- Choosing the Right Aftermarket Caliper
- Pro Tip: Always Choose Coated Calipers
- Estimated Costs for Caliper Replacement
- Don't Forget the Core Charge!
- Frequently Asked Questions (FAQ)
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