MANNOL Brake Fluid DOT-4 2x1L
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Product Information
Full details
This guide is for vehicle owners and DIY mechanics needing reliable hydraulic brake fluid. The MANNOL Brake Fluid DOT-4 offers a high boiling point and excellent low-temperature performance, ensuring consistent braking in all conditions. A key caveat is its aggressive nature towards paintwork, requiring careful handling during application.
All features
| Model Part Number | MN3002-1 |
|---|---|
| Brand | MANNOL |
Extended Product Information
FAQs
What is the difference between DOT-3 and DOT-4 brake fluid?
DOT-4 fluid has a higher boiling point than DOT-3, offering better resistance to vapor lock, especially under heavy braking conditions. It also typically has better low-temperature properties.
Can I mix DOT-4 fluid with DOT-3 fluid?
While DOT-4 is technically compatible with DOT-3 systems, it is generally not recommended to mix them. Mixing can compromise the performance benefits of DOT-4. It's best to use the specified fluid type or perform a complete flush if changing types.
How often should I replace my brake fluid?
Brake fluid absorbs moisture over time, lowering its boiling point and increasing the risk of corrosion. It is generally recommended to replace it every 2-3 years, or as specified in your vehicle's owner's manual.
Why is this fluid aggressive to paintwork?
Brake fluids are formulated with specific chemicals to ensure optimal performance within the hydraulic system. Some of these components, particularly glycols, can attack and break down automotive paint finishes.
What does 'high boiling point' mean for my brakes?
A high boiling point means the fluid can withstand higher temperatures before it starts to boil and turn into vapor. If brake fluid boils, it creates compressible vapor bubbles in the lines, leading to a spongy brake pedal and reduced braking effectiveness (vapor lock).
How does the boric acid in the fluid help?
Brake fluid can absorb moisture from the atmosphere. Boric acid helps to neutralize this absorbed water, preventing it from causing corrosion within the brake system components and maintaining the fluid's performance characteristics.
Troubleshooting
Brake pedal feels spongy or soft.
This could indicate air in the brake lines or that the fluid has absorbed too much moisture and its boiling point has lowered. Perform a brake fluid flush and bleed the system according to the manufacturer's instructions.
Brake warning light is illuminated.
Check the brake fluid level in the reservoir. If low, top up with the correct DOT-4 fluid and check for leaks. If the level is correct, the issue may be with the brake system sensors or the fluid requires replacement.
Fluid is discolored (e.g., very dark or cloudy).
Dark or cloudy fluid typically indicates contamination or degradation. It is time to replace the brake fluid. Perform a complete system flush.
Accidental spill on painted surface.
Immediately wipe up the spill with a clean cloth and rinse the affected area thoroughly with water to prevent paint damage.
Pros and Cons
Pros
- Provides reliable braking performance across a wide temperature range.
- Protects brake system components from corrosion and oxidation.
- Effectively manages water contamination, maintaining fluid integrity.
- Ensures consistent pedal feel due to high thermal stability and resistance to vapor lock.
- Compatible with standard brake system seals and hoses.
Cons
- Aggressive formulation requires careful handling to avoid damaging vehicle paint.
- Requires precise application to prevent spills.
- Not suitable for systems requiring DOT 3 or lower fluids without checking manufacturer specifications.
Setup, Compatibility & Care
Setup: This brake fluid is designed as a direct replacement for existing DOT-4 fluids. When flushing and refilling the brake system, follow the vehicle manufacturer's specific bleeding procedure to ensure all old fluid is removed and the new fluid is properly introduced.
Compatibility: Compatible with hydraulic brake systems designed for DOT-4 fluid. It is also compatible with elastomers typically found in brake systems. *Caution*: This fluid is aggressive towards paintwork. Avoid contact with painted surfaces. If spills occur, wipe them up immediately and rinse the area with water.
Care: Store the fluid in its original, tightly sealed container in a cool, dry place away from direct sunlight. Brake fluid absorbs moisture from the air over time, which degrades its performance. It is recommended to replace brake fluid every 2-3 years or as per the vehicle manufacturer's service schedule.