Classic Car Brake Fluid Change
Often overlooked on collector vehicles, regular brake fluid changes are a sure fire way to keep you safe and save hundreds of pounds on a brake rebuild.
We use Millers Classic or Performance brake fluid to the specification required by the vehicle
From £85 inc VAT
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Why do you need to change your brake fluid?
Most classics use DOT 4 brake fluid, which is hygroscopic, meaning it naturally absorbs moisture from the atmosphere. In the UK, it typically takes around two years for the water content to reach levels that begin damaging the inside of your braking system.
As the fluid ages, corrosion forms within the master cylinder, servo, and caliper pistons. Over time, two serious issues can occur:
- Rust particles break loose, circulating through the system and damaging seals.
- Eventually, one or more components seize completely. Compromising both safety and reliability.
Routine brake fluid changes are a simple, cost-effective way to prevent these risks and keep your braking system performing as it should.
How often should it be changed?
When brake fluid is fresh it is a yellow colour. You want to change it when it looks closer to a bronze, which is when it is two years old.
At this point, the old fluid should be removed from the reservoir, replaced with fresh fluid, and the brakes bled until the pedal feels firm. Finally, the reservoir is topped up to the correct line, and the cap cleaned before refitting, ensuring the system is sealed and protected.
How much does it cost?
One a well maintained car the process is the same whether you own an MGB or an Aston Martin DB4 and costs £85 including labour, fluid and VAT.
If the brake fluid has turned black then it will be time for a very careful clean of your brake system before replenishing the fluid. This is more difficult to put a price on. Best case will be £195 including VAT, but you may need components rebuilding or replacing. We will be able to quote once we have seen your vehicle.
Is there a fluid that lasts longer and gives better performance?
Silicone brake fluid is available and often used when we scratch-build braking systems. It is a “life” product, offering a higher boiling point and the advantage of not being hygroscopic. Many performance road cars make use of it.
However, while it has clear benefits, it must be used with great care. Silicone and conventional DOT 4 brake fluid are incompatible, even the smallest trace of residue can cause the fluids to congeal, rendering the system inoperative.
For this reason, we only recommend silicone brake fluid for brand-new or completely rebuilt braking systems.
Get your car booked in today
With a dedicated Millers Oils service team we can provide a rapid response for servicing and MOT’s. Call us or click the button below to contact us and we can have your classic collected and on the ramp in just 24 hours!
CALL – 01869 221 870
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