Sometimes things simply don’t walk to plan and also even simple jobs can turn into a best pain in the jacksie. Not to worry, we’ll obtain it figured out really shortly.

You are watching: No brake fluid to rear brakes when bleeding

Brakes won’t bleed? Your brakes may not bleed for number of reasons, but the top 5 most common issues are:

Incorrect bleed procedureBleed screw faultFlex water tap faultCaliper faultCaliper mistakenly fitted

In this short article we’ll cover each of the top 5 in better detail and what you deserve to do to resolve them. We’ll also have a look at a couple of other feasible causes too.

Warning, some cars space fitted through dynamic braking systems, these systems deserve to be danger to job-related on there is no disabling lock first. Inspect if your car is fitted through a brake help system.

1 incorrect Bleed Procedure


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Bleeding the brakes on some cars won’t even require remove the wheels, (most cars will certainly however and also the wheels periodically stick come the hub) usually there’s enough access to the bleed screw.

The release man now fits a ring/box wrench and a clear hose with catch bottle. Clear hose enables you check out the fluid run clean and totally free from air, yet it’s no essential.The release guy opens the bleed screw and also fluid rushes with the water tap to the catch bottle. A dab that grease roughly the bleed screw threads prior to opening come bleed prevents air sneaking in when bleeding.The release male closes the bleed screw and also calls out to the brake male to start pumping once again.

Step 3

Check the liquid level and also top up before moving to the following wheel.

This procedure is recurring on every wheel, two to three times every brake caliper/cylinder until the capture hose is bubble-free.


Gravity Bleeding


This is probably the easiest method to bleed brakes. Optimal up the brake fluid reservoir and simply attach the brake hose and catch bottles to all 4 brakes in ~ once. Yes, you’ll require four record bottles ideally to bleed the entirety system.

Open the bleed screw and permit the device to me bleed, but you’ll require to examine in ~ above the fluid level. This brake bleeding might take some time and also you’ll require a dab that grease around the bleeder threads.

Gravity bleed is good for older standard cars whereby pumping the brake pedal to the floor operation a genuine risk that damaging the grasp cylinder seals.

One man Brake Bleeding


This is a one-man job and also the method commonly provided to bleed brakes today. A an easy bottle 1/4 filled with fresh fluid, it’s necessary that the bleed hose is listed below the fluid level in the record bottle.

Top increase the fluid reservoir and connect the hose and also open the bleed screw. Now you are complimentary to pump the pedal, three to four times. The old liquid is pumped into the catch bottle along with the air.

The reservoir is topped up prior to moving come the following caliper/cylinder.


Brake Bleeding Tools

A great brake bleeding device does make life a lot of easier but it isn’t essential. The key dealer will have a an extremely sophisticated electronic bleeding an equipment that pushes fluid through the liquid reservoir under pressure.

The technician just opens each brake bleed screw in rotation.

Inexpensive handheld bleeding kits will perform the job too. Two varieties are typical one pressurizes the system through the reservoir and also the other is a vacuum pump the draws the liquid out through the brake bleed screw.

Both species work well yet I choose the an easy one-man vacuum bleed type, i beg your pardon you’ll find listed here on the Brake repair tools page.

2 Brake Bleeding Screw Fault


The brake bleeding screw is a hollow screw the is positioned in ~ the highest point on the exterior that the brake caliper’s liquid chamber or wheel brake cylinder. It is a business screw that’s used to remove air from the brake system.

These tiny guys live appropriate on the brake caliper, castle live in among the most difficult environments. The warmth from the caliper, moisture from the road, and winter road salts cause the bleed screws to end up being corroded and challenging to remove. And if that wasn’t poor enough, the screws space hollow and easily broken.

It’s not unusual to damage the bleed screw once removing, causing it to leak and permit air right into the brake system.

This is often where a an easy brake bleed job goes t**s up. If the bleed screw (aka bleed nipple) shears turn off or allows air into the system, friend can’t drive your car.

Other typical problems v bleed screws includes:

BlockageLeakingBlockage of the screw bleed i is common when the dust cap is missing. Moisture and crap it s okay in and also blocks it increase solid.

A leaking bleed screw can be resulted in by corrosion ~ above the tapered seat. The screw chair seals the caliper fluid chamber once tightened. Part bleed screw seats will corrode inside, specifically in systems where the brake fluid was neglected for years.

A corroded bleed screw seat will attract air right into the system and prevent the device from bleeding.

Things you have the right to check:

Blockage in the bleed screwLeaks around the bleed screwCorrosion in the seat of the screw

3 Flex hose Fault

The brake Flexi hose has vital job, first, it must lug the liquid to the dynamic brake caliper.

The Flexi hoses are flexible for an excellent reason. A automobile chassis is rigid but the car’s suspension is constantly relocating around, the Flexi hoses leg the gap.


Brake hoses also have to deal with cycling internal brake pressure, it’s a tough environment, add age and contaminated brake fluid and also eventually, they rest down.

Any restriction in a brake hose will reason problems once bleeding the brakes.

Common difficulties include:

Internal wall surfaces rottingBlockageLeaking indigenous fittingsKinkedClamp corrosion

Let’s take a watch at each of this guys and also see exactly how they could cause problems as soon as trying to bleed the brakes.

Internal brake hose rotting, happens in enlarge cars, led to by age and also contaminated brake fluid. Strips of the inner rubber wall start to peel off and act as a inspect valve. Girlfriend may uncover the brake will work a tiny bit, however won’t relax fully. Plenty of mistakenly replace the caliper.

A blockage in the hose may be brought about by bad contaminated fluid. A common cause of pollution is mix synthetic and also mineral brake fluid, quickly done and can it is in expensive to repair.

The inner wall of the hoses collapsing will reason a total blockage.


Checking because that a blocked hose:

Using a screwdriver, try to bar the piston back, if it stops working to move, open the bleed screw and try again. If it move now, you have a clogged hose.

Leaking indigenous the fittings is usually about the steel crimp seal. The leak may not necessarily be evident, together the inner wall may it is in leaking into the outer wall of the brake hose. You might see a bulge in the brake hose as soon as the device is pressured.

A kinked brake water tap is conveniently done, you eliminate the caliper to fit brand-new brake pads, and the caliper twists, that’s sufficient to put a kink in the hose and also create a restriction to flow which will cause issues bleeding the system.

Brake water tap clamps are metal clamps fitted around the rubber brake hose. As the automobile gets larger the clamps corrode and also choke the brake hose. This will restrict flow and also cause problems braking and also bleeding the system.

Things you can check:

Examine the hoses carefullyCheck because that bulges under brake pressure

4 Brake Caliper Fault

The caliper is the organization end of the brakes. So far we’ve looked at contents that get fluid to the calipers. Currently let’s have actually a look at the main troubles with the calipers themselves, lock include:

Seized slide pins/railsSeized pistonsSeals leakingBrake caliper sliding pins

Seized sliding pins are most likely the most common brake caliper problem. The contemporary brake caliper is known as a free-floating caliper. The basically means it’s no fitted rigidly to the hub, instead it floats on sliding pins.

The pins space greased and fitted v protective rubber boots. The boots on larger cars break down and permit moisture in, followed by corrosion adhered to by brake pen seizure.

The pen seizure won’t stop the brakes from gift bled successfully, yet the seized pin will reason an inexplicable brake pedal feel and also probably a sticking wheel.


A seized caliper piston will cause the brake pedal to feeling horrible and will sometimes reason a creaking noise once the brakes space applied.

A caliper piston seizes or partially binds in the caliper usually due to the fact that of moisture in the brake fluid.

Brake liquid is hygroscopic, it attractive moisture and also the moisture eventually assaults the steel pistons of the caliper turning them rusty and causing them to bind.

Most calipers will have one piston, power cars will likely have two pots every caliper. A seized caliper choose a seized sliding pin won’t prevent you from releasing the liquid from the caliper, yet the pedal won’t feeling any better after you’ve bled it.

I’ve consisted of both of this faults together they’re common, even though lock don’t directly affect the bleeding process.

Checking for a seized caliper:


Using a screwdriver, try to bar the piston back, if it falls short to move, open the bleed screw and try again. If the still won’t move, the caliper is seized.

A leaking piston seal will reason a fluid leak and also air to get in the brake system. Brake caliper seals leak generally since of wear & tear. Calipers space fitted through rubber seals, an outer seal to avoid dirt from getting onto the cylinder, and a piston seal.

As the piston travels throughout corrosion top top the wall of the cylinder, it damages the seal and a fluid leak develops.

5 Brake Caliper wrongly Fitted


If you have actually removed her calipers for any kind of reason or her fitting brand-new ones, check that they’re on the correct side. Installation the right-hand caliper top top the left side and vice versa is a really straightforward mistake to make, there’s no dead in it, can happen to a Bishop.

A caliper will most likely be significant “L” and also “R” because that left and also right, but one more easy means to know which is which – the bleed screw is constantly at the highest component of the caliper once it’s fitted.

Having the calipers mixed up (left ~ above the right side etc.) will cause the bleed screws to be positioned at the bottom that the caliper. Trapped wait will constantly make its way to the highest component of the caliper and also that’s why we always fit a caliper v the bleed screw in the direction of the top.


A faulty understand cylinder is additionally a feasible fault, to eliminate it together a suspect, clamp off all four Flexi hoses and also pump the brake pedal. If the pedal is firm and holds pressure, the grasp cylinder is OK.

Having a workshop hands-on for your auto is always a good plan, they only price a couple of dollars however will save you a packet. Good manuals cover repair diagrams, wiring diagrams, device operation overview, troubleshooting sections, fastener torque specs, and also sequences, etc. Every mission-critical info.


Check the end all the tools I use right here on the “Brake repair devices page.” and also if you require brake device parts examine out the Amazon link below for cracking deals.

See more: Toshiyana Font For Go Sms Pro 1, Font Sms (Pro) 2

Amazon Brake system Parts

Related Questions

What wake up if i don’t bleed mine brakes? Your brake pedal will feel spongy and your braking pressure is dangerously decreased by waiting in the brake lines.