Brake Flush

[MotoMike]

I'm at 3 years on my 2021 GT and see the factory advises to do a brake fluid flush. The factory manual calls for using a pressure bleeder. I don't have one of those but have 2 vacuum bleeder devices. Would using one of those be ok?

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[Joe Gonsalves]

I also have a vacuum bleeder. Now using one of these to flush the brake fluid would take all day. And your grip would give out. What I've done in the past, was to use a bottle and some tubbing. Fill the bottle 1/4 way with brake fluid. Stick the tubbing in so it's in the fluid and close to the bottom. Starting with the right rear brake, attach the other end of the tubbing to the bleeder screw. Crack open the bleeder. Now sit in the car and pump the brakes. The action will force out the old fluid. The fluid in the bottle will prevent air from getting sucked back into the system. Once the bottle is about half full, move on to the next wheel. You may need someone to watch the bottle, but I always found that about 4 good pumps is about right. Remember to check the brake fluid reservoir as you go and top off with new fluid.

 

[MotoMike]

I also have a vacuum bleeder. Now using one of these to flush the brake fluid would take all day. And your grip would give out. What I've done in the past, was to use a bottle and some tubbing. Fill the bottle 1/4 way with brake fluid. Stick the tubbing in so it's in the fluid and close to the bottom. Starting with the right rear brake, attach the other end of the tubbing to the bleeder screw. Crack open the bleeder. Now sit in the car and pump the brakes. The action will force out the old fluid. The fluid in the bottle will prevent air from getting sucked back into the system. Once the bottle is about half full, move on to the next wheel. You may need someone to watch the bottle, but I always found that about 4 good pumps is about right. Remember to check the brake fluid reservoir as you go and top off with new fluid.

I found the vac bleeders to be pretty efficient. I have a big compressor so that might help. And both tools have a locking ring on them so you don't have to hold trigger. I removed a couple 160z bottle's worth(which is more than system holds) in just a few minutes.

This was flushing my old '88 Isuzu Trooper system and '18 F150 system. I know the Mustang probably has a more sophisticated brake system than either of those?

 

[cerbomark]

I have a used both vacuum system and a push system, both work well. My vacuum system works fast. Neither will matter and is OK to use.

 

[Joe Gonsalves]

I found the vac bleeders to be pretty efficient. I have a big compressor so that might help. And both tools have a locking ring on them so you don't have to hold trigger. I removed a couple 160z bottle's worth(which is more than system holds) in just a few minutes.

This was flushing my old '88 Isuzu Trooper system and '18 F150 system. I know the Mustang probably has a more sophisticated brake system than either of those?

I was referring to a hand vacuum pump.

 

[jacknifetoaswan]

Buy a Motive Power Bleeder. It'll save you a ton of time and effort.

JR

 

[junits15]

I think there is a brake purge procedure in forscan you can use that will make this way easier.

 

[kz]

I think there is a brake purge procedure in forscan you can use that will make this way easier.

? How do you think that would work ?

I think there might ABS pump bleed procedure. For brake system you have to physically get rid of fluid by generating pressure in the system (and provide new fluid while doing that).

 

[junits15]

? How do you think that would work ?

I think there might ABS pump bleed procedure. For brake system you have to physically get rid of fluid by generating pressure in the system (and provide new fluid while doing that).

The ABS pump is a pump, it can push fluid out of the brake system. It existed on my previous ford, and also exists on my 06 mini. I'm pretty sure its there on the mustang i just haven't personally tried it. I have a pressure bleeder and didn't feel like lugging out the laptop with dirty hands. If its there (i'm pretty sure it is) it will be better than anything else because it runs the pump for a specific length of time that is calibrated to push all the old fluid out of the lines.

Heres a video, worth a shot.

 

[WItoTX]

It will work just fine.

 

[kz]

The ABS pump is a pump, it can push fluid out of the brake system. It existed on my previous ford, and also exists on my 06 mini. I'm pretty sure its there on the mustang i just haven't personally tried it. I have a pressure bleeder and didn't feel like lugging out the laptop with dirty hands. If its there (i'm pretty sure it is) it will be better than anything else because it runs the pump for a specific length of time that is calibrated to push all the old fluid out of the lines.

Heres a video, worth a shot.

It clearly works, I was most definitely wrong. (I use Motive bleeder too)..

 

[Keeffa]

I also have a vacuum bleeder. Now using one of these to flush the brake fluid would take all day. And your grip would give out. What I've done in the past, was to use a bottle and some tubbing. Fill the bottle 1/4 way with brake fluid. Stick the tubbing in so it's in the fluid and close to the bottom. Starting with the right rear brake, attach the other end of the tubbing to the bleeder screw. Crack open the bleeder. Now sit in the car and pump the brakes. The action will force out the old fluid. The fluid in the bottle will prevent air from getting sucked back into the system. Once the bottle is about half full, move on to the next wheel. You may need someone to watch the bottle, but I always found that about 4 good pumps is about right. Remember to check the brake fluid reservoir as you go and top off with new fluid.

I've always done it like this never a problem. I hook the hose up on the car so hose runs from caliper up and down to bottle. There is a sequence to follow, I think it's rear right rear left front left front right. On the brembo 6 piston caliper do the inside first then out side. If I'm wrong about this I'm sure someone will correct me.
Enjoy...

 

[jacknifetoaswan]

I've always done it like this never a problem. I hook the hose up on the car so hose runs from caliper up and down to bottle. There is a sequence to follow, I think it's rear right rear left front left front right. On the brembo 6 piston caliper do the inside first then out side. If I'm wrong about this I'm sure someone will correct me.
Enjoy...

Outside first, then inside for the Brembos. you always go with the farthest spot form the master cylinder and work your way to the closest.

JR

 

[kz]

Outside first, then inside for the Brembos. you always go with the farthest spot form the master cylinder and work your way to the closest.

JR

Yeah, no.

For vehicles equipped with 4 or 6 piston brake calipers, bleed the inner bleeder screw first, followed by
the outer bleeder screw.

^^^ from the manual.

 

[Garfy]

I'm at 3 years on my 2021 GT and see the factory advises to do a brake fluid flush. The factory manual calls for using a pressure bleeder. I don't have one of those but have 2 vacuum bleeder devices. Would using one of those be ok?

I haven't done mine yet as I periodically check the fluid with test strips (detects copper which indicates corrosion in the steel lines) and a moisture tester (less than 1% is fine). Both tests have passed so it's fine. I think part of it is due to the very low humidity here so moisture doesn't get into the brake system like it does in places like Hawaii.

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