Ok, i have done countless hours of research on bleeding the ls460 brakes systems. There are so many different answers and protocols. There is nothing wrong with my brake system. I just want to bleed my brakes. Which i did with techstream. All went well but the fronts when bled barley any fluids came out even after doing it like 10 times on each side. Now with that being said. Upon researching apparently to bleed the front brakes. You need to disable the ecb aka ecb invalid in techstream.

Now my question is. Can i bleed the front brakes and disable the ecb? The reason why i ask is because i found the manual on doing it but you have to do all 4 brakes. I dont want to do that since i have already bled the rears. Can i just bleed the front and disable the ecb?

Also my next question is once you disable the ecb aka ecb invalid in techstream. How do you undisable it or cancel it? I have searched and searched with no answer. I just want to do the fronts. Please advise with clear instructions just for the fronts please.

 

Yes, you can just bleed front ones using Techstream. I believe, Techstream takes care of enabling necessary systems after bleeding is done if you follow the protocol.

 

I like i said i did the bleeding process in techstream but the front brakes when bled almost no fluid came out. It was dripples at most.

This is why i ask. Can i disable the ecb aka ecb invalid in techstream and then bleed the fronts. If so, how do i undisable or cancel the ECB afterwards?

 

When (what mileage) did do perform your first brake fluid flush? How many miles do you have now? If you waited too long, you might have some gunk trapped in the lines.

 

I just got this car last month at 149k. Its now 150k. As far as i know i dont believe this car has ever gotten a flush before.

Im just so confused because theres so many different information out there and most say you have to disabled the ECB in techstream ecb invalid in order to.bleed the front brakes manually. Could this be the reason why the front fluids is coming out super duper slowly?

Man i just wish someone that has bled the fronts before can chim in here that way i know. If my front brakes have a lot of gunk or maybe because i need to disable the ecb to manually bleed the fronts?

 

I have bled front breaks on my car. I just followed instructions in Techstream. It worked for me from a first attempt. I had no problems with fluid bleeding. I got my car with 150k as well and no previous bleeding done that was reflected in records.

I asked my wife for help as I don't know how it can be done with just one person.

 

My wife helped me as well. She was doing the pumping.. So you're saying when you bled the front brakes fluid was coming out smoothly? Mine was like like dribbles at most. It was like it didn't want to.come out. We did it like 10 times and finally some fluids came out but it was very very little. Definitely was flowing. Was yours flowing?

 

Yes, it was. I hate to ask, but was your wife pressing and holding the brake pedal when you were loosing the bleeding screw? It needs to be accompanied by correct procedure step in Techstrem. Is the bleeding screw rusty? How is the condition of the fluid in the brake fluid tank?

 

I apologize if your already familiar with certain steps...This is my recommendation.

The front brakes do not have a steady flow like the back brakes when following the techstream procedure for bleeding. The flow out of the front brakes is only while the brake pedal is being compressed to the floor. Once the pedal is to the floor the flow stops.

1. Hold pressure on brake pedal, open bleeder
2. Brake pedal hits floor close bleeder.
3. Foot off brake pedal

1. Hold pressure on brake pedal, open bleeder
2. Brake pedal hits floor close bleeder.
3. Foot off brake pedal
Repeat 25 times for each front brake. If you don't time the opening and closing correctly air can enter the bleeder. If you use a closed end wrench on the bleeder you can slide a clear vinyl tube over the bleeder nipple. I use a 3ft long vinyl tube so I can see the direction the fluid is flowing. Without being able to see the fluid flowing through the tube it is difficult to time the opening and closing.

Repeat over and over typically I think I've done each front 25 times. If you time your opening and closing perfectly I'm sure it can be done in fewer pumps. Either way your helpers leg will likely get tired. Sometimes I've noticed just cracking the bleeder open isn't enough. On occasion the bleeder needs to be open a 1/2 turn more to let fluid out. Don't let the reservoir run dry through the process. I usually over fill the reservoir before I start each brake to ensure there is enough fluid.

 

Yes, absolutely im definitely not new to this game. Very experienced mechanic here but it seems like this ls460 is a little more complicated and is not always nice with you if you know what i mean lol

 

Wow thank you sir.....yes this is exactly what i did. Good to know that the fronts doesn't flow like the rears.

I followed your advise and did it like 25 to 35 times per side and it finally fluid is coming out now but like you said you have to open and close it right away like in 2 secs or less and keep pumping and doing it over and over again. It still not flowing like any other cars i have done but i can safely say i did it correctly and fluids are coming out now but you have to do it quickly. Open it and close it within 2 secs or less and keep doing it repeatedly 25 to 35 times lol.

Much appreciated for your help and everyone else.

 

Bleeder screw wasn't rusty but the fluid was hella amber. I actually did 2 complete flushes. The 1st flush everything was all clear on all 4 sides of the brakes and the reservoir but after driving for 2 miles and using the brakes like crazy. When i did it again today the fluid still came out amber.

I bet i a lot of people didn't know this. For sure 1 flush will not clean out the whole braking system even you bled it on every side and it came out clear.

Drive the car 1-2 miles and use the brakes like crazy and go back and bleed it again. I can guarantee you amber fluid will still come out.

 

Fyi anyone planning on just bleeding the brakes. Do not follow this instructions. I dont care what anyone says. Its 100% wrong if you're doing just a bleed or a flush. If you do this steps. Be warned you will have all kinds of lights and your brakes will be malfunctioning. I post a picture of it.

One again if you're doing a bleed only do not follow this instructions. This instructions is posted all over the internet and members are running into major problems.

 

Wow i thought my braking power was good before now its even better with 2 complete full flushes with dot 4. Didn't use dot 3.

 

Dot 3 have longer life span but lower boiling point while Dot 4 have shorter life span when compared to Dot 3 but has higher boiling . I still use Dot 3 due longer life span. For daily use it does matter which you pick .