Brake Bleeding Issue - Color of Motul RBF600?

***BoostJunkie*** · 03-17-2006, 04:27 PM

As I was bleeding my brakes today (with the help of spazegun2213) we encountered a strange issue. I was switching from ATE Blue to Motul and while the fluid kept getting more and more yellow it never quite got there. After going through almost an entire liter on the first caliper, the fluid still had a slight greenish tint to it. For those of you who use the Motul fluid, does it come out a pure yellow or does it have a little bit of a blue/green hue? I want to make sure all of the the ATE is out, especially after reading what can happen when the two fluids mix.

asf · 03-17-2006, 08:11 PM

Did you follow the recommended bleed pattern per teh manual?

Enough with this one post suggesting cottage cheese forms when you mix the two together, let someone figure out what is really going on before we all jump to conclusions. I honestly do not believe the two fluids cant be mixed when in the system if the fluid swap was administered under standard conditions. I would love to be proven wrong.

It should come out pure yellow. At least mine did.

***BoostJunkie*** · 03-17-2006, 09:13 PM

I haven't actually finished the bleed yet. That's my problem, I went through a full liter of fluid and it was still coming out slightly green. I need to go pick up more fluid tomorrow so I can finish up, but the question is, after going from Super Blue to Motul fluid, will there be any blue residue left behind that is not harmful, or do I need to just keep going until the fluid is coming out perfectly yellow?

**spazegun2213** · 03-17-2006, 09:27 PM

I helped boost for this install and bleed. Its the thrid set of brakes i have bled, and after a liter of fluid its still not the "gold" color it should be. All the others i have done have not taken to much time to go from blue to yellow, or vis versa. This however is still NOT yellow!!!

It keeps getting to be a lighter green, but not a yellow. I have no idea

91TB78 · 03-17-2006, 10:03 PM

Honestly, it probably is the strength of the blue coloring from the ATE fluid. If you've followed the cross-bleeding recommended by SOA, then you should be good to go, especially after a full liter of fluid.

***BoostJunkie*** · 03-17-2006, 10:06 PM

Well, I'm going to pick up more fluid tomorrow so I can finish up. Do I need to trigger ABS and then re-bleed or can I just do the front left/rear right, then trigger ABS and continue on to the front right/rear left?

asf · 03-17-2006, 10:17 PM

Lets start from the beginning. How are you bleeding?

Uncap fluid reservoir. Push pedal few times till firm, hold pedal to firewall, friend loosens bleeder, Keep pressure on brake, tighten bleeder, then pump again. Do not release the pedal when the bleeder is open. Repeat on each corner until fluid is clear on each corner.

I forget with the brembos which pot to open first but you are aware that there are multiple bleeders per corner?

Other than improper bleed order or technique, not sure why the color is still lingering.

91TB78 · 03-17-2006, 10:22 PM

asf is correct. That's how I did mine with my wife working the brake pedal. I think it's inside bleeder first, then work your way to the outside. Double check...but I'm pretty sure that's right. I think when bleeding from the stock fluid I used just shy of one liter.

AndrewSS · 03-17-2006, 11:59 PM

i know what happened ross (spaze) probably sabotaged your fluid

lol

***BoostJunkie*** · 03-18-2006, 07:20 AM

I have a bleed kit (just a hose going to a sealed bottle) so I can continuously pump the pedal while the bleeder is open. And as far as the bleed order, the only thing we did differently from what you are saying is we started with the outside bleeder on the front left instead of the inside. Does that really make a difference?

**spazegun2213** · 03-18-2006, 07:26 AM

we never made it past the first caliper

And thanks andrew

!! But i have never seen this before (and after reading the other post where they were "mixed" i was a little worried! Maybe it is just the color lingering.

We were also using a one man brake bleeder (for $7 its worth every penny!) and the diagonal bleed order with cycling the ABS (ie turning it on) 1/2 way though.

This would be my third set of brakes, and i have never had a problem. Maybe it was just our luck, sorry boost

***BoostJunkie*** · 03-18-2006, 07:29 AM

No problem, I'm actually leaving right now to run up to Agile, they have a few more bottles of fluid waiting for me. I figure I'll buy extra and if after another 1/4 liter or so the color is still there I'll just assume it's not going away.

91TB78 · 03-18-2006, 07:32 AM

First, don't just keep pumping even if you have that sealed container. Even if the container you use says that it's ok, I would do the traditional method of
friend push the brake down to the floor
you open bleed screw and wait until all the fluid comes out that will come out
You tighten
Your friend lets up
Repeat

I had the brake bleeder screws and they made more of a headache than they did to help. Perhaps I got defective ones. :?:

I don't know how much of a difference going outside first and then inside, I would just imagine you would start closest to the brake MC first to relieve the fluid that is technically in before the outer bleed nipple.

***BoostJunkie*** · 03-18-2006, 09:54 AM

I just got back with more fluid so I'm going to go give it another shot.

***BoostJunkie*** · 03-18-2006, 12:12 PM

Ok, it's done and I'm pretty sure all is well. The pedal feels very light for the first tiny bit of its travel (maybe 1/4-1/2 inch or so) and then bites like hell. Is that normal for SS lines?

03-17-2006, 04:27 PM	#1
*BoostJunkie* Sold My Soul For Mods Car: '05 CGM STi Fav Mod: Track Time Location: Bethesda, MD Posts: 6,658 IWSTI Addict since: Jun 2004 Trader Rating: (14)	Brake Bleeding Issue - Color of Motul RBF600? As I was bleeding my brakes today (with the help of spazegun2213) we encountered a strange issue. I was switching from ATE Blue to Motul and while the fluid kept getting more and more yellow it never quite got there. After going through almost an entire liter on the first caliper, the fluid still had a slight greenish tint to it. For those of you who use the Motul fluid, does it come out a pure yellow or does it have a little bit of a blue/green hue? I want to make sure all of the the ATE is out, especially after reading what can happen when the two fluids mix. This ad is not endorsed by this member. Please register or login to hide this ad.

03-18-2006, 12:12 PM	#15
*BoostJunkie* Sold My Soul For Mods Car: '05 CGM STi Fav Mod: Track Time Location: Bethesda, MD Posts: 6,658 IWSTI Addict since: Jun 2004 Trader Rating: (14)	Ok, it's done and I'm pretty sure all is well. The pedal feels very light for the first tiny bit of its travel (maybe 1/4-1/2 inch or so) and then bites like hell. Is that normal for SS lines? This ad is not endorsed by this member. Please register or login to hide this ad.

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03-17-2006, 08:11 PM	#2
asf STI Driver Posts: 294 IWSTI Addict since: Feb 2006 Trader Rating: (1)	Did you follow the recommended bleed pattern per teh manual? Enough with this one post suggesting cottage cheese forms when you mix the two together, let someone figure out what is really going on before we all jump to conclusions. I honestly do not believe the two fluids cant be mixed when in the system if the fluid swap was administered under standard conditions. I would love to be proven wrong. It should come out pure yellow. At least mine did.

03-17-2006, 09:13 PM	#3
*BoostJunkie* Sold My Soul For Mods Car: '05 CGM STi Fav Mod: Track Time Location: Bethesda, MD Posts: 6,658 IWSTI Addict since: Jun 2004 Trader Rating: (14)	I haven't actually finished the bleed yet. That's my problem, I went through a full liter of fluid and it was still coming out slightly green. I need to go pick up more fluid tomorrow so I can finish up, but the question is, after going from Super Blue to Motul fluid, will there be any blue residue left behind that is not harmful, or do I need to just keep going until the fluid is coming out perfectly yellow?

03-17-2006, 09:27 PM	#4
spazegun2213 Poor Speed Racer Car: 96 328 Fav Mod: Tightening the nut behind the wheel! Location: Northern VA Posts: 8,437 IWSTI Addict since: Mar 2005 Trader Rating: (8)	I helped boost for this install and bleed. Its the thrid set of brakes i have bled, and after a liter of fluid its still not the "gold" color it should be. All the others i have done have not taken to much time to go from blue to yellow, or vis versa. This however is still NOT yellow!!! It keeps getting to be a lighter green, but not a yellow. I have no idea

03-17-2006, 10:03 PM	#5
91TB78 S204 Racer Car: 06 IX MR Location: Minneapolis, MN Posts: 3,666 IWSTI Addict since: Mar 2002 Trader Rating: (12)	Honestly, it probably is the strength of the blue coloring from the ATE fluid. If you've followed the cross-bleeding recommended by SOA, then you should be good to go, especially after a full liter of fluid.

03-17-2006, 10:06 PM	#6
*BoostJunkie* Sold My Soul For Mods Car: '05 CGM STi Fav Mod: Track Time Location: Bethesda, MD Posts: 6,658 IWSTI Addict since: Jun 2004 Trader Rating: (14)	Well, I'm going to pick up more fluid tomorrow so I can finish up. Do I need to trigger ABS and then re-bleed or can I just do the front left/rear right, then trigger ABS and continue on to the front right/rear left?

03-17-2006, 10:17 PM	#7
asf STI Driver Posts: 294 IWSTI Addict since: Feb 2006 Trader Rating: (1)	Lets start from the beginning. How are you bleeding? Uncap fluid reservoir. Push pedal few times till firm, hold pedal to firewall, friend loosens bleeder, Keep pressure on brake, tighten bleeder, then pump again. Do not release the pedal when the bleeder is open. Repeat on each corner until fluid is clear on each corner. I forget with the brembos which pot to open first but you are aware that there are multiple bleeders per corner? Other than improper bleed order or technique, not sure why the color is still lingering.

03-17-2006, 10:22 PM	#8
91TB78 S204 Racer Car: 06 IX MR Location: Minneapolis, MN Posts: 3,666 IWSTI Addict since: Mar 2002 Trader Rating: (12)	asf is correct. That's how I did mine with my wife working the brake pedal. I think it's inside bleeder first, then work your way to the outside. Double check...but I'm pretty sure that's right. I think when bleeding from the stock fluid I used just shy of one liter.

03-17-2006, 11:59 PM	#9
AndrewSS S204 Racer Car: 05 Subaru WRX STi Fav Mod: RCE T2 Coilovers Location: Columbus, OH Posts: 4,643 IWSTI Addict since: Jun 2005 Trader Rating: (21)	i know what happened ross (spaze) probably sabotaged your fluid lol

03-18-2006, 07:20 AM	#10
*BoostJunkie* Sold My Soul For Mods Car: '05 CGM STi Fav Mod: Track Time Location: Bethesda, MD Posts: 6,658 IWSTI Addict since: Jun 2004 Trader Rating: (14)	I have a bleed kit (just a hose going to a sealed bottle) so I can continuously pump the pedal while the bleeder is open. And as far as the bleed order, the only thing we did differently from what you are saying is we started with the outside bleeder on the front left instead of the inside. Does that really make a difference?

03-18-2006, 07:26 AM	#11
spazegun2213 Poor Speed Racer Car: 96 328 Fav Mod: Tightening the nut behind the wheel! Location: Northern VA Posts: 8,437 IWSTI Addict since: Mar 2005 Trader Rating: (8)	we never made it past the first caliper And thanks andrew !! But i have never seen this before (and after reading the other post where they were "mixed" i was a little worried! Maybe it is just the color lingering. We were also using a one man brake bleeder (for $7 its worth every penny!) and the diagonal bleed order with cycling the ABS (ie turning it on) 1/2 way though. This would be my third set of brakes, and i have never had a problem. Maybe it was just our luck, sorry boost

03-18-2006, 07:29 AM	#12
*BoostJunkie* Sold My Soul For Mods Car: '05 CGM STi Fav Mod: Track Time Location: Bethesda, MD Posts: 6,658 IWSTI Addict since: Jun 2004 Trader Rating: (14)	No problem, I'm actually leaving right now to run up to Agile, they have a few more bottles of fluid waiting for me. I figure I'll buy extra and if after another 1/4 liter or so the color is still there I'll just assume it's not going away.

03-18-2006, 07:32 AM	#13
91TB78 S204 Racer Car: 06 IX MR Location: Minneapolis, MN Posts: 3,666 IWSTI Addict since: Mar 2002 Trader Rating: (12)	First, don't just keep pumping even if you have that sealed container. Even if the container you use says that it's ok, I would do the traditional method of friend push the brake down to the floor you open bleed screw and wait until all the fluid comes out that will come out You tighten Your friend lets up Repeat I had the brake bleeder screws and they made more of a headache than they did to help. Perhaps I got defective ones. :?: I don't know how much of a difference going outside first and then inside, I would just imagine you would start closest to the brake MC first to relieve the fluid that is technically in before the outer bleed nipple.

03-18-2006, 09:54 AM	#14
*BoostJunkie* Sold My Soul For Mods Car: '05 CGM STi Fav Mod: Track Time Location: Bethesda, MD Posts: 6,658 IWSTI Addict since: Jun 2004 Trader Rating: (14)	I just got back with more fluid so I'm going to go give it another shot.