pookee

After reading all of the good reports about the Motive Bleeder I decided to order one myself and get fresh ATE TYP200 into my car.
I put a liter of fluid into the jug and after pumping it up to 10 lbs. I started to bleed the the calipers. By the way they give you about 14 inches of run off-tube that will have you cursing after it pops out of the bottle that you have to hold in one hand while using the wrench with the other.
After getting brake fluid on my wheels and body I went to the hardware store and bought 3 feet of tubing allowing me to put the bottle on the ground.
All is well now, as I can stand up now and watch the fluid get clearer and clearer, when suddenly a stream of bubbles start coming out of the caliper! I figure that this was the best thing that I have done to the car since I have been riding around with air in my lines and th brakes felt good.
Imagine how good the brakes will be now!! NOT!!
I flushed an entire Liter of fresh fluid through my right front caliper and still bubbles! <img src="graemlins/cussing.gif" border="0" alt="[grrrrrrr]" />
Lucky I orderd 2 Liters. I poured the second Liter into the jug and pumped it up to 10 Lbs. Thats when I discovered what is going on...
The pump pushes air into the new fluid and carbonates it. The 10 Lbs. of pressure keep the bubbles microscopic in size so the fluid looks air free, but in reality you are introducing air into your brake system! What a mess. <img src="graemlins/c.gif" border="0" alt="[ouch]" />

Timothy Stewart

No.

You have a leak some where.

Try pressurizing the system and
do nothing. See if it holds pressure.

In my case, I had to use teflon tape
in a couple of the joints. I also
had trouble getting a tight fit onto
the resevoir. Its awkward with the short
tube because you have to turn the bottle
to get the twist out of the tube.


tim

pookee

No leak.
I pressurized it and it holds.
You can see the bubbles in the fluid if you look close.
The pump pushes air into the fluid from the bottom.

KOAN

I've used the pressure system to flush the brakes, but do it a little differently. I have not had any spilling, or air introduced into the fluid. I use the pump dry. I fill the brake reservoir with fluid, put the pressure system on, and pump it to 10 lbs. Then, I bleed one wheel. I check the reservoir to see if there is enough fluid to attempt another wheel. If it looks close, I detach the top of the bottle, then detach the reservoir top, add fluid, re-assemble the system, and go to the next wheel. The extra steps don't add much time, but it keeps the fluid where it should be, and enables me to use only the amount of fluid I need. My Motive system stays dry and clean, and still works very well. I use the system on my S4.
I've also tried the speed bleeder screws on my 993, and like them even more. Very simple, fool proof, clean. Good pedal feel when done. I am just cautious to push the brake pedal down only 1/2 way each pump to avoid over-extending the master cylinder movement beyond what is ordinarily used. This system, though, is much easier. <img src="graemlins/jumper.gif" border="0" alt="[jumper]" />

Edward

[quote] The pump pushes air into the new fluid and carbonates it. The 10 Lbs. of pressure keep the bubbles microscopic in size so the fluid looks air free, but in reality you are introducing air into your brake system! What a mess. <hr></blockquote>

I don't think this is your problem, nor do I think it is even possible to "aerate" fluid at a scant 10psi. All the Motive pump does is create a mild positive pressure in the resevoir...that's it. Hope you iron out the issue as I have never had a problem with the Motive

Edward

last993

For the 95' 993, I know that you have to use the hose clamp to prevent the fluid to flow into the overflow tube.

Queation: where about on the tube do you guys clamp on ?....big diameter tube or what appears to be a very thin capillary tube ?

Greg Fishman

Pokee you have a problem some where. I have done exactly as you stated and get a great bleed every time. Are you sure the resivior has not been run dry? That would put air into the system.

Get a bleeder bottle from BSR, makes life a lot easier.

Greg

Ray Calvo

Pookie, I tend to agree with the others; you have a problem with the system. I have bled brake several times with it with no problems. Only time I get "bubbles" is when I run out of fluid in the bleeder tank, then the brake reservoir level drops as the system uses up this fluid.

A few times I have gotten a stream of bubbles at the caliper bleed port also. This has been due the bleed tube being a loose fit, and I get a vacuum pulled at the bleed screw as the fluid "rushes" past it into the tube ("Bernoulli's theorem" for you Mechanical/Chemical engineers

last 993: clamp the little tube at the top of the reservoir; vise grips works great - for a while. Better is to update the reservoir cap and cap off this overflow tube. Been discussed a couple of times - do a search.

HarryD

When I vacuum bleed, I get air into the system by drawing air into the bleeder screw. I use teflon tape on each screw to seal the threads. You may be doing the same via the the flow through the screw. One or two turns is all you will need.

jason952

If you have a loose fitting at the bleed screw or unscrew it too far air will be brought in as stated above. This is the major problem with my griots vaccuum bleeder, although it fits big red nipples just fine! I guess there is just something about big red nipples.....

Jason

A.J. - 95 993

First time I bled my brakes with the Power Bleeder, I had similar problems. But not before having other problems. I emptied quite a bit of fluid onto the floor because I have a 1995, and have the overflow tube that I forgot to clamp off. I clamp it with a vise grip right near the reservior, where it goes from metal tube to fabric-braided rubber hose.

Evidently it had been quite some time since anyone had bled the brakes before me. It had yellowish fluid (assumed to be the ATE) and I was using Super Blue. After opening the bleed screws, nearly all of them required hitting the caliper with a rubber mallet. The lines were actually clogged. On a few of them I had to lightly push on the brake pedal to force the old fluid out! On one of the calipers, I had the screw nearly off and still nothing came out. Once I got fluid flowing, I saw bubbles flowing as the new fluid came through, just as described by others. That was because I had the screws opened too much. At least a full turn. Now that I have a clean system and all new fluid, I break the bleed screw open with a wrench, and don't unscrew much more, if at all. That equates to unscrewing the bleed screw 45 degrees or so.