Motive brake bleeder

[William F.]

Are there any currently commercially available adaptors, made by Motiv or otherwise to use on 2 compartment C2 master cylinders with the Motive bleeder that won't leak-make a mess? Have seen older posts about having to make your own since Motiv one with "chains" was a PITA. Anything new that can be bought over the counter?

[Mike T.]

Re: motiv brake bleeder

William - I added power brakes to both midyear Coupes and used the Motive Adapter you see in the lower part of the attached pic. I didn't like the chain idea so a large 'C-clamp' was used and no leaks.

[Donald O.]

Re: motiv brake bleeder

Forget the chains. I use the unit pictured for my '67 with a large C clamp, but I also have a piece of flat stock aluminum between the clamp and the plastic lid. NO leaks, no problems.

DonO

[Domenic T.]

Re: motiv brake bleeder

I go from the bottom up and push the bubbles to the MC. Can't use more than 15 PSI as it will compress the bubbles.
It's a one man job, you just have to empty the MC a few times because of the volume of fluid in the lines pistons.
Top down sounds good to me but can get sloppy.

DOM

[William F.]

Re: motiv brake bleeder

Thanks to all. Michael, are the metal and what looks like a valve in line with the clear tubing items that come with the Motiv bleeder or are those item you added for a reason?

[Mike T.]

Re: motiv brake bleeder

That's just a jury-rigged setup I put together because I bought the Motive Bleeder originally with the large rectangular cover plate but when I wanted to use it on the single round master cylinder from a 65/66 I ordered up the round cover plate and just used some clear Tygon tubing and a short length of brake line (those are the cad plated fitting nuts you see in the middle) and some clamps to connect it all. By lengthening the connection between bleeder and cover plate adapter, I was able to set the bleeder outside the fender. I always double checked the connections but was concerned about potential brake fluid leaks...which never happened. Overcautious I guess.

[John H.]

Re: motiv brake bleeder

I've been using a 6" aluminum C-clamp and a 6" length of 1-1/2" square aluminum tubing to spread the load on the adapter on my '67 for many years (instead of the chains) with no problems; Motive shows my setup on their website.


BleederTank.JPG

[Richard F.]

Re: motiv brake bleeder

We have talked about this before. I found that a single clamp would not work on my 68. The cover plate must not be strong enough to resist flexing. I ended up using two clamps from Sears that I had laying around. They have rubber on the jaws and are tensioned with a pistol grip like on a caulking gun. Worked perfectly and no damage to the M/C. The Motive bleeder is one of the best investments I have made.

[William F.]

Re: motiv brake bleeder

John,
How do you keep brake fluid from overflowing out of MC when you're through bleeding and disconnect the Motiv top off the MC?
Thanks

[Patrick H.]

Re: motiv brake bleeder

John,
How do you keep brake fluid from overflowing out of MC when you're through bleeding and disconnect the Motiv top off the MC?
Thanks

This is the trick I have yet to figure out. It's not easy to determine when you've removed enough via bleeding, and when you haven't. Removing the cover and having brake fluid spill over, or overbleeding until you have a dry reservoir, are all too common in my experience.

Patrick

[Mike T.]

Re: motiv brake bleeder

I haven't found a sure-fire way to avoid the 'drips' when you do pull the adapter off the master cylinder but to minimize the leak issue, I have put the back of the car on blocks to attempt to level out the master cylinder reservoir and after bleeding off the pressure of the Motive Bleeder and removing the large C-clamp affair holding the adapter in place, I carefully remove the adapter. Being a firm believer in Murphy's Law, I also have the area under the MC and the fender typically covered in plastic and old sheets, akin to a partial mummification ritual. So far, there's only been an odd drip or two that has leaked over the edge of the master cylinder.

[Richard F.]

Re: motiv brake bleeder

I always just open one of the caliper bleeders after releasing pressure in the Motive. I just let out an ounce or two. Then I remove the cap and top off the M/C as necessary. So far no drama.

[Richard F.]

Re: motiv brake bleeder

Should have said "one front and one rear caliper bleeder".

[Donald O.]

Re: motiv brake bleeder

I release the pressure in the pressure tank, then remove the cap on the M/C. No drips and not over or under filled.

DonO

[Patrick H.]

Re: motiv brake bleeder

I release the pressure in the pressure tank, then remove the cap on the M/C. No drips and not over or under filled.

DonO

I've done the same, and it then gushes out from the overfilled master cylinder.