No brakes-1977 911

[PatrickM]

Well, I must have done something incorrectly. I decided to replace my front calipers and pads with a set of "S" calipers that I recently picked up. I used my Motive pressure bleeder like I used the last time I replaced the fluid only this time, something is wrong. I used the wood block to the pedal technique when replacing the calipers to retain some of the fluid. I left the block in place when bleeding the brakes, which I think might have caused the problem. Not sure. Someone, anyone? I am thinking of having a buddy press the brake pedal while I re-bleed the system in hopes that it corrects the problem.

Thanks, Patrick

[Dan in Pasadena]

Patrick, Someone is going to post it so I may as well be first. Did you mount the caliper upside down - meaning wrong side-to-side? Because you need the bleed nipple to be pointed up.

I don't THINK leaving the wood block in place on the pedal would be an issue unless the fluid level in the reservoir was very low when you released the pedal, sucking in air.....a long shot.

[PatrickM]

Hey Dan. Nope, they are on correctly. The bleed nipples are pointed up! I just think that there might be a bunch of air in the system that needs to be pushed out. Ugh. What a PITA things can be sometimes. Thanks for the suggestion though.

-P

[Howard M]

I think the wood on the pedal technique covers the orifice that connects the reservoir to the ms piston, that's why it doesn't leak from the open caliper (finger over the straw). Fopr the same reason it will also prevent, or impede, pressure from the Motive bleeder from pushing out the fluid from the caliper nipple. Try bleeding again without the wood block.

Howard

[PatrickM]

Howard, boy do I hope that you are right. That would really make me feel a lot better. Thanks !

-P

[unimog406]

howard's right on, otherwise you would blow out your resevoir every time you tried to slow down

[JP911]

When I bleed using the Motiv power bleeder I don't touch the brake pedal until I'm finished bleeding. Pedal has always been rock solid as a result.

[PatrickM]

Thanks for all of the suggestions and help. I think that it was as simple as not bleeding the inner bleed screw on the front "S" calipers. I am not used to bleeding two screws per caliper. All seems to be good now.

-Patrick