 Bleeding Brakes - Can't Get Any Pedal Pressure |
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| ThinAir |
 Mar 19 2009, 07:06 PM
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Best friends  Group: Members Posts: 2,569 Joined: 4-February 03 From: Flagstaff, AZ Member No.: 231 Region Association: Southwest Region 
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Well, I've searched, but there are so many responses about bleeding brakes that it's almost impossible to sort through them... so I'll ask.
I replaced the front calipers on the '70 with a pair of those pretty ones from Eric. When I put the car up on stands for the job I had good brake pedal pressure. Now that the new calipers are installed and the lines reconnected I've bled the brakes. I blocked the reservoir vent. I use a Motive Power Bleeder. I'm sure that I'm not getting any air out of the bleeders at the wheels, yet I have no resistance when I press the brake pedal - it just goes straight to the bottom. It seems unlikely that the MC would go so suddenly, so I'm wondering what else it could be. As always, this is work that is being done last minute to get my son's car ready for this weekend's Route 66 Ramble. Despite lots of trying, things never seem to get done well ahead of time! |
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| PRS914-6 |
Mar 21 2009, 11:21 PM
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Excellence Magazine Project 914 3.6 Group: Retired Members Posts: 1,278 Joined: 20-May 06 From: Central California Member No.: 6,031 Region Association: None  |
I have had great success with the Motive system. My wife wanted to have a party after I bought one (IMG:style_emoticons/default/biggrin.gif)
One of the problems that I see a lot is pumping the brakes too quickly......Doing so breaks the bubbles up finer and makes them tough to remove. Gently strokes are the key. Both up and down. If you are having a tough time getting it bled, try 5 gently pumps, hold down the peddle and crack the bleeder. (start at the longest line) Do not raise the peddle until the bleeder is closed. Raise gently and repeat numerous times. You can do this with a Motive bleeder hooked up and it works great. Make sure that when you test (no Motive) that the cap is removed from the vent!!!! If the system is empty and you try to bleed with the bleeder screw always open, the air can go back and forth and never departs as you pump the brakes. Also make sure your calipers are on with the bleeder at the top and not the bottom. It's been done on the Pelican Board more than once. Lastly, re-bleed the next day, I always get a few more bubbles out, If all else fails, use a syringe (or Motive) and pressure from the bleeder up. It's easier to get the bubbles out since it's up hill. Good Luck..... |
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Posts in this topic
ThinAir Bleeding Brakes - Can't Get Any Pedal Pressure Mar 19 2009, 07:06 PM
davesprinkle
Well, I've searched, but there are so many re... Mar 19 2009, 07:43 PM
ThinAir
You've still got air in the master cylinder. ... Mar 19 2009, 11:03 PM davesprinkle
You've still got air in the master cylinder.... Mar 19 2009, 11:32 PM ThinAir
B-- it'll save your marriage.
Gee... that... Mar 19 2009, 11:59 PM Heeltoe914 :agree: : But also make sure you only go about 3... Mar 19 2009, 08:09 PM type2man Yep, try not to push the pedal all the way down, b... Mar 19 2009, 08:15 PM mikez Bleed, bleed, bleed....then sometimes you wait a d... Mar 19 2009, 08:48 PM 6freak I prefer the two man way....
REALLY so the truth ... Oct 21 2009, 03:33 PM underthetire Believe it or not, you can actually open all the b... Mar 19 2009, 09:34 PM echocanyons Are the bleeders up? Mar 19 2009, 09:57 PM Dave_Darling Bleed the rear brakes first. You'd be amazed ... Mar 19 2009, 10:22 PM Sleepin Looks like that might be what I have to try.
I j... Mar 20 2009, 01:23 AM roadster fan I have used the Motive power bleeder with good suc... Mar 20 2009, 01:33 AM ThinAir
I would definitely bleed the MC before starting t... Mar 20 2009, 07:34 AM davesprinkle
I would definitely bleed the MC before starting ... Mar 20 2009, 09:16 AM SLITS Ernie .... crack the fittings at the MC and let it... Mar 20 2009, 09:12 AM 6freak [ This fills the MC if somehow you ran it out of ... Mar 20 2009, 11:24 AM ThinAir Well, things have not gone well. Here's what ... Mar 20 2009, 07:41 PM Cire
Well, things have not gone well. Here's what... Oct 16 2009, 10:21 PM Heeltoe914 Just replace it and consider it a upgrade? But d... Mar 20 2009, 08:12 PM McMark I've definitely had MC seals suddenly fail. I... Mar 21 2009, 08:03 PM Vacca Rabite Couple things to check.
1) when you are bleeding,... Oct 18 2009, 12:08 AM 9146986 Did you install the calipers on the wrong sides? ... Oct 18 2009, 08:46 AM tod914 Maybe jack up the passanger rear, tap the caliper ... Oct 18 2009, 08:55 AM SLITS I vaguely remember a parallel story where the cali... Oct 18 2009, 09:17 AM pcar9146guy This thread started in March of this year.....Hope... Oct 18 2009, 02:40 PM Sleepin Yes, this has been corrected and are working wonde... Oct 18 2009, 04:14 PM Krank The first thing I always do when doing hydraulic b... Oct 23 2009, 07:38 PM |
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