Spongy breaks
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Topic author - Retired
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Spongy breaks
Ive replaced the breaklines on TW. I bled them out but after sitting overnite they get spongy pump them 3 or 4 times they are good to go any ideas what it could be other than air in the lines. how can I get rid of this problem?
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Re: Spongy breaks
Do you have ABS? If so, I have read in various posts that an ABS brake system is very difficult to bleed properly. I am not sure how to bleed them, but I'm sure someone will be able to say or you might find it by searching old posts.
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1997 GMC Safari RWD, Power Windows and Locks, 7 passenger, a/c, rear heat
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1997 GMC Safari RWD, Power Windows and Locks, 7 passenger, a/c, rear heat
http://rileysowner.blogspot.com/
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Re: Spongy breaks
I didn't see what year your van is and there is a difference. Air won't compress thus the spongy peddle. Try starting the engine every bleed, that cycles the ABS pump. Then again an 85 won't have ABS so my reply would be to start at the Master and open every fitting and bleed like normal. Some times the rear hose is clogged and the fluid is slow to the rears. If it's an old van with high miles I'd replace all hoses.
98 Astro with a 95 LT1
94 Astro stock w/Flo master.
94 Astro stock w/Flo master.
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Re: Spongy breaks
I had a problem with air in the lines. Couldn't get it out no matter what I tried. I built a pressure bleeder out of a garden sprayer and that thing blew the air out right now. ![Dancing \:D/](./images/smilies/eusa_dance.gif)
![Dancing \:D/](./images/smilies/eusa_dance.gif)
1996 Safari SLX Hotair balloon transport vehicle
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Topic author - Retired
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Re: Spongy breaks
its an 87 with no ABS. hoses are newer....
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Re: Spongy breaks
It sounds like you may have to check for a tiny leak somewhere. Check over the flares for sure. Had this happen last time I did the hard lines... One of the flairs was leaking a tiny tiny bit creating that spongy feeling.
Also sometimes I've found that a tad bit of air gets stuck mid line and you have to put a butt load of fluid through the right rear bleed screw via pumping and opening to get it out.
Also sometimes I've found that a tad bit of air gets stuck mid line and you have to put a butt load of fluid through the right rear bleed screw via pumping and opening to get it out.
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Re: Spongy breaks
I always use a pressure bleeder at my work, because we flush out old brake fluid and replace it with new it makes the brake pedal firmer. As Smiley said build yourself a pressure brake bleeder from an insecticide pressure sprayer.
Do a search here or at AstroSafari archives for my indepth write up.
Do a search here or at AstroSafari archives for my indepth write up.
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A British Wanker living in So KarlyFornia.
My Astro tows my toys to Glamis sand dunes http://www.youtube.com/watch?v=jp2pqjQtpso
First ever canal jump at Glamis http://www.youtube.com/watch?v=oXZjM84x_Xc
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Re: Spongy breaks
Once you use the pressure bleeder you wont go back to the old pump, pump, pump, way of bleeding the system. Total investment in my garden sprayer pressure bleeder is about $20.00. ![Dancing \:D/](./images/smilies/eusa_dance.gif)
![Dancing \:D/](./images/smilies/eusa_dance.gif)
1996 Safari SLX Hotair balloon transport vehicle
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Re: Spongy breaks
I agree there is either air in the lines or a tiny leak at a fitting.
We NEED a write-up on the pressure bleeder! I know I have seen Darren's build before but a write-up for the tech articles would be AWESOME!!!!![Rock on! :supz:](./images/smilies/icon_super.gif)
We NEED a write-up on the pressure bleeder! I know I have seen Darren's build before but a write-up for the tech articles would be AWESOME!!!!
![Rock on! :supz:](./images/smilies/icon_super.gif)
Current rides:
2013 Toyota Tundra DC 4x4
2008 Dodge Nitro 4x4
2005 Nissan Sentra 1.8S Special Edition
Mileage spreadsheet
Vans owned:
1986 Safari 2.5L 4 speed manual - scrapped
1995 Astro 2WD conversion 4.11 posi, shift kit, DHC rock rails - sold to Skippy
1998 Astro 4x4 D44, D60, NP231, full hydraulic system with 9k# Milemarker winch and snow plow - sold to Lockdoc
2003 Astro AWD all stock - traded for a 3/4 ton truck
2005 AWD, 4.10's - sold to skippy
2013 Toyota Tundra DC 4x4
2008 Dodge Nitro 4x4
2005 Nissan Sentra 1.8S Special Edition
Mileage spreadsheet
Vans owned:
1986 Safari 2.5L 4 speed manual - scrapped
1995 Astro 2WD conversion 4.11 posi, shift kit, DHC rock rails - sold to Skippy
1998 Astro 4x4 D44, D60, NP231, full hydraulic system with 9k# Milemarker winch and snow plow - sold to Lockdoc
2003 Astro AWD all stock - traded for a 3/4 ton truck
2005 AWD, 4.10's - sold to skippy