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Old 08-14-2002, 09:44 AM
190D22's Avatar
Driver's Side lights
 
Join Date: Apr 2002
Location: Columbus, Ohio
Posts: 876
Brake Problem

I've noticed w/ my car lately that if I run it for a while (30 min at least) that the brakes will feel like they've lost power. If I go start it up right now today for the first time, it will brake perfectly. But if I run it for a while the pedal will go down almost to the floor w/ little to no effort and then I have to push kinda hard to brake. It feels exactly like the car does when I put it in neutral and roll it down the driveway... well not exactly but very close. If I pump the pedal a few times it gets full power, w/ each successive pump pedal gets higher and higher. Then the next time I brake it will go all the way to the floor. I am betting master cylinder or the vacuum servo that's connected to the master cylinder. Any help please?

Thanks in advance. Oh yeah I do have fairly new brake pads (changed about 6 months ago) in the front and was told the back pads were fine and I wouldn't need to change them until I change the front ones two times.

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1984 190D 2.2 Auto 220k
2001 Jeep Cherokee Sport 70K
2004 Lexus RX-330 ??K
2005 Chrylser Crossfire LTD 6K

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Old 08-14-2002, 09:58 AM
j shepardson
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when you pump the pedal does it start getting really solid?

If so more than likely you've just got some air in your lines and could use a bleed job.
with my experence with master cylinders once they go its the same problem constently not sometimes here or there.
I would think your safe, also you might want to check the brake lines where they go into the caliper "rubber hoses" for cracks also wetness on the hose or on the caliper

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Old 08-14-2002, 10:24 AM
190D22's Avatar
Driver's Side lights
 
Join Date: Apr 2002
Location: Columbus, Ohio
Posts: 876
Well discussing this w/ my old man on the phone just now, it occured to me that maybe it's condensation in the lines. Because since it only happens after the car's been running a while (therefore everything is nice and hot) that the fluid may start boiling.

Yes the pedal gets harder when I pump it. Is bleeding the brake lines difficult?

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1984 190D 2.2 Auto 220k
2001 Jeep Cherokee Sport 70K
2004 Lexus RX-330 ??K
2005 Chrylser Crossfire LTD 6K

Play guitar? Go to www.cyberfret.com for free online lessons!
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