No brakes or brake pressure?

Tiny
SANDSTORM1958
  • MEMBER
  • 1998 CHRYSLER TOWN AND COUNTRY
  • 3.8L
  • 2WD
  • AUTOMATIC
  • 133,000 MILES
Title says it all. Roomie's car, a disability conversion van, not professionally done. Took a while to figure out where they moved the ABS Control Module and Pump but managed to locate it. We tested for line leaks everywhere and I saw not one drop from all the peddle pumping. So, I went up top and checked the master cylinder for leaks, didn't see any other than the reservoir seam had a leak if slightly over-filled.

I'm assuming that since we have no brake pressure, the ABS Light hasn't indicated a problem, and no line leaks thus far I'm looking at a failed master cylinder. That sound right? I say this because over the last few months it's been gradual then all of a sudden, the other day she couldn't stop and slammed the car into the gate leading to the house, only damage I found was a torn apart steering rack boot on the passenger side which is a simple fix. Just wanted the thoughts of pro mechanics who deal with brake issues all the time. I'm not a pro mechanic but in the upper level of DIY home mechanics so I hold my own. I have several books of those 3rd Generation Chrysler Mini Vans, so I know how to remove the master cylinder. Isn't there a seal at the back of it that must be changed when replacing the one in the vehicle?
Sunday, April 2nd, 2023 AT 3:31 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,700 POSTS
Hi,

If there are no leaks, the master cylinder is the first suspect. Take a look through this link and see if it helps you:

https://www.2carpros.com/articles/brake-pedal-goes-to-the-floor

As far as replacing it, make sure to bench-bleed the new one before connecting it to the system.

Let me know if this helps.

Take care,

Joe

See pics below.
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Sunday, April 2nd, 2023 AT 10:05 PM

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