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Old 11-13-2017, 03:54 PM   #1
mossymemedogg
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Default Brake Troubles

Hello,
I recently bought a '90 240 DL and the brakes felt fine, fast forward about 3 months we got a bit of cold weather and now the brake pedal is spongy and travels a lot more than normal. The car still stops and the pedal seems to stop at the same place each time (there isn't "creep' once the pedal is depressed and the car is stopped), any ideas what the issue could be? and how to fix it/ how much $ to have it fixed.
Thanks!
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Old 11-13-2017, 04:12 PM   #2
speedn_j
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Sounds like master cylinder. It'll eventually get worst. You could fix it as cheap as 20 dollars or it you want Volvo parts then it'll be about 100. Easy 30 minute job then bleed the calipers
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Old 11-13-2017, 05:05 PM   #3
Redwood Chair
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Booster hold vacuum?
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Old 11-13-2017, 10:48 PM   #4
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Quote:
Originally Posted by Redwood Chair View Post
Booster hold vacuum?
If it were the booster wouldn't the pedal be rock hard?

Last edited by speedn_j; 11-14-2017 at 12:52 AM..
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Old 11-13-2017, 11:20 PM   #5
Redwood Chair
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Quote:
Originally Posted by speedn_j View Post
I'd if was the booster wouldn't the pedal be rock hard?
No the seal gets wet with brake fluid and fails slowly, but it won't hold static vacuum.
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Old 11-14-2017, 11:27 AM   #6
mossymemedogg
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Thanks for the replies. I'm not sure how to check the booster for vacuum, but looking at the junction block behind the drivers side font wheel, it appears to be leaking from somewhere. I am not sure if the block itself is compromised or one of the lines has a leak, is this a common problem? the junction block is directly exposed to whatever is on the road and it seems like it could pretty easily get corroded.
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Old 11-14-2017, 11:41 AM   #7
Redwood Chair
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Carefully pull the white one way valve on the booster with the ~5/8" vacuum hose after it's been sitting for a couple hours.

Yes it's a common problem, typically they leak by the warning light sensor switch.
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Old 11-14-2017, 12:36 PM   #8
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Brake fluid leaks at the distribution block can be loose or failed brake lines, but that is rare.

The usual problem is 1 or both of the o-rings on the piston assemblies inside the distribution block are bad.

The seal for the electrical contact does not hold brake fluid pressure. If there is brake fluid in the port for the switch its because a piston o-ring(s) have failed.



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