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1995 Oldsmobile Cutlass with seized rear brake piston


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Neti
User

Jun 28, 2013, 7:09 PM

Post #1 of 3 (1810 views)
1995 Oldsmobile Cutlass with seized rear brake piston Sign In

Hello. I have an Oldsmobile cutlass 1995 with a seized piston in the rear passenger side brake. If you push the wheel while it's off the ground , the wheel is incredibly hard to push on some spots in the revolution(the wheel will not rotate freely).

This is reflected as when I brake hard , the peddle begins to vibrate , and you hear a sound as if the pads are not uniformly worn , a sort of "whooshing" sound. Braking power is also not very good.

I assume the front wheel brake pads are worn(will check very soon) , but the right rear brake has something definitely off about it.Brake fluid is fine.

Any suggestions on how to unbind the seized piston?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 28, 2013, 7:15 PM

Post #2 of 3 (1808 views)
Re: 1995 Oldsmobile Cutlass with seized rear brake piston Sign In

You don't "unseize" a frozen caliper, you replace both calipers but you are a bit premature assuming the caliper is actually the problem. Could be the slides frozen or a bad flex hose.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jun 29, 2013, 6:04 AM

Post #3 of 3 (1774 views)
Re: 1995 Oldsmobile Cutlass with seized rear brake piston Sign In

As HT said fix all that's wrong in pairs. If rear discs the parking cables can stick, slide pins, or doubt the type but some use a mini drum brake inside rotor out of sight and those get so full of junk you can need to clean them out now and then.

Anyway the rear brakes are done in this it all must be right, calipers, hoses, hardware, parking brake cables drums and rotors as the heat has probably wrecked the stuck one already. I'm not or no longer a fan of machining them as they are just off spec for new parts and thinner so warp much quicker than new ones frequently not that much more than machining them. Just know that cutting any corners is first less safe and can easily put you back to needing the whole job again too,

T







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