94 Rear drum leaking - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 08-27-2006, 02:22 PM   #1
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Default 94 Rear drum leaking

How would I go about fixing a drum thats leaking brake fluid. I know its the passenger side drum. It leaks fluid the brake light on the dash will come on pour some fluid in there and its fine for about 700 miles. Is it just the wheel cylinder or what and how hard is it.
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Old 08-27-2006, 03:12 PM   #2
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Maybe a dumb question, but have you taken the drum off? I would guess it'* the cylinder inside if it'* coming from inside the drum. Hopefully it'* not the line near the drum because that can be a pain.
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Old 08-27-2006, 03:41 PM   #3
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Replace both rear wheel cylinders and bleed. Not a bad time for a full brake job.
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Old 08-27-2006, 03:56 PM   #4
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Also what is the correct size and tool do I need to take the front calipers off.
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Old 08-27-2006, 04:19 PM   #5
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You need a big Allen wrench or Allen socket for the two bolts on the inside of each caliper. Does T55 sound right, anyone? Or is that a Torx size?
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Old 08-27-2006, 04:34 PM   #6
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Quote:
Originally Posted by big_news_1
You need a big Allen wrench or Allen socket for the two bolts on the inside of each caliper. Does T55 sound right, anyone? Or is that a Torx size?
For the front Calipers on a 94 it should be a 3/8 hex( allen )

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Old 08-27-2006, 06:01 PM   #7
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I knew it was a huge allen but I didn't have any big enough to fit it and I hate buying the sets of tools without knowing what the actual size is.

P.*. - I have to leave town in a couple hours for the rest of the week so looks like another week before I will have to fix her up.
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Old 08-27-2006, 06:19 PM   #8
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How bad is the wheel cylinder leaking? Is it a leak that leaves brake fluid on the ground? Or just the Wheel cylinder wet, as in a small seep?

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Old 08-27-2006, 06:20 PM   #9
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I don't notice puddles on the ground but on the rim itself on the inside you can see some wetness.
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Old 08-28-2006, 02:57 AM   #10
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If you're leaking enough fluid that it'* soaking the inside of the rim, chances are good that the shoes are saturated with fluid. If that'* the case, you need to replace the shoes when you replace the wheel cylinders, and clean out ALL the brake fluid on the inside of the drum. The shoes will absorb the brake fluid and they'll swell, causing you all sorts of problems.
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