Crap...what is making this sound... - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 06-02-2006, 12:00 AM   #11
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If you've never done rear drums on a Bonneville before, get help from someone who'* done at least SOME rear drum work. The right tools and experience will make this go alot easier. return springs are easy. But there'* another BIG spring in there that is waiting to pounce on you and make you look like an idiot.
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Old 06-02-2006, 12:54 AM   #12
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Like nails down a blackboard
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Old 06-02-2006, 09:05 PM   #13
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I had to fork out the money to get this one done. I work the next 12 days and go to school w/exams. And I know nothing about drum brakes.

Anyhoo, it cost me $230 CDN. It could have been worse I guess. They replaced the passenger side adjuster kit (which is apparently what caused this), spring kit, shoes and drum. Took an extra long time because they ordered parts for my '89 because it was still in the computer. I guess he didn't look at the car first...
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Old 06-02-2006, 10:41 PM   #14
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In hindsight, it would have been best to do both sides at the same time.
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Old 06-03-2006, 01:13 AM   #15
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Quote:
Originally Posted by captainmiller
I had to fork out the money to get this one done. I work the next 12 days and go to school w/exams. And I know nothing about drum brakes.

Anyhoo, it cost me $230 CDN. It could have been worse I guess. They replaced the passenger side adjuster kit (which is apparently what caused this), spring kit, shoes and drum. Took an extra long time because they ordered parts for my '89 because it was still in the computer. I guess he didn't look at the car first...
Hoo hah!
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Old 06-03-2006, 02:40 AM   #16
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Good to hear you got it taken care of.
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Old 06-03-2006, 02:51 AM   #17
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Quote:
Originally Posted by willwren
In hindsight, it would have been best to do both sides at the same time.
I asked about that, he said they inspected the other side and it looked fine. I hope I don't have to deal with it any time soon. BTW, what is the adjuster kit and what does it do?
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Old 06-03-2006, 11:26 AM   #18
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Quote:
Originally Posted by captainmiller
I asked about that, he said they inspected the other side and it looked fine. I hope I don't have to deal with it any time soon. BTW, what is the adjuster kit and what does it do?
Cool, glad you got it solved. Drums suck to work on, but they aren't really bad to work on. If you ever decide to do them, take pictures of the mechanism and keep the driver & passenger side parts seperate (there are parts that are reversed depending on the side you are looking at.)

The adjusters are like little turn-buckles. As the brake shoes wear down, they unscrew and get longer to close the gap between the shoe surface and the drum. Without them, the drum brakes would become very spongy over time...since you would need a lot of movement before the shoes touch the drum surface.

Hmm.. the way it works: The shoes have to be spread apart to apply pressure to the inside of the drum. Hydrualic pistons do this when you press the brake pedal. A mechanical lever does it if you apply the parking brake. To get the brakes to release, big springs pull the shoes away from the drum surface. A little pawl and ratchet deal on the adjuster unscrews it (making it longer) and forces the shoes as close to the drum surface as possible to make up for wear. The automatic adjuster is actually a pretty cool gizmo. I have a Honda motorcycle that I have to adjust the drum brake on manually.

As a part of routine maintenance, I pull the drums off and blow out the brake dust so I can see the condition of the parts as well as the shoes. I also occasionally apply the parking brake and release it to make sure the cables haven't rusted in place, which happens a lot since few people ever use the parking brake on automatic transmission cars. Not as powerfull or as easy to work on as disk brakes, but still a pretty good design all the way around.
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