another cracked brake booster!

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Apr 12, 2009 | 03:00 PM

motodog

Thread Starter

Racer

Joined: Feb 2009

Posts: 261

Likes: 1

From: Riverside CA

another cracked brake booster!

i have replaced at least 5 brake boosters in this car, any reason why?

Apr 12, 2009 | 03:02 PM

Demonic85

Team Owner

Joined: Feb 2006

Posts: 24,460

Likes: 7

From: sw Ohio

What kind of replacements have you been using?

Apr 12, 2009 | 03:19 PM

runner140*

Le Mans Master

Joined: Mar 2004

Posts: 8,700

Likes: 298

From: Ft. Lauderdale Fl

Quality of replacement? I'm on my origional at over 160,000 miles.
Think about getting a tin one.

Apr 12, 2009 | 03:22 PM

Demonic85

Team Owner

Joined: Feb 2006

Posts: 24,460

Likes: 7

From: sw Ohio

my original is failing at 120K, not sure if i'll get around to replacing it anytime soon though.

Apr 12, 2009 | 03:26 PM

JackDidley

Race Director

Joined: Sep 2003

Posts: 16,838

Likes: 341

From: Database Error Indiana

If you are running uncoated headers, the heat will kill the plastic. A lot of guys use a metal aftermarket booster.

Apr 12, 2009 | 03:29 PM

motodog

Thread Starter

Racer

Joined: Feb 2009

Posts: 261

Likes: 1

From: Riverside CA

no headers, its an autozone. that much of a dif on that thing

Apr 13, 2009 | 12:31 PM

Randy93

Melting Slicks

Joined: Feb 2005

Posts: 2,135

Likes: 0

From: Sebastian Florida

St. Jude Donor '06

I have had an autozone for 4 yrs w/no trouble, is it cracking in the same spot?
You might have a missing heatshield.

Apr 13, 2009 | 02:30 PM

89Corvette6spdFX3

Safety Car

Joined: Jul 2003

Posts: 4,928

Likes: 1

Don't lean on your master cylinder either. (Common sense but sometimes may be uncommon.)

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Apr 13, 2009 | 06:15 PM

pologreen1

Team Owner

Joined: Dec 2007

Posts: 20,974

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dang that sucks

Apr 14, 2009 | 12:31 AM

#10

Curveit

Drifting

Joined: Feb 2003

Posts: 1,978

Likes: 2

From: San Antonio Texas

I was told...if your Master Cylinder is leaking Brake Fluid from the Rear Seal; behind the mount, it can enter the Booster and that causes it to crack. I just recently did both on my '86... Booster first, as it had cracked.

Apr 14, 2009 | 11:19 AM

#11

65747785

Pro

Joined: Feb 2009

Posts: 589

Likes: 1

From: PA

That's weird I never heard or read in books this happening. Some people switch to the metal ones as mentioned about.

We're all curious, where are they cracking? And how long does it take before they crack? There has to be a logical answer to this. What's AutoZone have to say about this?

Apr 14, 2009 | 03:24 PM

#12

Lichen

Melting Slicks

Joined: Nov 2002

Posts: 2,471

Likes: 2

From: 1993 Quasar Blue 'vert Scottsdale AZ

Autozone sells the crappy Cardone brand. I went through 2 in a year. Do yourself a favor, spend an extra $100 and order a PBR through Ecklers.

Apr 14, 2009 | 05:44 PM

#13

Targa86

Instructor

Joined: Apr 2009

Posts: 164

Likes: 1

From: Modesto California

Very common. I had the same problem, heat is the culprit. Either put some epoxy over the crack and deal with the eyesore or get an aftermarket metal booster(not much more $ than the plastic one).