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Maintenance, Mods, & Tips Mods | Tips | Repairs & Troubleshooting |
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03-07-2007, 05:30 PM
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#1
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Senior Member
Join Date: Nov 2006
Location: Auburndale, FL
Posts: 2,391
Name :
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Brake issues, back here again
Found the mis-behavin plug wire and got that corrected so, of course, off for a ride......
Well let me start this at the beginning. A few weeks ago when I was doing numerous small things to the vette I took some slack out of the emergency brake cable. Drove her and felt like the rear brakes were dragging particulary as I drove on. Came home with slightly smoky rear brakes and backed off the emergency brake cable thinking I had taken a bit too much slack up.
Today following the plug wire correction I took her out for a drive again. Same thing. Seems to feel like it comes a little more from L rear but both L and R heat up too much. I'm thinking it's the old "I need SS sleeved rear calipers" gig.
Pads all around are new condition and the smell, I believe, was brake as opposed to other common smells but before I invest in two new SS sleeved calipers I'd like some input.
Thanks,
Ken
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Quietly, quietly, quietly making noise.
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03-07-2007, 09:02 PM
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#2
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Car Show DJ
Join Date: Nov 2006
Location: Palm Bay, FL
Posts: 1,199
Name :
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Are you sure that the E-Brake cable is releasing completely?
I had a truck that didn't and I had the same scenario.
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Steve Kinnaird
Palm Bay, Florida
Car Show DJ since 1992
Charter Member #64
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03-07-2007, 09:06 PM
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#3
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Senior Member
Join Date: Nov 2006
Location: Auburndale, FL
Posts: 2,391
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No I'm not sure
What diagnostic steps can I take to make that determination?
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03-07-2007, 09:31 PM
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#4
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Car Show DJ
Join Date: Nov 2006
Location: Palm Bay, FL
Posts: 1,199
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I found this out when I replace very badly worn out brake shoes. The drum would not go back on. The cable was rusted just enough that it kept the E-Brake mechanism engaged.
Do you have disk or drum on the rear?
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Steve Kinnaird
Palm Bay, Florida
Car Show DJ since 1992
Charter Member #64
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03-07-2007, 09:45 PM
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#5
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Senior Member
Join Date: Nov 2006
Location: Auburndale, FL
Posts: 2,391
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Just went out....
And backed off the adjustment nut and made sure the cables were loose.
What you say makes sense. Before I adjusted the cable I had taken the car on two runs of maybe 130 and 150 miles without any problem. After adjustment, problems.
Logically both calipers should not mal-function at the same time with or without Murphy's involvement.
I'll take her back out tomorrow evening and see how she acts.
Thanks bro,
Ken
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03-07-2007, 09:45 PM
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#6
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Senior Member
Join Date: Nov 2006
Location: Auburndale, FL
Posts: 2,391
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OOPS
all disc's
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03-07-2007, 09:56 PM
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#7
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Car Show DJ
Join Date: Nov 2006
Location: Palm Bay, FL
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Good luck!
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Steve Kinnaird
Palm Bay, Florida
Car Show DJ since 1992
Charter Member #64
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03-08-2007, 07:18 AM
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#8
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Wassup!!!
Join Date: Oct 2006
Location: Weirsdale Florida (Lady Lake area)
Posts: 3,001
Name :
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Me...
I'd block the front wheels, lift up the rear end and spin the rear tires, listening for any type of Dragging. if that didn't convince me... I'd start the car up, put'er in gear and have momma steppin' on the accelerator while i'm behind the car looking at the rear end with a flash light (if need be) looking for smoke etc.
~Ray
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I bro...
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03-08-2007, 08:32 AM
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#9
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Senior Member
Join Date: Nov 2006
Location: Auburndale, FL
Posts: 2,391
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Good solid diagnostic approach, I like it doctor. I just can't believe that both rear calipers would begin binding without me being the cause I'll work on that Saturday, runnin kinda hard till then.
Thanks, I appreciate it.
Ken
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03-08-2007, 03:07 PM
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#10
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Delta House Member
Join Date: Jun 2006
Location: toronto
Posts: 371
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I attached a picture of how the emergancy brake system is comprised on your car from the GM parts catalog. As you can see you have two little brake shoes that fit inside the rotor hub. The hub acts like a brake drum. More than likely when you adjusted the cables the shoes moved tightly against the drum. Now this type of emergency brake system is famous for the shoes freezing in place and the backing plate and springs and hardware getting rusty, thats why most people don't use the emergency brake because they freeze. Now if the shoes are expanded you might have a problem getting the rotor off because the little brake drum usually forms a ridge on the edge and when the shoes are expanded it can become quite a pain to get the rotor off. If memory serves me correct there is a special tool to get at the adjuster to adjust the shoes. Heat is the biggest enemy of any brake system. If you heated up the little drums enough to smoke there is a possibility that the hubs got real hot and damaged either the shoes the rotors or both. You can jack the car up and try to spin the wheels by hand and see if they are dragging. I would seriously doubt you need new calipers, however SS sleeved calipers are the way to go, but remember you will need to turn your old calipers in for cores so they must be rebuildable, they are very valuable. I'd change all 4 if your going to do it and convert to DOT 5 silicone brake fluid, but thats just me. Muskeegon Brake has great deals on r/b calipers if you buy a set of 4, lifetime guarentee if I remember and free pads. Just my .02
While your in there you and have the car jacked up you might want to check your rear wheel bearings for play. It would be a shame if they heated up and snapped off the spindle and the wheel went thru the quarter panel.
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