Brake experts....I need your help please....
Thread Starter
Safety Car
Joined: Feb 2006
Posts: 4,789
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Brake experts....I need your help please....
When I bought my '88 coupe, the brakes were in terrible shape from years of neglect from the previous owner. But with a few hours of research here on the forum, I'm almost there. Here's what I have done so far.
1. New calipers on the front
2. Turned front rotors
3. New brake hoses
4. New rotors and pads on the rear
5. Fully (and I mean fully) flushed and bled the entire system until clear.
6. Cleaned all ABS sensors with WD-40 and repaired a broken wire on the right front.
(no more ABS light coming on after takeoff...and I do hear the pump run a couple seconds after takeoff)
7. Replaced the beveled spindle washers on the rear and used anti-seize on the spline shafts.....NO MORE CLICKING
The only problem I have left is a continued sticking brake on the right front. I thought I had it resolved when I did the new calipers, hoses and turned the rotors...but NOT. The brakes feel great....but that front right is sticking again and heating up pretty good. I've researched everything I can here and I'm still just stumped.
1. New calipers on the front
2. Turned front rotors
3. New brake hoses
4. New rotors and pads on the rear
5. Fully (and I mean fully) flushed and bled the entire system until clear.
6. Cleaned all ABS sensors with WD-40 and repaired a broken wire on the right front.
(no more ABS light coming on after takeoff...and I do hear the pump run a couple seconds after takeoff)
7. Replaced the beveled spindle washers on the rear and used anti-seize on the spline shafts.....NO MORE CLICKING
The only problem I have left is a continued sticking brake on the right front. I thought I had it resolved when I did the new calipers, hoses and turned the rotors...but NOT. The brakes feel great....but that front right is sticking again and heating up pretty good. I've researched everything I can here and I'm still just stumped.
Team Owner
Joined: May 2002
Posts: 24,337
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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Were the caliper pins replaced? Is it floating freely?
Did you check the booster pushrod adjustment?
It's normal for it to drag somewhat when spinning it by hand, but it should be enough to cause any significant heat when driving.
Did you check the booster pushrod adjustment?
It's normal for it to drag somewhat when spinning it by hand, but it should be enough to cause any significant heat when driving.
Thread Starter
Safety Car
Joined: Feb 2006
Posts: 4,789
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I bought "loaded" calipers that came with the pads, mounting brackets and pins already installed. To re-check the caliper, I just loosened the hose at the caliper....the caliper immediately released and the rotor turns free.
Last edited by FLA-C3; Jul 11, 2007 at 09:15 AM. Reason: Update....
Thread Starter
Safety Car
Joined: Feb 2006
Posts: 4,789
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An update:
I definitely have a restriction on the right side somewhere. That side still won't "gravity" bleed. So, I loosened the hard line fittings at the brake hose and ABS pump...attached a rubber hose and funnel at the pump end of the line to get it higher. When I poured brake fluid in, it drained down to the caliper end just like the other side does. I guess I have a blockage in the ABS pump. Is there anything else I should check before replacing the pump? I guess the pump is not serviceable?
I definitely have a restriction on the right side somewhere. That side still won't "gravity" bleed. So, I loosened the hard line fittings at the brake hose and ABS pump...attached a rubber hose and funnel at the pump end of the line to get it higher. When I poured brake fluid in, it drained down to the caliper end just like the other side does. I guess I have a blockage in the ABS pump. Is there anything else I should check before replacing the pump? I guess the pump is not serviceable?
Pro
Joined: Apr 2005
Posts: 590
Likes: 0
From: Boynton Beach, FL
An update:
I definitely have a restriction on the right side somewhere. That side still won't "gravity" bleed. So, I loosened the hard line fittings at the brake hose and ABS pump...attached a rubber hose and funnel at the pump end of the line to get it higher. When I poured brake fluid in, it drained down to the caliper end just like the other side does. I guess I have a blockage in the ABS pump. Is there anything else I should check before replacing the pump? I guess the pump is not serviceable?
I definitely have a restriction on the right side somewhere. That side still won't "gravity" bleed. So, I loosened the hard line fittings at the brake hose and ABS pump...attached a rubber hose and funnel at the pump end of the line to get it higher. When I poured brake fluid in, it drained down to the caliper end just like the other side does. I guess I have a blockage in the ABS pump. Is there anything else I should check before replacing the pump? I guess the pump is not serviceable?
It sounds like the line is the issue but have you checked that the right side caliper bracket you got isn't bent. A bent bracket would cause pad drag. Good luck.
Larry
Thread Starter
Safety Car
Joined: Feb 2006
Posts: 4,789
Likes: 7
Found the problem.....
Thanks Vetracr, I found the problem.....the valve for the right front line in the ABS hydraulic unit is stuck in the closed position. I removed the assy from the car and was able to blow compressed air freely through all of the ports except the right front....blocked solid.
Anyone know a "reasonable" place to get the ABS pump? Napa wants over $700...
Anyone know a "reasonable" place to get the ABS pump? Napa wants over $700...
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Pro
Joined: Apr 2005
Posts: 590
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From: Boynton Beach, FL
Thanks Vetracr, I found the problem.....the valve for the right front line in the ABS hydraulic unit is stuck in the closed position. I removed the assy from the car and was able to blow compressed air freely through all of the ports except the right front....blocked solid.
Anyone know a "reasonable" place to get the ABS pump? Napa wants over $700...
Anyone know a "reasonable" place to get the ABS pump? Napa wants over $700...
Larry
P.S. Try E-bay for the ABS unit. I see them there often.
Team Owner
Joined: Oct 2000
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From: Fort Knox, KY
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Thread Starter
Safety Car
Joined: Feb 2006
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[QUOTE=Vetracr;1561042399]I'm surprised the ABS self check didn't set the ABS light after the self test. According to the manual the test cycles the valves and sets the ABS light if any of the valves malfunction.
Yeah Larry, I'm very surprised too. What use is the self check if it misses something like a sticking valve? LOL
Anyway, I snagged one off of Fleebay...thanks again.
Dewain
Yeah Larry, I'm very surprised too. What use is the self check if it misses something like a sticking valve? LOL
Anyway, I snagged one off of Fleebay...thanks again.
Dewain
