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04-14-2010, 09:56 AM
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#1 |
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Registered User
Join Date: Sep 2008
Location: Middleton, Idaho
Posts: 352
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Front disc brakes smoking- '85 K3500
I just bought an 85 GMC K3500 4x4 that had all brake work recently done by the previous owner...new master and wheel cyl, rotors, calipers ect.
So I am noticing a brake lining burning smell everytime I drive it and a bit of smoke coming off the front wheels. Jacked it up and front tires only turn 1/2 revolution. I looked for an adjustment rod at the pedal but there is none. Pedal travel is pretty short. It does not have the big round brake booster. It has the heavy duty cast iron booster. Thanks, dyno
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"Built- not bought" 1958 GMC 150 4x4 in progress 1980 K20- Restored 1985 K3500 Flatbed 58 GMC 4x4 build thread: http://http://67-72chevytrucks.com/vboard/showthread.php?t=557675 |
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04-14-2010, 12:24 PM
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#2 |
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Registered User
Join Date: Mar 2007
Location: Farmington, MN
Posts: 928
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Re: Front disc brakes smoking- '85 K3500
Were the brake hoses replaced? They can collapse and not allow the brake fluid to return to the master cylinder when the peddle is released.
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I can still count my vehicles on two... wait three hands. |
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04-14-2010, 09:16 PM
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#3 |
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Registered User
Join Date: Sep 2008
Location: Middleton, Idaho
Posts: 352
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Re: Front disc brakes smoking- '85 K3500
No, I think they are original. But this happened after the shop did all the work.
__________________
"Built- not bought" 1958 GMC 150 4x4 in progress 1980 K20- Restored 1985 K3500 Flatbed 58 GMC 4x4 build thread: http://http://67-72chevytrucks.com/vboard/showthread.php?t=557675 |
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04-14-2010, 10:16 PM
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#4 |
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Robert Olson Transport
 
Join Date: Oct 2002
Location: recent transplant to NC USA
Posts: 20,307
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Re: Front disc brakes smoking- '85 K3500
it is possible if the rotors were replaced and the brake pads are those semi metallic ones that the brakes have to wear in but it shouldnt take more than a day or so for that to happen. jack up the fronts and make sure the wheels spin freely after applying and releasing the brake pedal and as long as they do give it a day or so it just may be wearing in.
__________________
Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!! |
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04-14-2010, 10:33 PM
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#5 |
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Registered User
Join Date: Jul 2009
Location: West Jefferson, OH
Posts: 999
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Re: Front disc brakes smoking- '85 K3500
Short pedal travel is normal for hydroboost brakes. Does it drive normal other than the smoke? Maybe they replaced the rotors and did not clean the goo off of them.
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04-14-2010, 11:43 PM
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#6 |
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Registered User
Join Date: Sep 2008
Location: Middleton, Idaho
Posts: 352
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Re: Front disc brakes smoking- '85 K3500
Yeah, it drives normal but feels like it's dragging. put it in nuetral and it does not freely coast so I know it's those front brakes. I will give it some time to see if it clears up. Thanks for your input.
__________________
"Built- not bought" 1958 GMC 150 4x4 in progress 1980 K20- Restored 1985 K3500 Flatbed 58 GMC 4x4 build thread: http://http://67-72chevytrucks.com/vboard/showthread.php?t=557675 |
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04-15-2010, 08:16 AM
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#7 |
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dang its hot
Join Date: Nov 2006
Location: frankfort kentucky
Posts: 1,349
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Re: Front disc brakes smoking- '85 K3500
put new hoses on it
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04-15-2010, 09:18 AM
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#8 |
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Robert Olson Transport
Join Date: Oct 2002
Location: recent transplant to NC USA
Posts: 20,307
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Re: Front disc brakes smoking- '85 K3500
if its dragging then the hoses first thing
__________________
Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!! |
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04-15-2010, 09:39 PM
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#9 |
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Registered User
Join Date: Jul 2009
Location: West Jefferson, OH
Posts: 999
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Re: Front disc brakes smoking- '85 K3500
Agreed, replace the hoses.
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04-15-2010, 11:12 PM
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#10 |
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BMW & ASE Master Certified
Join Date: Feb 2004
Location: Houston, Texas
Posts: 1,266
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Re: Front disc brakes smoking- '85 K3500
remove the caliper, its only 2 bolts, then try and spin the rotor... maybe they put preload on the bearings... if so thats not good because its not supposed to have pre load.. it will kill the bearings.. if it spins fine, since the caliper is removed, mine as well replace the hose.. its what.. 10 bucks a side...
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1987 Silverado - L83 5.3 w/ 6L80e ,A/C,P/W,P/L,TILT, HID projectors, Wilwood C-10 Pro Spindles w/ 2018 silverado front brakes & C-5 Corvette Rear Disc Brakes 1999 BMW 528i - 5.7 LS1 w/ 4l60e, Ford 8.8 IRS w31 spline posi & FX-r projector retrofit New project: 2006 BMW x5 6cyl AWD to L83 6l80e 4wd to 2WD / RWD A poor man buy's it twice finally got my domain name back, 87chevy.com.... site rework in progress |
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04-16-2010, 04:19 AM
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#11 |
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Registered User
Join Date: Mar 2009
Location: glen burnie md
Posts: 174
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Re: Front disc brakes smoking- '85 K3500
Could be excessive play in front wheel bearings or master cylinder rod not letting piston return to open brske fluid return hole in M/C. Is pedal hard and high? Loosen brake bleeders and if wheel spind, pressure is locked in W/C either by hoses or M/C.
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