Brake Problem / Help !!!! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

WOLFMAN · 10-12-2003, 08:36 PM

My 86 truck had a V6 4.3 in it that I have changed out to a 406 V8. The truck is at a buddies shop about an hour away so I don't get to work on it much. It has taken about a year to swap engine and trans, do body work and get to the paint shop. Now, when I drove it to the paint shop some 6 months ago the front left disc brake locked up. So, I finally got my truck out of the paint after making them fix their crappy work. They stated that they didn't have any problems moving it around. About half way back to my buddies shop it (the front left) starts locking up again.
I figured, rusted disc, caliper problem, right? So, I put new calipers, pads, wheel bearings, and turned the rotors should fix the problem. Done, WRONG! Same problem with the front left. I have inspected the lines for pinches, none. The brakes bleed through, but once bleed the front left is locked up. Could this be a problem with the purportioning valve or what? If anybody has more brake knoledge please help!! THanks!!!!

RockHQ · 10-13-2003, 10:08 AM

The left caliper brake hose has collapsed internally, acting like a check valve. In most cases the hose looks OK from the outside, not showing any external damage. Replace both hoses while you're at it.

AirMale · 10-13-2003, 12:08 PM

You are correct sir! Those dang hoses always colapse

WOLFMAN · 10-14-2003, 01:06 PM

THANKS GUYS !!!!!!!!!! I haven't run into this before, I knew it had to be at the wheel (area) just ran out of parts, I thought. Seems like I just needed to go one part further! THANKS AGAIN! I'll let you know how it goes!

10-12-2003, 08:36 PM	#1
WOLFMAN Registered User Join Date: Jan 2001 Location: Memphis, Tennessee Posts: 96	Brake Problem / Help !!!! My 86 truck had a V6 4.3 in it that I have changed out to a 406 V8. The truck is at a buddies shop about an hour away so I don't get to work on it much. It has taken about a year to swap engine and trans, do body work and get to the paint shop. Now, when I drove it to the paint shop some 6 months ago the front left disc brake locked up. So, I finally got my truck out of the paint after making them fix their crappy work. They stated that they didn't have any problems moving it around. About half way back to my buddies shop it (the front left) starts locking up again. I figured, rusted disc, caliper problem, right? So, I put new calipers, pads, wheel bearings, and turned the rotors should fix the problem. Done, WRONG! Same problem with the front left. I have inspected the lines for pinches, none. The brakes bleed through, but once bleed the front left is locked up. Could this be a problem with the purportioning valve or what? If anybody has more brake knoledge please help!! THanks!!!! __________________ 68 GMC short fleetside / 350 LT! sb. / 350turbo w/shift kitand / 3:73 posi./ps/pdb/ac/front sway bar/15x8 rallys/"PORSCHE RED" w/ black tuck-n-rolled interior. 86 Chevy short fleetside w/ 406sb /400turbo w/ shift kit 2500 stall / cowl hood

10-13-2003, 10:08 AM	#2
RockHQ ROCKET POWER! Join Date: Feb 2003 Location: Finland, Europe Posts: 509	The left caliper brake hose has collapsed internally, acting like a check valve. In most cases the hose looks OK from the outside, not showing any external damage. Replace both hoses while you're at it. __________________ What did i do last nite? I had a wonderful time, That's what they tell me What did i do last nite? 1979 C-10 shortfleet: Olds 350, Th400, 12 bolt Current project: 1969 Olds 455 W-30, needing a rebuild Last edited by RockHQ; 10-13-2003 at 10:12 AM.

10-13-2003, 12:08 PM	#3
AirMale Senior Member Join Date: Jan 2003 Location: Atlantic City, NJ Posts: 1,073	You are correct sir! Those dang hoses always colapse __________________ 86 SWB 9.0 LITER T-400-OD 4.11 eaton-4/5 drop Best 1/4 12.51 @112mph no traction

10-14-2003, 01:06 PM	#4
WOLFMAN Registered User Join Date: Jan 2001 Location: Memphis, Tennessee Posts: 96	THANKS GUYS !!!!!!!!!! I haven't run into this before, I knew it had to be at the wheel (area) just ran out of parts, I thought. Seems like I just needed to go one part further! THANKS AGAIN! I'll let you know how it goes! __________________ 68 GMC short fleetside / 350 LT! sb. / 350turbo w/shift kitand / 3:73 posi./ps/pdb/ac/front sway bar/15x8 rallys/"PORSCHE RED" w/ black tuck-n-rolled interior. 86 Chevy short fleetside w/ 406sb /400turbo w/ shift kit 2500 stall / cowl hood



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