86 K10, pulls right under hard braking - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Duro5341 · 02-13-2007, 05:46 PM

Hey guys

My 86 K10 pulls to the right while braking hard. I don't notice it normally, but I am very easy on my brakes. It has newer calipers, pads, and machined rotors on the front

It's not something I am terribly scared about, more of an annoyence.....

I am wondering if it is the MC, or the proportioning valve.....being the lines look good, and I am not loosing any fluid at all

Thanks
Cameron

**old Rusty C10** · 02-13-2007, 06:12 PM

could be alot of things but if the calipers are both good and the pads are wearing evenly id also check to make sure that the wheel bearings are good then the proportioning valve

Restrorob · 02-13-2007, 07:06 PM

Could be a brake hose collapsing internally causing a restriction in fluid flow to one side, Have seen that a couple times.

PhilaTruck · 02-13-2007, 09:02 PM

Quote:

Originally Posted by Restrorob

Could be a brake hose collapsing internally causing a restriction in fluid flow to one side, Have seen that a couple times.

I strongly agree with RestroRob. I ran into the same thing a few years back w/ my 83. If that's what it is, expect it to get worse.

Crank · 02-13-2007, 09:09 PM

Hey... what do ya know.. mine does the same thing, well my C10 does, it pulls right on hard braking... so guess what I do... STEER LEFT!

Brandon

Restrorob · 02-13-2007, 11:14 PM

Quote:

Originally Posted by Crank

guess what I do... STEER LEFT!

Brandon

Bet that's fun on wet roads....

87 STEPPER · 02-14-2007, 07:57 AM

Yeah it sounds like a brake hose issue i had a '92 S10 that did that and it was a bad hose on the drivers side.

If you replace the hoses i'd go with a set of Earls SS Braided ones i'v got them on my '87 and it's been at least 10 yr's now and no problems yet and they give a much firmer pedle cuz theres no hose flex under braking pressure.

Good luck

CLASSIC87' · 02-14-2007, 08:01 AM

Quote:

Originally Posted by PhilaTruck

I strongly agree with RestroRob. I ran into the same thing a few years back w/ my 83. If that's what it is, expect it to get worse.

I had the same problem... and it ended up being the rubber lines breaking down internally. If it pulls right; then you need to replace the left side... and vise-versa if it pulls to the left. I recommend changing them both at the same time... if you dont; you'll be under there again soon.

Anthony

PhilaTruck · 02-14-2007, 09:51 AM

Quote:

Originally Posted by CLASSIC87'

I had the same problem... and it ended up being the rubber lines breaking down internally. If it pulls right; then you need to replace the left side... and vise-versa if it pulls to the left. I recommend changing them both at the same time... if you dont; you'll be under there again soon.

Anthony

Good point, Anthony. If one side's not getting fluid, the other side pulls. Seems backwards.

piecesparts · 02-14-2007, 12:08 PM

Check or replace the front brake hoses, would be my vote. I have had that happen on a couple trucks.

slugish · 02-14-2007, 02:07 PM

My 84 does same thing. because of advice from all of you will be replacing my brake hoses soon also. seems like a common problem with these trucks.

KShortell · 02-14-2007, 04:52 PM

I had a weird left-then-right-then straight thing a few years ago myself. New front hoses and calipers solved it. I believe the calipers were shot and I ran throught pads more quickly than I shouldv'e been.

Rebuilt calipers were $15 each at NAPA and new hoses ran about $30 per side. It's been fine ever since.

-Kevin
1986 C10 Suburban Silverado

86k10 · 02-14-2007, 10:23 PM

I had that trouble with mine too until I replaced the calipers.

method2mymadnes · 02-14-2007, 11:07 PM

I have had the brake hose and the caliper cause this before.

Hoods69BadBowTie · 02-15-2007, 07:15 AM

I vote new brake hoses. As stated above they are probably internally coming apart.

VTKidder · 02-15-2007, 02:21 PM

Had it happen on my '69 Z/28. Pulls hard to the right on braking; many have told me its a front hose, but its one of those "round to it" things. With 37" of fresh snow....brakes on a summer cruiser isn't really priority 1.

I respectfully disagree with 87 Stepper on the hoses. I'd just pick up OEM replacement rubber hoses from a parts store. I've always thought that SS lines were more for high-performance, heavy duty braking systems where you really need to feel the pedal, and expansion cannot be tolerated, like racing. In a 20 year old 4x4 truck...I'd save my money and just get the rubber lines and worry about it again in another 20 years.

Duro5341 · 02-16-2007, 07:00 PM

Well I will just replace both front hoses, and I will just be getting the standard rubber hoses from our Jobber, and put them on at the shop where it's warm, and I have a hoist.....So far everything including belts, and hoses have been original on this truck, so I would assume the front flex lines are aswell, 21 years is old enough to retire them, they've done there job well

Duro

PhilaTruck · 02-16-2007, 10:44 PM

Warm, good. Cold, bad. Good for you for having a heated shop. Mine were a real bear. They rusted on- had to heat-em up to get them off. Careful around the gas lines on pass. side.

02-13-2007, 05:46 PM	#1
Duro5341 Registered User Join Date: Dec 2006 Location: Earth Posts: 239	86 K10, pulls right under hard braking Hey guys My 86 K10 pulls to the right while braking hard. I don't notice it normally, but I am very easy on my brakes. It has newer calipers, pads, and machined rotors on the front It's not something I am terribly scared about, more of an annoyence..... I am wondering if it is the MC, or the proportioning valve.....being the lines look good, and I am not loosing any fluid at all Thanks Cameron

02-13-2007, 06:12 PM	#2
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,319	Re: 86 K10, pulls right under hard braking could be alot of things but if the calipers are both good and the pads are wearing evenly id also check to make sure that the wheel bearings are good then the proportioning valve __________________ 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!!

02-13-2007, 07:06 PM	#3
Restrorob The One And Only !!! Join Date: Jan 2007 Location: Hole in the woods Florida Posts: 4,567	Re: 86 K10, pulls right under hard braking Could be a brake hose collapsing internally causing a restriction in fluid flow to one side, Have seen that a couple times. __________________ 93 Jeep XJ 88 Buick La Sabra Toys; 88 TA-GTA in the works.... 97 GMC Ext. Cab 502 Crate 5 Spd......Sucks Gas But Haulz Azz ! The primary function of an Engineer is to make it difficult for the Fabricator and impossible for the Mechanic. *"Why go out preserved when you can go out beat up, worn out, sliding in sideways screaming, Holy Sh!t What A Ride" !!!*

02-13-2007, 09:09 PM	#5
Crank Registered User Join Date: Aug 2002 Location: Crittenden, KY Posts: 1,965	Re: 86 K10, pulls right under hard braking Hey... what do ya know.. mine does the same thing, well my C10 does, it pulls right on hard braking... so guess what I do... STEER LEFT! Brandon Last edited by Crank; 02-13-2007 at 09:10 PM.

02-14-2007, 07:57 AM	#7
87 STEPPER STILL PLAYS WITH TRUX Join Date: Nov 2002 Location: Melbourne, Fla. Posts: 2,764	Re: 86 K10, pulls right under hard braking Yeah it sounds like a brake hose issue i had a '92 S10 that did that and it was a bad hose on the drivers side. If you replace the hoses i'd go with a set of Earls SS Braided ones i'v got them on my '87 and it's been at least 10 yr's now and no problems yet and they give a much firmer pedle cuz theres no hose flex under braking pressure. Good luck __________________ ~~Bruce~~ MY 87 STEPPER MY 99 2D/WD TAHOE

02-14-2007, 12:08 PM	#10
piecesparts Parts and more parts Join Date: Nov 2003 Location: Lebo, Kansas (middle of nowhere Posts: 6,821	Re: 86 K10, pulls right under hard braking Check or replace the front brake hoses, would be my vote. I have had that happen on a couple trucks.

02-14-2007, 02:07 PM	#11
slugish Slugish Join Date: Jan 2005 Location: Earlysville, Va. Posts: 1,024	Re: 86 K10, pulls right under hard braking My 84 does same thing. because of advice from all of you will be replacing my brake hoses soon also. seems like a common problem with these trucks.

02-14-2007, 04:52 PM	#12
KShortell Registered User Join Date: Oct 2003 Location: Chesapeake, VA Posts: 734	Re: 86 K10, pulls right under hard braking I had a weird left-then-right-then straight thing a few years ago myself. New front hoses and calipers solved it. I believe the calipers were shot and I ran throught pads more quickly than I shouldv'e been. Rebuilt calipers were $15 each at NAPA and new hoses ran about $30 per side. It's been fine ever since. -Kevin 1986 C10 Suburban Silverado __________________ Semper Paratus

02-14-2007, 10:23 PM	#13
86k10 Registered User Join Date: Feb 2003 Location: Bertrand, Nebraska Posts: 355	Re: 86 K10, pulls right under hard braking I had that trouble with mine too until I replaced the calipers. __________________ 98 Neon 97 Grand Prix GT 02 Grand Prix 40th Anniv. 86 GMC 5.0 77 Olds 98 6.6 REAL AMERICANS, DRIVE AMERICAN

02-14-2007, 11:07 PM	#14
method2mymadnes Registered User Join Date: Jun 2003 Location: Dyersburg, TN Posts: 327	Re: 86 K10, pulls right under hard braking I have had the brake hose and the caliper cause this before. __________________ 87% of all statistics are made up on the spot.

02-15-2007, 07:15 AM	#15
Hoods69BadBowTie Chevys Kick A$$ Join Date: Jan 2005 Location: Zootown, MT Posts: 12,699	Re: 86 K10, pulls right under hard braking I vote new brake hoses. As stated above they are probably internally coming apart. __________________ HOODS is what I answer too -'79, '77, '88 Pickup Sold, '85 Camaro, '83 T/A, '81,'83,'90 K5 Blazer All Sold -'79 3/4 ton "Big Yellow Bananna" Lifted 4spd. 39.5 TSL Swampers, The money Pit -'86 K5 Blazer Silverado 6.2 4" lift 35"s -'95 Ext. Cab Shorty 4" Tuff Country rolling 35" M/T's -'83 Monte Carlo T-Tops. 126,500 Original Miles -LATER I would rather push a Chevy then drive a ford!!

02-15-2007, 02:21 PM	#16
VTKidder Registered User Join Date: May 2003 Location: Vermont Posts: 996	Re: 86 K10, pulls right under hard braking Had it happen on my '69 Z/28. Pulls hard to the right on braking; many have told me its a front hose, but its one of those "round to it" things. With 37" of fresh snow....brakes on a summer cruiser isn't really priority 1. I respectfully disagree with 87 Stepper on the hoses. I'd just pick up OEM replacement rubber hoses from a parts store. I've always thought that SS lines were more for high-performance, heavy duty braking systems where you really need to feel the pedal, and expansion cannot be tolerated, like racing. In a 20 year old 4x4 truck...I'd save my money and just get the rubber lines and worry about it again in another 20 years. Last edited by VTKidder; 02-15-2007 at 02:21 PM.

02-16-2007, 07:00 PM	#17
Duro5341 Registered User Join Date: Dec 2006 Location: Earth Posts: 239	Re: 86 K10, pulls right under hard braking Well I will just replace both front hoses, and I will just be getting the standard rubber hoses from our Jobber, and put them on at the shop where it's warm, and I have a hoist.....So far everything including belts, and hoses have been original on this truck, so I would assume the front flex lines are aswell, 21 years is old enough to retire them, they've done there job well Duro

02-16-2007, 10:44 PM	#18
PhilaTruck Right on the line, baby! Join Date: Oct 2003 Location: Phila, PA 19130 Posts: 1,486	Re: 86 K10, pulls right under hard braking Warm, good. Cold, bad. Good for you for having a heated shop. Mine were a real bear. They rusted on- had to heat-em up to get them off. Careful around the gas lines on pass. side. __________________ 83 GMC 406 th400/3.73 Eaton Truetrac posi, headers, x pipe, & racePros. Tubular control arms, lowering rear springs, caltracs. Still ugly, but getting built right, although slowly Click and scroll down for site vendors! Subscribe here!



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