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Skyler pulls to the left if braked suddenly....
Posted by: rnch ()
Date: November 30, 2019 02:43PM

Guessing that the right caliper piston (disc brakes on the front) is stuck?

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Re: Skyler pulls to the left if braked suddenly....
Posted by: mtmouse ()
Date: November 30, 2019 03:01PM

Lots of reasons for a car to pull under braking. Loose or worn suspension, unequal application of the brakes, worn shocks, unequal load in the car, etc.
If you live near a dirt road then hit the brakes hard on dirt then go back and look at when each wheel both front and rear locked up. You may find different lockup points between sides or even front to rear. That lets you know where your braking is coming from. If all wheels appear to be braking at the same time and same amount then look elsewhere.
Just a quickie test.
Just my 2c
Joe

Joe in South Ga
1965 Corsa 2 dr Coupe Turbo 4sp because I love the looks
18ft Chaparral 180 Sport because I live on a lake, seemed like the thing to do
Chevy Pickup to tow boat and tote things
Chevy Cavalier because they drive like a go-cart

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Re: Skyler pulls to the left if braked suddenly....
Posted by: joelsplace ()
Date: November 30, 2019 07:19PM

Does it pull on the steering wheel or does the car pull and you have to correct with steering? If it is the latter the rear brakes are a problem. They will fool you.

Joel
Northlake, TX
5 Ultravans, Lost count at 100 Corvairs...

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Re: Skyler pulls to the left if braked suddenly....
Posted by: Brizo ()
Date: November 30, 2019 08:32PM

It cant be the brakes. Everybody on Corvair Center says disc brakes always stop perfectly straight.

Dan Brizendine,
'64 8door Greenbrier 140 PG. "In beautiful Wanamaker Indiana...with one stop light and 5 pizza shops"

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Re: Skyler pulls to the left if braked suddenly....
Posted by: MattNall ()
Date: November 30, 2019 10:46PM

They do!! UNTIL one piston sticks....and usually the one opposite the pull! Just like drums.

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: Skyler pulls to the left if braked suddenly....
Posted by: joelsplace ()
Date: December 01, 2019 05:05AM

And then its your master cylinder.

Joel
Northlake, TX
5 Ultravans, Lost count at 100 Corvairs...

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Re: Skyler pulls to the left if braked suddenly....
Posted by: rnch ()
Date: December 01, 2019 05:16AM

MattNall Wrote:
-------------------------------------------------------
> They do!! UNTIL one piston sticks....and usually the one opposite the pull! Just like drums.


My opinion also.

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Re: Skyler pulls to the left if braked suddenly....
Posted by: Caraholic4life ()
Date: December 01, 2019 02:03PM

After the brakes stick, do they eventually release?

There is a chance that one of the rubber brake hoses needs replaced. In a effort to save a dollar, many people won't replace a hose that appears good externally.
Rubber brake hoses often look good visually on the outside but they deteriorate from the inside out.
When a rubber brake hose is bad, it has a tendency to collapse when the brakes are applied.
The result is the fluid does not immediately flow back when the brake pedal is released, the hose stays collapsed and slowly opens which causes the brake pads to remain in contact with the rotor.
IF your inside brake pad is worn a whole lot more than the outer pad, this is likely a good place to look first.

1962 95 F.C. Van
1965 Monza Coupe
Westminster, Maryland

MID ENG enthusiast &
prior Kelmark owner.

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Re: Skyler pulls to the left if braked suddenly....
Posted by: joelsplace ()
Date: December 01, 2019 03:12PM

I used to think that also before I actually thought about it. If one pad is worn more than the other on a floating caliper the caliper isn't floating correctly. It may also have a dragging piston but that isn't the reason the pads wear unevenly.

Yes the do normally release eventually sort of. They tend to keep dragging and not release completely. In my experience wheel cylinders locking up is a lot more noticeable than sticky calipers.

My G30 had the pulls to the right when suddenly braking problem but it wasn't bad if you gradually hit the brakes. It was brake fluid on the right rear. It was really dangerous pulling a trailer.

Joel
Northlake, TX
5 Ultravans, Lost count at 100 Corvairs...

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Re: Skyler pulls to the left if braked suddenly....
Posted by: American Mel ()
Date: December 01, 2019 03:24PM

Caraholic4life Wrote:
-------------------------------------------------------
> After the brakes stick, do they eventually release?
>
> There is a chance that one of the rubber brake hoses needs replaced. In a effort to save a dollar, many people won't replace a hose that appears good externally.
> Rubber brake hoses often look good visually on the outside but they deteriorate from the inside out.
> When a rubber brake hose is bad, it has a tendency to collapse when the brakes are applied.
> The result is the fluid does not immediately flow back when the brake pedal is released, the hose stays collapsed and slowly opens which causes the brake pads to remain in contact with the rotor.
> IF your inside brake pad is worn a whole lot more than the outer pad, this is likely a good place to look first.


I had one go bad once , but it did not collapse.
A layer of the hose delaminated(?), on the inside.
It acted like a heart-valve.
It would allow all fluid to travel one direction, but very little the other.
It allowed very little fluid to travel to the cylinder when you applied the brakes, but it would easily return all fluid after after the pedal was released.

-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
WA. state, 1 mile south of the Canadian border,
I am not at the end of the world, but you can see it from here.
Have; '66 Monza Coupe - 140, 4-spd. Daily driver beater
'67 Monza Vert. - 140, 4-spd. Daily driver beater
'67 A/C Moredoor Monza
Have had; '61 Monza coupe, '62 Monza Wagon, '63 Spyder, '65 Corsa
.
non-vair
'04 Dodge Cummins Quad Dualy, approaching 400K
17'Terry

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Re: Skyler pulls to the left if braked suddenly....
Posted by: joelsplace ()
Date: December 01, 2019 03:27PM

Mel, I've had that happen also as well as the other way. Lets fluid through but doesn't let it return. I thought that was what was wrong with my G30 but the hoses were fine. I didn't even replace the shoes. Just cleaned off the fluid with brake cleaner.

Joel
Northlake, TX
5 Ultravans, Lost count at 100 Corvairs...

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Re: Skyler pulls to the left if braked suddenly....
Posted by: mtmouse ()
Date: December 02, 2019 11:39AM

All the talk of brakes not releasing doesn't seem to address the problem at least as I read it. He said the car pulled on sudden brake application. A dragging or stuck brake would be a problem but it sounds like the car behaves Ok until a sudden brake application. Pulling on a hard brake application and not on "Normal" brake use would lead me in several directions not just dragging brakes.
Joe

Joe in South Ga
1965 Corsa 2 dr Coupe Turbo 4sp because I love the looks
18ft Chaparral 180 Sport because I live on a lake, seemed like the thing to do
Chevy Pickup to tow boat and tote things
Chevy Cavalier because they drive like a go-cart

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Re: Skyler pulls to the left if braked suddenly....
Posted by: The Stig ()
Date: December 02, 2019 11:59AM

rnch you calipers on Skyler were new in 2015.... but certainly within possiblity that they could corrode up and seize. Front brake lines are braided stainless. Dual MC was new as well... I usually replace all brake lines on any of my cars, but I can not say for sure if I did the rears on that car.

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Re: Skyler pulls to the left if braked suddenly....
Posted by: American Mel ()
Date: December 02, 2019 05:59PM

mtmouse Wrote:
-------------------------------------------------------
> All the talk of brakes not releasing doesn't seem to address the problem at least as I read it.

Ha! Welcome to CCF. We tend to get sidetracked around here. grinning smiley


He said the car pulled on sudden brake application. A dragging or stuck brake would be a problem but it sounds like the car behaves Ok until a sudden brake application. Pulling on a hard brake application and not on "Normal" brake use would lead me in several directions not just dragging brakes.

Sounds reasonable.
So tell us what directions it leads you?
To quote someone who posted recently, it
"doesn't seem to address the problem at least as I read it."

-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
WA. state, 1 mile south of the Canadian border,
I am not at the end of the world, but you can see it from here.
Have; '66 Monza Coupe - 140, 4-spd. Daily driver beater
'67 Monza Vert. - 140, 4-spd. Daily driver beater
'67 A/C Moredoor Monza
Have had; '61 Monza coupe, '62 Monza Wagon, '63 Spyder, '65 Corsa
.
non-vair
'04 Dodge Cummins Quad Dualy, approaching 400K
17'Terry

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Re: Skyler pulls to the left if braked suddenly....
Posted by: Lane66m ()
Date: December 02, 2019 07:17PM

Warped rotor. May not see it on slow application.

Al Lane
Ellabell, GA 31308

1966 Monza Coupe, 110 hp, 4 Spd
1966 Monza More Door 110 hp, PG
1968 Camaro SS Coupe 350 CI 295+ hp PG
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
1947 Farmall A tractor 15 hp


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Re: Skyler pulls to the left if braked suddenly....
Posted by: F125AXer ()
Date: December 02, 2019 07:50PM

Lane66m Wrote:
-------------------------------------------------------
> Warped rotor. May not see it on slow application.

First thought I had too.

A rotor that has too much lateral runout will push the pads too far apart during coast/driving. The brake on the other side of the car will then apply sooner, causing a pull with a quick application.

Alan
'66 Corsa, coming out of mothballs in the spring, I hope!

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Re: Skyler pulls to the left if braked suddenly....
Posted by: rnch ()
Date: December 03, 2019 05:30AM

The Stig Wrote:
-------------------------------------------------------
> rnch you calipers on Skyler were new in 2015.... but certainly within possiblity that they could corrode up and seize. Front brake lines are braided stainless. Dual MC was new as well... I usually replace all brake lines on any of my cars, but I can not say for sure if I did the rears on that car.



Thanks for the info, Stig. I'm still quite pleased with your ex.

In case I do need to replace the caliper: What is the interchange? What model car did they come from?

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Re: Skyler pulls to the left if braked suddenly....
Posted by: Lane66m ()
Date: December 03, 2019 06:03AM

Have your rotor check first at O'Reillys. They can true them up. Less cost than replacing a caliper that may have caused it.

Al Lane
Ellabell, GA 31308

1966 Monza Coupe, 110 hp, 4 Spd
1966 Monza More Door 110 hp, PG
1968 Camaro SS Coupe 350 CI 295+ hp PG
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
1947 Farmall A tractor 15 hp


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Re: Skyler pulls to the left if braked suddenly....
Posted by: mtmouse ()
Date: December 03, 2019 03:11PM

Well, like I said. I would find a piece of dirt or sandy road and hit the brakes at about 20mph to make sure they all "Dig the same size hole". If they apply evenly I would look at suspension bushings, wheel bearings, tire pressure, shocks, brake reaction rods, tie rod ends, idler arms, ball joints, etc. Basically any part that is required to keep the wheel pointed the correct direction.
NOT ruling out brake system, just saying there is a lot of parts under there for a reason.
Just my 2c
Joe
American Mel Wrote:
-------------------------------------------------------
> mtmouse Wrote:
> -------------------------------------------------------
> > All the talk of brakes not releasing doesn't seem to address the problem at least as I read it.
>
> Ha! Welcome to CCF. We tend to get sidetracked around here. grinning smiley
>
>
> He said the car pulled on sudden brake application. A dragging or stuck brake would be a problem but it sounds like the car behaves Ok until a sudden brake application. Pulling on a hard brake application and not on "Normal" brake use would lead me in several directions not just dragging brakes.
>
> Sounds reasonable.
> So tell us what directions it leads you?
> To quote someone who posted recently, it
"doesn't seem to address the problem at least as I read it."

Joe in South Ga
1965 Corsa 2 dr Coupe Turbo 4sp because I love the looks
18ft Chaparral 180 Sport because I live on a lake, seemed like the thing to do
Chevy Pickup to tow boat and tote things
Chevy Cavalier because they drive like a go-cart

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Re: Skyler pulls to the left if braked suddenly....
Posted by: mtmouse ()
Date: December 03, 2019 03:26PM

P.S. An old rubber brake line will also swell as pressure is applied if the fabric weave is deteriorating so that wheel will apply pressure later than the others and with less force. That is why the dirt road test to make sure they all apply at the same time.
Joe

Joe in South Ga
1965 Corsa 2 dr Coupe Turbo 4sp because I love the looks
18ft Chaparral 180 Sport because I live on a lake, seemed like the thing to do
Chevy Pickup to tow boat and tote things
Chevy Cavalier because they drive like a go-cart

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