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Car Forum / Driving, Maintenance, Tuning / Maintenance and Repair / May 2008

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How is the best way to purge brake lines

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BSAKing@hotmail.com - 08 May 2008 23:44 GMT
I have to do a brake job on old Betsy and need to totally change the
brake fuid at the same time.

Is it best to totally drain the system, do repairs and then re-fill
eveything?

Or just undo what I have to and block the flow and then fill and bleed
until it is all done?

Or does it make any difference?

If it will not affect or cause issues, number 1 would be best I think
as I have to replace brake caliper seals in all 4 wheels. And I do
want to totally change the fluid as it has been years since it was
done - like 20 or so....

TIA...
Paul - 09 May 2008 00:13 GMT
> I have to do a brake job on old Betsy and need to totally change the
> brake fuid at the same time.
[quoted text clipped - 13 lines]
>
> TIA...

Depends on the vehicle.
Nate Nagel - 09 May 2008 00:21 GMT
> I have to do a brake job on old Betsy and need to totally change the
> brake fuid at the same time.
[quoted text clipped - 13 lines]
>
> TIA...

Do you have ABS?

nate

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BSAKing@hotmail.com - 09 May 2008 01:17 GMT
> BSAK...@hotmail.com wrote:
> > I have to do a brake job on old Betsy and need to totally change the
[quoted text clipped - 23 lines]
>
> - Show quoted text -

No - the patient in question is a 1976 Corvette 350 smogger
(stingray)....
Nate Nagel - 09 May 2008 01:25 GMT
>>BSAK...@hotmail.com wrote:
>>
[quoted text clipped - 27 lines]
> No - the patient in question is a 1976 Corvette 350 smogger
> (stingray)....

then it really doesn't matter.  I would probably replace the hoses while
I'm that far into it - if they're the original hoses the rubber may be
swollen and/or deteriorating.

nate

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Steve B. - 09 May 2008 01:26 GMT
>I have to do a brake job on old Betsy and need to totally change the
>brake fuid at the same time.
[quoted text clipped - 13 lines]
>
>TIA...

It's best not to let the system drain.

If the system drains you will may have to pull the master cylinder and
re bench-bleed it.  If the car in question has ABS you may have to
follow special procedures to bleed that.

If you are replacing the master cylinder too then don't worry about
it.

        Steve B.
BSAKing@hotmail.com - 09 May 2008 02:18 GMT
> On Thu, 8 May 2008 15:44:56 -0700 (PDT), "BSAK...@hotmail.com"
>
[quoted text clipped - 29 lines]
>
> - Show quoted text -

I was not intending to do the master unless needed and I think it is
ok - it is mainly leaking seals on the calipers. I was going to check
out the brake hoses (probably replace) and lines as they are original.
Nate Nagel - 09 May 2008 02:37 GMT
>>On Thu, 8 May 2008 15:44:56 -0700 (PDT), "BSAK...@hotmail.com"
>>
[quoted text clipped - 34 lines]
> ok - it is mainly leaking seals on the calipers. I was going to check
> out the brake hoses (probably replace) and lines as they are original.

If you end up replacing the hard lines, they're easy enough to bend
yourself but for a 'vette you can probably get prebent ones from Classic
Tube, Vette Brakes, etc.  Stainless is nice and you'll never do that
particular job again if you use it :)

If you're not replacing the MC I recommend either using a pressure
bleeder or else putting a scrap of 2x4 under the brake pedal when you
bleed so you don't wipe out the seals.

nate

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BSAKing@hotmail.com - 10 May 2008 14:50 GMT
> BSAK...@hotmail.com wrote:
>
[quoted text clipped - 52 lines]
>
> - Show quoted text -

I notice vette brakes has a complete kit with s/s lined calipers,
master, lines and hoses. I may go for that and be done with it. Has
anyone every dealt with Vette brakes? THere prices seem pretty good....
Nate Nagel - 10 May 2008 15:05 GMT
>>BSAK...@hotmail.com wrote:
>>
[quoted text clipped - 56 lines]
> master, lines and hoses. I may go for that and be done with it. Has
> anyone every dealt with Vette brakes? THere prices seem pretty good....

I personally haven't, but they've been around for years.  I remember
getting a catalog from them before I ever had internet access.  Must
have been when I was still in high school and working on my '49 Chevy
project.

nate

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Mike - 11 May 2008 20:29 GMT
On May 8, 9:37 pm, Nate Nagel <njna...@roosters.net> wrote:
> BSAK...@hotmail.com wrote:
> > On May 8, 8:26 pm, Steve B. <n...@none.com> wrote:
[quoted text clipped - 54 lines]
>
> - Show quoted text -

I notice vette brakes has a complete kit with s/s lined calipers,
master, lines and hoses. I may go for that and be done with it. Has
anyone every dealt with Vette brakes? THere prices seem pretty good....

----------------------------------------------------------------------------------

 I have never dealt with them but I have installed some of their calipers
before and they seem to be a very high quality product.

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