[DeTomaso] Brake Master Cylinder Issue
Bill Cartus
bcartus at yahoo.com
Wed Mar 4 16:42:40 EST 2020
Ken,
Thanks for the reply. It's not your typical o-ring as it has "flares" similar to the wheel cylinder rebuild kits I have used on American cars. And getting an accurate measure has been tricky as I don't have such fine measuring tools. I'm going to hit the local stores per Mike & Sean's suggestion, then contact Don Byers per their suggestions too.Bill
On Wednesday, March 4, 2020, 04:31:51 PM EST, Ken Green <kenn_green at yahoo.com> wrote:
Maybe measure the ID of the cylinder or OD of the piston, and find an O-ring?
On Wednesday, March 4, 2020, 1:17:47 PM PST, Mike Drew via DeTomaso <detomaso at server.detomasolist.com> wrote:
It's from Precision Proformance (Bobby Byars RIP). It's a Chevy master and red rolled stock booster assembly. He also offered a slightly smaller aftermarket booster.
In any case, the master is generic Chevy. I think it's a step-bore design, where the front and rear circuits use a different piston/bore diameter?
Mike
Sent from my iPhone
> On Mar 4, 2020, at 10:27, Sean Korb <spkorb at gmail.com> wrote:
>
> I'm not sure but I think that is a Pantera Performance part, which is
> a redrilled booster and master from a full size Chevrolet van. You
> might be able to grab the casting number off the master and get a
> replacement from AutoZone or RockAuto or NAPA.
>
>> On 3/4/20, Bill Cartus via DeTomaso <detomaso at server.detomasolist.com> wrote:
>> My brake master cylinder was leaking so I took it off. I can easily see
>> that the problem is the larger rubber 'o-ring' has a small crimp in it
>> (not sure how it was even working unless the rear portion was doing
>> most of the work), but it appears no one sells a repair kit (per
>> Wilkinson rep I talked with). I can't see spending $289 for a whole new
>> master cylinder when a $1 part will take car of it. Does anyone know
>> where I can get these parts? Has anyone used an after market unit from
>> Summit Racing (as an example) replacing the tandem unit attached to the
>> booster? I have a 1972 car and assume it has an Italian factory
>> replacement unit from around 2016. Attaching a small pic below. All
>> advice appreciated.
>> Thanks,
>> Bill Cartus #3633.
>
>
> --
> Sean Korb spkorb at gmail.com http://spkorb.org (est 1994)
> "Computers are useless. They can only give you answers." -P. Picasso
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-------------- next part --------------
Ken,
Thanks for the reply. It's not your typical o-ring as it has "flares"
similar to the wheel cylinder rebuild kits I have used on American
cars. And getting an accurate measure has been tricky as I don't have
such fine measuring tools. I'm going to hit the local stores per Mike
& Sean's suggestion, then contact Don Byers per their suggestions too.
Bill
On Wednesday, March 4, 2020, 04:31:51 PM EST, Ken Green
<kenn_green at yahoo.com> wrote:
Maybe measure the ID of the cylinder or OD of the piston, and find an
O-ring?
On Wednesday, March 4, 2020, 1:17:47 PM PST, Mike Drew via DeTomaso
<detomaso at server.detomasolist.com> wrote:
It's from Precision Proformance (Bobby Byars RIP). It's a Chevy master
and red rolled stock booster assembly. He also offered a slightly
smaller aftermarket booster.
In any case, the master is generic Chevy. I think it's a step-bore
design, where the front and rear circuits use a different piston/bore
diameter?
Mike
Sent from my iPhone
> On Mar 4, 2020, at 10:27, Sean Korb <[1]spkorb at gmail.com> wrote:
>
> I'm not sure but I think that is a Pantera Performance part, which is
> a redrilled booster and master from a full size Chevrolet van. You
> might be able to grab the casting number off the master and get a
> replacement from AutoZone or RockAuto or NAPA.
>
>> On 3/4/20, Bill Cartus via DeTomaso
<[2]detomaso at server.detomasolist.com> wrote:
>> My brake master cylinder was leaking so I took it off. I can easily
see
>> that the problem is the larger rubber 'o-ring' has a small crimp in
it
>> (not sure how it was even working unless the rear portion was doing
>> most of the work), but it appears no one sells a repair kit (per
>> Wilkinson rep I talked with). I can't see spending $289 for a whole
new
>> master cylinder when a $1 part will take car of it. Does anyone
know
>> where I can get these parts? Has anyone used an after market unit
from
>> Summit Racing (as an example) replacing the tandem unit attached to
the
>> booster? I have a 1972 car and assume it has an Italian factory
>> replacement unit from around 2016. Attaching a small pic below.
All
>> advice appreciated.
>> Thanks,
>> Bill Cartus #3633.
>
>
> --
> Sean Korb [3]spkorb at gmail.com [4]http://spkorb.org (est 1994)
> "Computers are useless. They can only give you answers." -P. Picasso
> _______________________________________________
>
>
> Detomaso Email List is not managed by POCA
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use the links above.
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list. They also grant the list owner permission to maintain an archive
or approve the archiving of list messages.
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