[Roadsters] 68 brake calipers - leak

[Larry Dziuba]

I forgot to mention that I had stainless steel sleeves put in quite a while 
ago.  They are spotless.  Larry.

----- Original Message ----- 
From: "Gary and Cindy Ault" <aultgc at att.net>
To: "Larry Dziuba" <roadster68 at shaw.ca>; "Datsun Roadster List" 
<datsun-roadsters at autox.team.net>
Sent: Sunday, March 11, 2012 9:29 PM
Subject: Re: [Roadsters] 68 brake calipers - leak


> Larry,
>
> The master cylinder puts a lot of pressure on the wheel cylinders  when 
> you depress the pedal.  You could have a very small cut or tear in the 
> piston seal, and not notice it, but have it be sufficient to allow fliud 
> past when the brakes are used.  You didn't mention the condition of the 
> cylinders, but I presume there are no pits or other irregularities.
>
> Minor pits can be removed by honing, but I don't know how to do that with 
> the center pin in the cylinder.  The cylinders can be sleeved, or replaced 
> at no small cost.
>
> Gary
>
> ----- Original Message ----- 
> From: "Larry Dziuba" <roadster68 at shaw.ca>
> To: "Datsun Roadster List" <datsun-roadsters at autox.team.net>
> Sent: Sunday, March 11, 2012 10:15 PM
> Subject: [Roadsters] 68 brake calipers - leak
>
>
>> Hello Everyone,  There has always been poor performance from my front 
>> disc brakes.  I pulled the passenger side and found one pad was wet and 
>> would not come out without some force.  It looks like brake fluid 
>> saturated it. I could not see any brake lines that were leaking.  I then 
>> pulled the piston. It appeared to be wet inside the dust boot.  I could 
>> not see any tears or even marks on the seal or any scratches on the 
>> cylinder wall.  I did put in brake kits about 5 years ago but have 
>> minimal miles on the roadster.  The lines have been bled a number of 
>> times over the years. Could the seal leak without a tear.  It looks good. 
>> Puzzled.  PS: the caliper is still thick enough.  Larry.
>>
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