[Roadsters] 68 brake calipers - leak

[Gary and Cindy Ault]

Got to be getting past the seal(s).

----- Original Message ----- 
From: "Larry Dziuba" <roadster68 at shaw.ca>
To: "Gary and Cindy Ault" <aultgc at att.net>; "Datsun Roadster List" 
<datsun-roadsters at autox.team.net>
Sent: Sunday, March 11, 2012 10:47 PM
Subject: Re: [Roadsters] 68 brake calipers - leak


>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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