Re: [DML] Re: Spoke too soon! - Thanks for tips on brake job.

[DMCVIN6683 <dmcvin6683@xxxxxxxxx>]

Sounds like your Master Cylinder is shot.

Inside the Master Cylinder it develops a wear pattern through the 
years. When you bleed the breaks you push the o-ring seals inside the 
master cylinder past the wear marks and they develop little cuts in 
them and then fail.

When i bleed brakes i put a hunk of wood under the pedal so when you 
"pump them up" you wont push the master cylinder past the wear marks 
and damage it.

Mark V



On Jul 15, 2005, at 7:02 AM, sweetp01569 wrote:

> After all the pats on the back I gave myself for doing the brakes,
> they started failing on my ride home yesterday!  I was coming to a
> stop, pressing the brake pedal, when the pedal lost pressure and
> slowly lowered to the floor!   I had to pump them quickly to build
> up some pressure, and worked my way home that way, making sure I had
> enough room in front of me.
>
> I immediately suspected that I didn't tighten a line fitting or
> bleeder screw enough, but when I got home, I didn't notice any fluid
> leaking in the driveway.  I haven't checked anything yet, and will
> this weekend.  I am hoping it is a simple answer.  Could I hve a big
> air pocket left in the system, is the brake cylinder failing?  A
> little puzzled, but hope to solve tomorrow.
>
> Paul
> VIN 10944
>
> --- In dmcnews@xxxxxxxxxxxxxxx, "sweetp01569" <paul.sweet@xxxx>
> wrote:
>> I wanted to thank those who gave me guidance on my recent brake
> job
>> I did myself.  I replaced all the original calipers (and original
>> brake shoes still on the car - 27,000 miles) with the loaded
> cadmium
>> coated rebuilds from SpecialT Auto (not plugging the vendor, as I
>> also purchase from all of them, to share and support those who
>> support our fine cars, but nice pieces, nonetheless!)
>>
>> I was only able to get the driver's side front and rear rotors off
>> the car, even after tips on removing the rear spacer plates and
>> exhaustive attempts with a rubber mallet, then a 2 x 4 and hammer
> (I
>> have a souvenir blood blister behind my middle fingernail from
> that
>> hammer - Ouch!)
>>
>> I was going to take them to a local shop for turning, but since I
>> could only get two off, I kept them all on the car instead and
>> sanded them with a rotary attachment on my drill with #80
> sandpaper,
>> as suggested by David Teitelbaum (Thanks David, it worked like a
>> charm to eliminate the glaze, and saves rotor material in the long
>> run!).
>>
>> I bought stainless break lines, but had trouble freeing the old
>> lines (was bending the frame mounts trying the free the nut, and
> the
>> rears seemed a little challenging to get my hands in there - I'll
>> wait till someone else can put them in, perhaps during a visit to
> PJ
>> Grady's).
>>
>> After installing the new loaded calipers and bleeding the brakes,
>> the car handles so much better!  The brakes feel like new (No more
>> squealing and shimmying (my passenger front caliper was never
> fully
>> releasing the rotor).
>>
>> Feels good to complete a job myself and bringing the Delorean to a
>> condition closer to that when it was new.
>>
>> Thanks again everyone!
>>
>> Paul
>> VIN 10944
>
>
>
>
>
>
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