[DML] Re: D Brakes

["Harold McElraft" <hmcelraft@xxxxxxx>]

Believe it or not there are several things that can cause a low 
pedal. Most common is air in the system (an ineffective bench bleed 
of a new master cylinder is not too uncommon). Next is a faulty 
master cylinder - and it goes on to more granular issues from there. 
You shouldn't need any "pedal adjustment".

Since there is no "pumping up" to get pedal, this would imply there 
is no air in the system - except possibly at the master cylinder. 
Also, I don't know how the brake system was bleed but, if a pedal 
bleed was performed the pedal bottomed-out the master cylinder by 
allowing the pedal to go all the way to the floor. The sealing inside 
can get messed up when this is done - older MCs are always suspect 
for this - new MCs can get messed up too. I avoid pedal bleeds on all 
my cars for this reason. If the MC is eliminated as a cause then I 
would suspect a faulty caliper or bad brake lines? How does the car 
feel in a panic stop?

Harold McElraft - 3354



--- In dmcnews@xxxxxxxxxxxxxxx, "byrondelorean" <celiambyron@...> 
wrote:
>
> I had a full restoration of my DeLorean at Dave Bauerle's garage in 
> 2004. My DeLorean has been in my family since new. There is no one 
> that knows this car better then myself. I cared for this (my dad's 
> car) since I was 12 Years of age. I also just sold a DeLorean that 
> came in 3rd PLace at the DCS Millenium Concourse this past year. My 
> concern & Looming irritating deal is with my brakes. I remember a 
> nice firm feeling when applying the brakes. Just like a cadillac's 
> power assist brakes. Nice smooth transition, just when you depress 
> the pedal it should go right into mode soft to firm. I told Dave 
> that the brakes did not feel right to me after I drove away. Dave 
> purchase remanufactured complete brake system from Specialty Auto. 
> My understanding was that my original brakes were to be completely 
> overhauled and re-installed. Hind site may have forced the issue of 
> either overhauling the existing or going with houston's set: But 
> before anyone gets bashed, there may be a simple solution. Pedal 
> adjustment? Here is the deal. The brakes consistantly depress about 
> 4" inches before action takes place. My 3rd place concourse car was 
> about 1/2", just the way I remembered it. Nice and firm. I have no 
> ackward pumping of the brake and variable pedal height that would 
> suggest the master cylinder. Having thought about the Master 
> Cylinder as suspect, I went ahead and bought a new master cylinder 
> from Houston. Nothing changed. Vaccum was tested. perfect. Lines 
> were bled 3 times. The owner at Munk's Motors (Porsche VW BMW)  
> agrees that my brakes are not adiquate compred to the other 
> DeLorean's he's had the privelage to work on and drive. He does not 
> know what is going on either. No leaks.
> John Hervey & Dave Bauerle spoke about the issue with no resolve 
for 
> me. Yet another year goes by. I want the brakes to work right, I 
> spent the money, have no problem to spend more when someone can 
tell 
> me what is needed. So for me the brake sytsem is suspect.
> 
> Any one that can solve this problem for me is my friend for life. 
> Unfortunately Dave's shop is a 3 hour drive, so warranty issues are 
> not an easy task. Dave did a remarkable job on my car. To date it 
> drives and sound like new other than the brakes. However Dave is 
> only as good as the parts he recieves. I also had a faulty battery 
> light caused by a connection form the alternator purchased at 
> Specialty. When I conduct business, a vendor and manufacturer 
> (myself) get together with the customer to solve problems. I would 
> like to see this happen so I can feel as thou all that could be 
done 
> was done.
> Byron
>




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