Re: [DML] Brake Problem

["Dave Sontos" <dsontos@xxxxxxxxxxx>]

I had this same problem on my 93 pickup, drove me crazy trying to find the
problem.
Finally heard the hose whistling when bleeding the front caliper and
realized what the problem was.

Dave Sontos
----- Original Message ----- 
From: "David Teitelbaum" <jtrealty@xxxxxxxxxxx>
To: <dmcnews@xxxxxxxxxxxxxxx>
Sent: Saturday, October 23, 2004 6:28 PM
Subject: [DML] Brake Problem
>
> On a nearby Delorean I helped the owner with some brake problems. I
> mention this because it turned out to have an unusual cause. When he
> first got the car it pulled really hard to the right. I correctly
> diagnosed a stuck piston in the right caliper. We rebuilt it and it
> fixed the pull to the right. It never really seemed "right" but it
> definatly was better. Some time later (a year) the car would again
> pull really hard to the right after driving for a while. It pulled so
> hard to the right the right front wheel started to smoke! Afer waiting
> around an hour for it to cool off it would drive normaly for a while
> until it would lock up again. I thought maybe the brake fluid was
> contaminated and the water inside was turning into steam causing the
> pressure and locking up the right caliper. We flushed and bled and got
> no water or dirt out. Now I realize that was wrong because both front
> calipers would have locked up if the fluid was contaminated. I have
> seen this only twice and not on Deloreans. We changed the front right
> brake hose and the problem has not reoccured. It seems the inside of
> the brake hose comes loose and acts like a check valve. When the brake
> fluid heats up the pressure cannot be relieved back to the Master
> cylinder (this is called compensation) it forces the pistons on the
> caliper to lock up the rotor. I am bringing this up because most of us
> are driving on 20 + year old hoses. If anyone gets these symptoms they
> should immediatly consider the brake hose since it is way past it's
> service life.
> David Teitelbaum
> vin 10757







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