[V6-12v] stopping problems

[mike]

nope, sorry

FYI 12v.org does show a vacuum pump which "...is
omitted in every model made after 1992"


mike


mike --- Elliott Potter <mailinglist at eep.burdell.org>
wrote: 
> Man, that's totally weird.  I don't know of any
> non-vac brake setups in
> the US, but then (as I'm sure I mentioned) I don't
> know lots of stuff.
> 
> Ya learn something new every day.  You don't happen
> to have shop manuals
> for that car, do you?
> --
> Elliott
> 
> On Mon, 2 Aug 2004, [iso-8859-1] mike wrote:
> 
> > nope....two stage ps pump...one for ps, the other
> for
> > brakes, accumulator on the brake circuit only,
> > steering is direct off the pump, no vacuum pump
> and no
> > vacuum assist
> >
> > But, as i said, it's a uk car....they might well
> be
> > different in the us
> >
> > mike
> >
> >  --- Elliott Potter <mailinglist at eep.burdell.org>
> > wrote:
> > > On Mon, 2 Aug 2004, [iso-8859-1] mike wrote:
> > >
> > > > i think you are wrong this time...my UK '93 V6
> 80q
> > > has
> > > > a bomb (in the german m24 sense)....it's
> located
> > > > behind the wheel arch liner on the passenger
> side
> > > > front wheel
> > >
> > > There was, for a limited run (I don't know if
> this
> > > made it to the US ...
> > > anyone?), a hydraulic pressure accumulator on
> the
> > > power steering system
> > > (between the oil cooler->rack line and the
> pump).
> > > But it's still a
> > > hydraulic system, and the brakes are vacuum
> assisted
> > > (right?).  Do you
> > > have a vacuum pump on the back of one cylinder
> bank?
> > >
> > > > it also has the two stage ps pump and runs on
> > > green
> > > > gold
> > >
> > > They hung on to green gold for the hydraulic
> system;
> > > they seem to like
> > > it.
> > > --
> > > Elliott
> > >
> > > > mike
> > > >
> > > >  --- Elliott Potter
> <mailinglist at eep.burdell.org>
> > > > wrote:
> > > > > I'm frequently wrong about this stuff, but I
> > > still
> > > > > disagree:
> > > > >
> > > > > On Mon, 2 Aug 2004, [iso-8859-1] mike wrote:
> > > > > > The v6 na cars have the bomb too...
> > > > >
> > > > > The "bomb" on 5-cylinder cars is a hydraulic
> > > > > pressure accumulator, which
> > > > > has three hose connections (two are 2000+
> psi
> > > > > hydraulic connectors),
> > > > > whose function was to maintain *hydraulic*
> > > pressure.
> > > > >  This was necessary
> > > > > because turbo cars used a hydraulic brake
> boost
> > > > > system, as opposed to a
> > > > > vacuum assisted brake system, and the bomb
> > > (which
> > > > > was charged with
> > > > > high-pressure nitrogen) was there to
> maintain
> > > > > hydraulic pressure to the
> > > > > brake system.  It's called a bomb because it
> > > looks a
> > > > > bit like the German
> > > > > M24 and M34 ("potato masher") grenades.  I
> don't
> > > > > know for sure if non-turbo
> > > > > 5-cylinder cars had this but I don't think
> they
> > > did.
> > > > >
> > > > > Cars with the 12v V6 use a vacuum assisted
> brake
> > > > > system, and do not need
> > > > > a hydraulic pressure accumulator.  What the
> 12v
> > > V6
> > > > > _does_ have is a
> > > > > vacuum reservoir, which is a round plastic
> ball
> > > that
> > > > > sits in front of
> > > > > the intake manifold next to the ignition
> coil
> > > packs.
> > > > >  It looks a bit
> > > > > like the ACME brand bombs you see in
> cartoons,
> > > so I
> > > > > guess you could call
> > > > > it a bomb, though it's less likely to
> explode if
> > > > > mistreated like the
> > > > > turbo cars' bomb is (since it's just an
> empty
> > > > > plastic ball).  The main
> > > > > function of the vacuum reservoir is to
> provide
> > > > > vacuum for the intake
> > > > > manifold changeover valve, since that valve
> > > operates
> > > > > at high engine RPMs
> > > > > where the vacuum provided by the engine is
> > > reduced.
> > > > >
> > > > > The vacuum brake booster gets vaccum from a
> > > > > different part of the engine
> > > > > and is not connected to this reservoir.
> > > > >
> > > > > Having said all of that:
> > > > > - the large diameter vacuum lines that feed
> the
> > > > > brake booster do tend to
> > > > >   crack, and that could cause braking issues
> > > (though
> > > > > it's not as
> > > > >   likely).  Those lines plug in to the front
> of
> > > the
> > > > > intake manifold
> > > > >   unless you have a very early 1992 build.
> > > > > - the connection to the vacuum reservoir
> > > commonly
> > > > > cracks, and the
> > > > >   resulting vacuum leak can cause the sorts
> of
> > > > > problems that vacuum
> > > > >   leaks normally cause; generally rough
> running
> > > > > and/or CELs.
> > > > >
> > > > > *shrug*  Like I said, I could be wrong on
> this.
> > > I'm
> > > > > not doing a very
> > > > > good job of keeping up on 12v trivia since I
> > > don't
> > > > > have a 12v car
> > > > > anymore.
> > > > > --
> > > > > Elliott
> > > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> >
>
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