[V6-12v] stopping problems

[mike]

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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