[V6-12v] stopping problems

[mike]

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

it also has the two stage ps pump and runs on green
gold

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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