[DML] Re: TESTING THE FUEL ACCUMULATOR
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[DML] Re: TESTING THE FUEL ACCUMULATOR



There really isn't anywhere else safe to vent it. Other than to run 
another line all the way back to the tank. 

Dave S

--- In dmcnews@xxxxxxxxxxxxxxx, mike clemens <rmclemns@...> wrote:
>
> Okay, I agree you a 100% on what you said concerning the extra hose 
(small end of the accumulator).  I found a Bosch web site and found 
that the small end is actually supposed to be vented to the 
atmosphere, not attached to a return fuel line.  To be sure, I cut 
one of the bad ones I had in half.  To actually see what was inside 
was very interesting.  (pictures available for anyone who wants to 
see the parts)
>  
> Now, this raises another question:  If the small end is supposed to 
be vented to the atmosphere, are we not damaging the bladder inside 
the accumulator by having fuel present on both sides (the return line 
from the engine is just a simple "T" fitting and it is attached 
directly to the small end, with no way to block off unwanted fuel).
>  
> I fully understand that if the bladder fails, you don't want to pee 
fuel all over the underside of the car, but shouldn't that excess 
fuel go somewhere besides an open fuel line, which is connected to a 
semi-pressurized fuel tank??
>  
> Mike   TPS   1630
>  
> 
> 
> --- On Sat, 10/18/08, bitsyncmater <david.mckeen@...> wrote:
> 
> From: bitsyncmater <david.mckeen@...>
> Subject: [DML] Re: TESTING THE FUEL ACCUMULATOR
> To: dmcnews@xxxxxxxxxxxxxxx
> Date: Saturday, October 18, 2008, 9:04 PM
> 
> 
> 
> 
> 
> 
> The accumulator does not have a bypass. That extra hose is to 
return 
> fuel if the rubber diaphragm leaks or is ruptured.
> 
> Your dealing with a very small volume of air in your test. You will 
> need to use pipe sealer or Teflon tape on your connections to get 
> reliable results. If these are done you should get days, weeks or 
> longer before you see any drop in pressure.
> 
> --- In dmcnews@yahoogroups .com, mike clemens <rmclemns@ .> wrote:
> > 
> > I have been toying with the idea of testing an accumulator off 
the 
> car, but found no definitive way in any forums, so I devised a test 
> of my own. Please look at this and see if there are any flaws in my 
> thinking or test.
>  
> 
> 
> 
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> 
> 
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