> Al Gietzen wrote:

 >
 > So here's my filler neck and bottle setup (first pic).  25# cap
 > overflows to overflow bottle with 15# cap.  Is my system pressure a.)
 > 25#; b.) 40#; or c.) something  else?
 >
 > I assumed that the 25# cap would relieve at 25# above outside
 > pressure, but then realized that there is a seal at the top of neck
 > just under the cap as well, so the relief 'valve' is seeing the
 > pressure to the relief line, which could be the 15# in the overflow
 > bottle, making the total 40#.  It depends on how much pressure the top
 > seal will hold.  Anybody know?
 >
 > The other concern that came to mind is that I have a 1/4" aluminum
 > line from the filler neck relief to the overflow bottle.  The i.d. is
 > about 5/32''.  Is this big enough?  Is there likely a time when the
 > coolant expansion is too rapid for this line and it dumps overboard
 > past the top seal at the cap?
 >
 > Could be I'll have to pressurize the system and measure the pressure
 > the caps hold, an the line size will have to be determined by experience.
 >
 > Second pic shows the completed installation.  At the pump outlet at
 > the top you see the air bleed (AN o-ring plug drilled up the center
 > and out the side just below the o-ring. Loosen it a turn and the air
 > can escape), the pressure sender below that, and the low level sender
 > at the bottom of the overflow bottle.
 >
 > Al

-Steve Brooks wrote:

 Al,
 Where did you get the blue radiator type hose that is in the photo ?

 Steve Brooks

   Its silicone hose, the old style was orange on the inside and green
on the outside but the new stuff is blue on the outside.
  This hose is very strong and oil and gas wont harm it, I use this
hose for coolant lines when possible and also use it for turbo boost
lines.
  It can be found at any industrial hose supply.

   Ken Welter

 
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