Fuel Pump Check Valve...

[Bruce Plecan]

One word,  Earl's
They have a web site but I forget their URL.
Bashful


> Another quick question for you guys... :)
> Anyone know of a source for an inline, high pressure check valve...in
either
> a 5/16" or 3/8" (dual barbed), or -6AN? Reason I am asking, is I have an
> older (about 8 years old) Bosch pump (that used to be sold by Accel for
> applications up to 420HP) on my 67 Camaro TPI, that had a few problems. I
> think the pump was built before they had any idea that MTBE and other such
> nasty additives would be added to fuel...so they used plain old buna-N
> O-rings to seal the pump internally. Well...when I was moving the car
around
> a bit ago...I noticed a nice stream of gas pouring out the back of the
> car...about where the pump was (with maybe 300-400 miles on the pump).
> Knowing that raw fuel dumping on my hot exhaust system was not a good
thing
> ;) I immediately shut down the motor and verified it was the pump. After
> quickly moving it back onto my lift, I pulled the pump and noticed the gas
> was coming from between the outer housing and the pump outlet housing end
> plate (?), right around where the crimp is. So..I undid the crimp, and
> pulled the pump apart. There are two O-rings which seal the suction from
the
> pressure side and the pressure side from the outside of the pump. Both
were
> hard as rock and cracked...hence, the leak. So, I replaced them with Viton
> O-rings, put the pump back into the housing, put down a nice bead of epoxy
> around the housing and end plate and rebent the crimps down. Well...I
should
> have checked the check valve as well...since it also is a rubbery
material.
> I guess it leaks as well, since after I had the pump together, I could
blow
> through the pump both ways...although backwards WAS harder, it didn't seal
> :( . I did verify this with a pressure gauge as well..when I put the key
to
> on, the pump runs for a couple of seconds and the pressure rises nicely to
> 42psi. As soon as the pump shuts down, the pressure drops...takes maybe
3-4
> seconds to drop back to zero. Since the check valve is in the outlet of
the
> pump, and this particular one cannot be pulled from the outside, I need to
> rig something up to maintain my fuel pressure for startup purposes. Any
> ideas?
> Larry