[Diy_efi] Leaky fuel rail fiasco

[abn at access-4-free.com]

Drills as a general rule tend to cut oversize and
tri-lobular reamers cut cylindrical and to size...it's best
to drill undersize by a 64th or so and ream to size. You
could get an undersize drill and reamer on ebay or the store
if you dont have time. I'd take a spare piece of aluminum
drill an oversize hole, build up the walls with epoxy, then
drill and ream that to size to investigate how it works. If
it works then I'd take your fuel rails and do the same.
There are some other ways to get a round hole to size but
this should be the easiest with the equipment you have...


----- Original Message Follows -----
From: "Chris Carson" <fastcarson at prodigy.net>
To: "A list for Do-It-Yourself EFI" <diy_efi at diy-efi.org>
Subject: [Diy_efi] Leaky fuel rail fiasco
Date: Sat, 31 Jul 2004 00:28:53 -0400

> Hi folks...
> I've been fighting with this leaky fuel rail for days now,
> trying to get my car to run. The fuel rail was standard
> extrusion from Holley, that I used a 35/64" drill bit to
> drill the injector holes in, followed up with a de-burrer
> and chamfer. But now I'm worried that it may have been too
> big???? New o-rings all around... The angles of the
> injectors are not perfect either, as I did it all on a
> cheapie drill press, and it's hard to center a 35/64
> inside a 3/4" hole...but I DID epoxy the bungs in with the
> injectors and fuel rail in them.  Now that I've made
> hold-downs and used a secondary o-ring and C-clip at the
> bottom of the injector, it isn't nearly as bad, but still
> mists fuel in certain places.
> 
> Can I get an oversized o-ring or something that will
> alleviate this problem??? Anyone have ANYthing to input
> here??????? I'm gonna epoxy those f#()#*^#ing injectors on
> the fuel rail!!!!!!!!!!!! Chris
> 
> 
> 
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