Seems the fuel pump diaphragm is failing due to fatigue by travelling
further than design. You may want to check the thickness of the spacer
between your block and fuel pump. When I rebuilt my U20 the original spacer
was 0.187". I installed a spacer included in the Nissan gasket and seal kit
I got for the rebuild. It was almost twice the thickness.
It might be something else.
G
-----Original Message-----
From: datsun-roadsters-bounces@autox.team.net
[mailto:datsun-roadsters-bounces@autox.team.net] On Behalf Of Joe Russo
Sent: September-08-09 8:22 AM
To: datsun-roadsters@autox.team.net
Subject: [Roadsters] Fuel Pump Question
I put a NOS fuel pump on my U20. After about 6 months, fuel started coming
out
of the weep holes on lower part of the pump body. I suspect these holes are
there to exhaust the air from the diaphragm. SO I pulled the pump and the
diaphragm was decomposing (old rubber) but I could see no holes . I
replaced
the pump with a spare I had taken from a running engine. It too has fuel
coming
from these holes...another bad diaphragm?
Could it be any thing else - like a clog in a carb banjo bolt filter? Car
starts easily and runs strong - as long as you don't mind the smell of gas
(not
to mention, going up in flames!) Carbs are new beauties from Keith!
Thx
Joe
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