1958 - 1961 Corvette: Service Bulletin: Fuel Pump Diaphragm Leakage
Subject: Fuel Pump Diaphragm Leakage
Model and Year: 1958-61 V-8 High Capacity Fuel Pump (348 V-8 Type)
Source: Chevrolet Technical Service Bulletin
Bulletin Number: DR #474, Section VIm - (May 23, 1961)
TO: ALL CHEVROLET DEALERS
If fuel leakage occurs between the pulsator diaphragm and the fuel pump cover on the subject pump, Part #5624444 Fuel Pump Parts Package should be used for repairs.
This package includes a new oval shaped pulsator diaphragm, two new screws and lock washers. The new diaphragm shape prevents it from being pulled into the pulsator cavity by the pump vacuum. The pulsator cover screws with lock washers prevent loss of cover screw torque.
The new pulsator diaphragm, screws and lock washers were incorporated in Production and Service fuel pumps produced after December 19, 1960. These fuel pumps, listed below, can be identified by the pulsator diaphragm which extends approximately 1/4" beyond the pulsator cover.
|PART NO.||MODEL USAGE||DESCRIPTION|
|5624444||All Below||Fuel Pump Parts Package|
|5621718||1959-61 Pass. 348 H.P.||Fuel Pump|
|* 5621665||1958-61 Pass. 348
1958-59 Pass. 283 w/F.I.
1959 Pass. 348 H.P.
1958-61 Truck V-8
|5621644||1958 Pass. 348 3 x 2||Fuel Pump|
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