Subject: SIPHON BREAKER PLATE UNIT #7014900 FUEL INJECTION
Model and Year:1958 PASSENGER CARS AND CORVETTES
Source: Chevrolet Service Bulletin
Bulletin Number: TSB #565, Section VIm
Date: October 14, 1958
Improper seating of leakage past the spill plunger of 1958 Fuel Injection unit, part #7014900, may result in fuel being siphoned from the fuel bowl into one or more cylinders where the inlet valve happens to be open. The resulting hydrostatic lock can cause bent connecting rods and eventual connecting rod breakage. The condition occurs when the engine is re-started after being shut off for several hours. "Stalling" of the starting motor during engine re-starting might be an indication of fuel siphoning into the cylinders.
To overcome this problem, a Siphon Breaker Plate Kit, - part #7017143, has been released for service and is available in limited quantities for installation on #7014900 Fuel Injection units where it is suspected hydrostatic lock problems exist. Future production #7014900 Fuel Injection units will also incorporate this feature.
Part #: 7017143*
Description: Siphon Breaker Kit
Kit consists of -
7017314 Siphon Breaker Plate Assembly
7014927 3/16" Diameter Tube Elbow
7014461 Rubber Coupling
7014104 Pump Gasket
7006119 10-32 x 15/16 Screw (4)
7010422 10-32 x 3/4 Screw
* Unpublished number - order through Central Office P & A Dept.
Reference is made to Section V, Manual TP-5, 1958 CHEVROLET CARBURETION AND FUEL INJECTION: -
Flat Rate Time - .7 hour
General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.
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Article ID: 766
Created: August 3, 2014
Last Updated: August 3, 2014
Online URL: https://www.corvetteactioncenter.com/tech/knowledgebase/article/1958-corvette-service-bulletin-siphon-breaker-plate-unit-7014900-fuel-injection-766.html