4/6/2024 0 Comments 5.3 vortec engine for saleIn the event the vehicle runs out of fuel a check valve (11) in the exhaust aftertreatment fuel injector (10) supply line opens and the fuel supply pump back fills the. This is required for proper fuel injector operation. The fuel injector return line pressure regulator (14) maintains fuel pressure on the return side of the fuel injectors. The information listed here is for the stock LM7 engine. For marketing purposes, it was also known as the Vortec 5300. 3 small block engine used in GM trucks between 19. If you are adding an earlier injector to a later intake like an LS2 or LS3, you will need the larger diameter 0.570-inch O-rings. The difference is 0.025 to 0.030-inch (see chart). The newest LS3 fuel injector uses a larger diameter lower O-ring compared to all the previous injectors.
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