Astro Van M L4-151 2.5L (1985)
Fig. 3 Exploded view of Rochester Varajet E2SE Carburetor (Part 2 of 2)
The Varajet models 2SE and E2SE, Figs. 2 and 3, are two barrel, two stage, down draft design carburetors. Aluminum die castings are used for the
air horn, float bowl and throttle body. A heat insulator gasket is used between the throttle body and float bowl to reduce heat transfer to the float
bowl.
The primary stage has a triple venturi, with a small 35 mm bore, resulting in good fuel metering control during idle and part throttle operation. The
secondary stage has a 46 mm bore, providing sufficient air capacity for engine power requirements. An air valve is used in the secondary stage
with a single tapered metering rod.
The float chamber is internally vented through a vertical vent cavity in the air horn. The float chamber is also externally vented through a tube in
the air horn. A hose connects this tube directly to a vacuum operated vapor vent valve located in the vapor canister. When the engine is not
running, the canister vapor vent valve is open, allowing fuel vapor from the float chamber to pass into the canister where the vapor is stored until
normally purged.
