The purge valve (EVAP purge solenoid) on a 5.7-liter Hemi is typically mounted on or near the intake manifold, usually close to the throttle body. Exact placement can vary by model year and vehicle, so consult the factory service manual for your specific year and model to confirm.
Where to look in the engine bay
Across most Mopar 5.7 Hemi installations, you’ll find the EVAP purge valve as a small black plastic component connected to the intake plenum or throttle body, with two vacuum hoses and an electrical connector. This makes it relatively easy to spot once you know what to look for.
Common locations you may find the purge valve include:
- On the top side of the intake plenum near the throttle body, with the electrical connector facing outward and two vacuum lines attached.
- On the firewall side of the engine, mounted to the intake manifold or a nearby bracket on some Charger/Challenger and Ram 1500 configurations.
- Directly adjacent to the throttle body in certain late-model setups, where the valve sits in the hose path between the canister line and the intake.
To identify it, look for a small square/rectangular black plastic valve with a multi-pin electrical connector and two vacuum hoses. If you’re unsure, tracing the EVAP canister line (usually located toward the rear of the engine bay or near the fuel tank area) back toward the intake will reveal the valve along that line.
Year/model specifics to keep in mind
Because the 5.7 Hemi appears in several vehicles (Dodge Charger, Challenger, Ram trucks, etc.) and across multiple generations, the exact mounting spot can differ. For precise location, refer to your vehicle’s factory service manual or an OEM wiring diagram for your exact year and model. A quick visual check in a well-lit engine bay will typically confirm the purge valve as a small black plastic unit with two vacuum hoses and a connector near the intake manifold or throttle body.
What it looks like and how to spot it quickly
The EVAP purge valve is a compact, black plastic component roughly the size of a small marker. It has two vacuum hose connections and a two- to three-pin electrical connector. In many installations, it sits along a short hose run between the EVAP canister line and the intake manifold or throttle body. Knowing these visual cues helps you locate it fast during inspection or replacement.
Tips for locating it on your specific vehicle
Helpful steps include:
- Consult the owner’s manual or a service diagram for your exact year/model to see the EVAP system layout.
- Trace the vacuum lines from the EVAP canister, which is typically mounted toward the rear of the engine bay or near the fuel tank area; the purge valve will lie along that hose path.
- Look for a small black valve with an electrical connector and two hoses near the intake plenum or throttle body.
If you still can’t locate the valve, consider checking online diagrams or calling a dealership parts desk with your VIN to confirm the exact purge valve position for your model year.
Summary
For most 5.7 Hemi engines, the purge valve is located on or near the intake manifold, commonly close to the throttle body. Exact placement varies by year and model, so consult the service manual or a wiring diagram for your specific vehicle. In practice, look for a small black plastic valve with two vacuum hoses and an electrical connector along the EVAP line path, and trace from the EVAP canister back toward the engine to confirm its location.