fuel

EVAP Purge Valve

for 2007 Ram 3500 5.9L I6 Cummins · 4WD

Difficulty

Easy

Time

54 min

Tools

Steps

🔍Draft — verification in progress. This procedure was built from OLP's spec database on August 20, 2026 and is queued for line-by-line review by Chris Hackleman — master technicians with 20+ years each. That review typically completes within 3 days of generation, and this banner changes to a verified badge the moment it does. Until then, cross-check every torque value and fluid capacity against the factory manual, and stop if anything looks unsafe. If something looks off, report it below — a real person reads every report.

This procedure covers the removal and replacement of the EVAP purge valve on a 2007 Ram 3500 with the 5.9L Cummins diesel engine.

Warnings

⚠Perform this repair with the engine cold to avoid contact with hot components

ℹ️The EVAP system is under slight vacuum when the engine is off; you may hear a slight hiss when disconnecting lines

Tools required

Flathead screwdriverEssential

10mm socketEssential

Ratchet with extensionEssential

Needle nose pliers

Shop towelsEssential

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Parts

EVAP purge valve × 1 — Use OEM specification

As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.

Preparation

Park vehicle on level ground and engage parking brake
Turn ignition to OFF position and remove key
Allow engine to cool completely if recently operated
Open hood and secure with prop rod

Procedure

1
Locate EVAP purge valve
The EVAP purge valve is mounted on the driver side of the engine compartment, near the firewall below the brake master cylinder. It is a cylindrical solenoid valve with two vacuum lines and an electrical connector.
2
Disconnect battery negative terminal
Using a 10mm socket, loosen the negative battery cable clamp nut and remove the cable from the battery terminal. Position the cable away from the battery to prevent accidental reconnection.
3
Disconnect electrical connector
Press the locking tab on the electrical connector attached to the purge valve and pull the connector straight off the valve. Do not pull on the wires themselves.
4
Disconnect vacuum line from purge valve inlet
Locate the vacuum line connected to the inlet side of the purge valve (line coming from the intake manifold). Using a flathead screwdriver if needed, carefully pry the retaining clip off and pull the vacuum line straight off the valve nipple. Inspect the line for cracks or damage.
5
Disconnect vacuum line from purge valve outlet
Locate the vacuum line connected to the outlet side of the purge valve (line going to the fuel tank/EVAP canister). Remove the retaining clip and pull the vacuum line straight off the valve nipple. Inspect this line for cracks or damage as well.
6
Remove purge valve mounting bracket bolt
Using a 10mm socket and extension, remove the single bolt securing the purge valve mounting bracket to the firewall or inner fender. Keep the bolt for reinstallation.
7
Remove purge valve from bracket
If the valve is secured to the bracket with a clip or clamp, release it and slide the purge valve out of the mounting bracket. Remove the valve from the engine compartment.
8
Install new purge valve
Position the new EVAP purge valve into the mounting bracket in the same orientation as the old valve was installed. Ensure the electrical connector and vacuum line ports are accessible and facing the correct direction.
9
Reinstall mounting bracket bolt
Insert the mounting bracket bolt and tighten securely using the 10mm socket. Ensure the valve is firmly mounted and does not move or vibrate.
10
Reconnect vacuum lines
Push the vacuum lines firmly onto the inlet and outlet nipples of the new purge valve until they are fully seated. Install the retaining clips on both connections to secure the lines. Ensure each line is connected to the correct port (inlet from manifold, outlet to canister).
11
Reconnect electrical connector
Push the electrical connector onto the purge valve solenoid until the locking tab clicks into place. Gently tug on the connector to verify it is secure.
12
Reconnect battery negative terminal
Position the negative battery cable onto the battery terminal and tighten the clamp nut using a 10mm socket until secure. Do not overtighten.

Reassembly

Verify all vacuum lines are properly connected and secured with retaining clips
Ensure electrical connector is fully engaged with locking tab seated
Double-check mounting bracket bolt is tight

Verification

Start the engine and allow it to reach normal idle
Listen for any vacuum leaks or unusual hissing sounds around the purge valve area
Use a scan tool to verify no EVAP system codes are present (P0441, P0443, P0455, P0456)
Perform an EVAP system monitor drive cycle if required to verify proper purge valve operation
Monitor for Check Engine Light illumination during initial test drive