engine

PCV Valve

for 2014 Ram 2500 6.7L I6 Cummins Diesel · 4WD

Editorial review:Chris Hackleman — Master Technician · 20+ years · Jeff Moore — Master Mechanic · 20+ years

Difficulty

Easy

Time

30 min

Tools

Steps

✓Expert-verified. Personally reviewed and approved by OLP's master technicians (Chris Hackleman & Jeff Moore — 20+ years each). Always follow the vehicle's factory service information and torque specs.

Replace the PCV valve on the 6.7L Cummins diesel engine to restore proper crankcase ventilation and prevent oil leaks or excessive crankcase pressure.

Warnings

⚠Allow engine to cool completely before starting work to avoid burns from hot components

ℹ️The 6.7L Cummins uses a different crankcase ventilation system than gasoline engines; locate the correct PCV valve on the valve cover

Tools required

Socket set (8mm-13mm)Essential

Torque wrench (5-50 Nm range)Essential

Flat-blade screwdriver

Pliers

Clean shop ragsEssential

Parts cleaning solvent

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Parts

PCV valve × 1 — Use OEM Mopar specification for 6.7L Cummins
PCV valve grommet/seal × 1 — Often included with PCV valve

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 surface and engage parking brake
Allow engine to cool completely
Open hood and secure with prop rod
Locate PCV valve on driver side valve cover near the front of the engine

Procedure

1
Disconnect PCV hose
Locate the PCV valve on the driver side valve cover. Disconnect the crankcase ventilation hose from the PCV valve by gently pulling it off or releasing any retaining clip. Note the routing of the hose for reinstallation.
2
Remove old PCV valve
Using a socket or appropriate tool, carefully unscrew the PCV valve from the valve cover in a counterclockwise direction. If the valve is stuck, gently rock it back and forth while turning. Remove the valve and inspect the grommet or seal that remains in the valve cover.
3
Inspect valve cover opening
Clean the PCV valve mounting area on the valve cover with a clean shop rag. Remove the old grommet or seal if it did not come out with the valve. Inspect the mounting hole for any debris or oil buildup and clean thoroughly.
4
Install new grommet
If a new grommet or seal is provided with the replacement PCV valve, install it into the valve cover mounting hole. Ensure it is fully seated and properly positioned before installing the valve.
5
Install new PCV valve
Thread the new PCV valve into the valve cover by hand, ensuring it starts smoothly without cross-threading. Once hand-tight, use a torque wrench to tighten to specification. The valve should be snug but not over-tightened as it threads into aluminum.
Torque spec
PCV Valve8 Nm (6 lb-ft)
6
Reconnect ventilation hose
Reconnect the crankcase ventilation hose to the new PCV valve, ensuring it is fully seated. Secure any retaining clips if equipped. Verify the hose routing matches the original configuration and has no kinks or sharp bends.

Reassembly

Double-check all connections are secure and hose is properly routed
Verify no tools or rags were left in engine compartment

Verification

Start engine and allow to idle for 2-3 minutes
Check for any unusual hissing sounds or vacuum leaks around the PCV valve
Verify no oil leaks around the PCV valve mounting area
Confirm engine idles smoothly without rough running or excessive smoke
Check that crankcase ventilation hose connections are secure with no oil weeping

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