6.7 Cummins valve cover replacement is two different jobs depending on the generation: on 2007.5-to-2018 trucks the CCV filter is a separate cartridge on top of the cover, and cover replacement is a gasket-driven repair you choose; on 2019-and-newer trucks the CCV filter is built into the cover itself, so a saturated filter at its 75,000-mile interval means replacing the entire cover assembly, a part in the 140-to-200 dollar range that dealers have quoted 400 dollars to install and owners replace in one to two driveway hours.
This guide covers both generations, why the integrated design changed the job, the oil-leak chain that makes a clogged filter mimic a failed gasket, the DIY steps, and the parts decision, with the Cummins Valve Cover Gasket Harness Kit that surrounds the work.
Table of Contents
Key Takeaways
- [The generational split]: 2007.5-2018 trucks: the CCV filter is a separate cartridge on the cover, replaced at 67,500 miles, and cover replacement is its own gasket-driven decision. 2019-plus trucks: the filter is integrated into the cover, so filter service at 75,000 miles is cover replacement by definition.
- [The parts arithmetic]: The integrated cover-and-filter assembly runs roughly 140 to 200 dollars against dealer quotes near 400 dollars for the install, a spread that pays for the tools in one Saturday.
- [The leak chain]: A saturated CCV filter pressurizes the crankcase, and the pressure pushes oil past the cover gasket and every other seal, which is why a clogged filter mimics a failed gasket exactly.
- [The symptom split]: Oil weeping at the cover seam with healthy crankcase pressure is the gasket's fault; pressure symptoms everywhere at once, dipstick walking, oil in the intake, leaks at multiple seals, are the filter's fault with the gasket as collateral.
- [The job size]: One to two driveway hours either generation: sockets, a torque wrench, the new cover or cartridge with its gasket, and no special tools.
- [The diagnosis before parts]: Test the pressure side before condemning the gasket, the platform lesson our CCV family guide teaches and this post applies, because a new gasket under a pressurized crankcase is a comeback waiting for its appointment.
- [The interval discipline]: 67,500 miles on the older trucks, 75,000 on the new, and severe-duty trucks should err early, because every mile past the interval is pressure the seals absorb.
Two Generations, Two Jobs
The 6.7's valve cover story splits at the 2019 model year, and knowing which side you are on is the whole answer. Through 2018, the cover is a cover: the CCV filter sits on top of it as a serviceable cartridge, replaced on its own schedule, and the cover itself only comes off for gasket leaks or repairs, which makes valve cover replacement the deliberate repair the generic leak guide describes, linked in the repair section below.
From 2019, the filter moved inside: the CCV element is molded into the cover assembly, and the "filter replacement" line item in the maintenance schedule is, physically, a valve cover replacement. The design consolidated parts and plumbing, and the trade was that filter service went from a sixty-dollar cartridge to a full assembly.
Because Dodge/Ram updated internal valvetrain designs across different production runs, knowing your engine’s precise generation ensures you select the correct gasket profile and follow exact valve lash specs while the top end is exposed. For a complete overview of cylinder head revisions, injection changes, and maintenance schedules across all model years, consult our master 6.7 Cummins engine guide.
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Shop 6.7 Cummins Valve Cover Gasket & Harness Kits→The Leak Chain: Filter to Gasket
Here is the diagnostic insight that saves 6.7 owners the repeat repair. The CCV circuit exists to pull pressure out of the crankcase, and the filter is the separator that keeps oil mist from riding that circuit into the intake. When the filter saturates, two failures arrive together: the crankcase pressurizes because the circuit cannot breathe, and that pressure finds the valve cover gasket, the dipstick tube, and every soft seal on the engine.
The oil weeping from the cover seam looks like a gasket failure, smells like a gasket failure, and is treated by gasket replacement, but if the filter caused it, the new gasket starts leaking on the same schedule the old one did. That is the pressure-costume logic the 6.7 CCV filter guide documents from the filter side, linked below, and it is the reason the diagnosis on this engine runs upstream before the parts order.
A leaking valve cover gasket is frequently the direct downstream symptom of a neglected crankcase ventilation circuit. When clogged coalescing media prevents pressure from venting, crankcase overpressurization forces engine oil past valve cover mating surfaces and wiring pass-through seals.
To understand how internal pressure spikes destroy valvetrain seals, explore our analysis on not changing CCV filter 6.7 Cummins.
Symptoms: Which Part Is Asking
The symptom table, sorted by what it usually means on this platform:
Symptom |
Most Likely Culprit |
The Test |
|---|---|---|
Oily seam at the cover, everything else normal |
The cover gasket |
Clean, drive, trace the fresh oil; pressure behavior normal points at the seal |
Oil leaks from multiple seals at once |
Saturated filter pressurizing the crankcase |
Check the filter's interval and the CCV circuit's breathing |
Dipstick walking out, oil in the intake |
Pressure, almost always the filter on this engine |
The CCV filter is the first stop |
Rough idle with oil in the intake tract |
CCV circuit overwhelming the separator |
Filter condition, then the reroute or catch-can conversation |
The DIY Steps
The job, both generations, in the order the repair runs:
- Cold engine, top access: remove the intake tube and anything bracketed over the cover; on this engine the access is genuinely good.
- Remove the CCV connections and bolts: the fasteners release in any sensible order, and the cover lifts free with the gasket, which usually comes with the new part.
- Prep the sealing surface: clean the head's flange completely, inspect for warpage with a straightedge, and keep debris out of the open valvetrain.
- Install the new cover or cartridge: seat the fresh gasket, position the cover, and start every bolt by hand.
- Torque in sequence to spec: the cover's fasteners are small, and the spec is the difference between a seal and a warp; no impact guns.
- Reconnect and verify: CCV lines seated, intake tube clamped, a warm idle, and a re-check for fresh oil after the first drive.
Parts Decision and Intervals
The parts conversation is short and honest on this platform:
- The integrated assembly, 2019-plus: OEM and quality aftermarket covers run roughly 140 to 200 dollars, and the decision is brand and source, not architecture, because the filter comes with the cover.
- The cartridge era, 2007.5-2018: fifty to 140 dollars for the filter on its schedule, with cover replacement reserved for actual cover or gasket faults.
- The dealer-spread: quotes near 400 dollars for a job owners complete in one to two hours are the arithmetic that turns this into a driveway repair, the platform forum threads on stock versus aftermarket covers document.
- The intervals: 67,500 miles on the cartridge trucks, 75,000 on the integrated trucks, and severe duty, towing, idling, dust, argues for erring early.
While the Cover Is Off
The open cover is a one-look inspection of the engine's upper end, and the 6.7 rewards the glance: the valvetrain's condition, oil cleanliness, and any sludge that would explain oil consumption are all visible, and the CCV circuit's baffles and ports can be checked for coking. Owners wrestling with chronic oil-in-the-intake issues are standing at the decision point the CCV system explainer covers: keep the closed circuit healthy, add a catch can, or, on off-road trucks, reroute, with the legality line that conversation always carries. For the street truck, the cover back on with a fresh filter and a flat gasket surface is the whole job.
FAQ
How much does 6.7 Cummins valve cover replacement cost?
The integrated 2019-plus cover-and-filter assembly runs roughly 140 to 200 dollars in parts, against dealer install quotes near 400 dollars. The cartridge-era trucks pay 50 to 140 dollars for the filter alone.
How long does the job take?
One to two driveway hours either generation: good access, basic sockets, a torque wrench, and no special tools.
Is the CCV filter really part of the valve cover?
On 2019-and-newer 6.7s, yes: the filter is integrated into the cover assembly, so filter replacement is cover replacement. On 2007.5-2018 trucks the filter is a separate cartridge on top.
When should the CCV filter be replaced?
About every 67,500 miles on the 2007.5-2018 trucks and 75,000 on the 2019-plus trucks, with severe-duty use arguing for earlier service.
Why is my valve cover leaking after a new gasket?
On this engine the usual cause is that the gasket was the symptom: a saturated CCV filter pressurizes the crankcase and pushes oil past every seal, including the new one. Test the filter and the circuit before the second gasket.
Can I replace just the gasket on a 2019-plus truck?
The gasket usually comes with the cover assembly, and since the filter is inside the cover, replacing the cover is the repair that refreshes both at once.
What are the symptoms of a clogged CCV filter?
Multiple oil leaks at once, a walking dipstick, oil in the intake and airbox, and rising oil consumption, the pressure signature our CCV filter guide walks in full.
Should I do anything else while the cover is off?
Inspect the valvetrain and oil condition, check the CCV baffles for coking, and decide the catch-can or reroute question with the facts in view rather than under a deadline.
The Verdict
The 6.7 Cummins valve cover replacement is the integrated era's honest job: one assembly that refreshes the separator, the gasket, and the pressure system's health in a single one-to-two-hour Saturday, at a parts price that makes the dealer spread look like a subscription. Diagnose the pressure side before blaming the seal, respect the torque spec, and use the open cover as the inspection window it is.
To ensure a leak-free seal and optimal injector wiring connection during your installation, grab this complete EGR Performance Cummins valve cover gasket & harness kit for a permanent, trouble-free fix.
