Valve Cover

Factory plastic valve covers degrade rapidly under the extreme heat and pressure inside a diesel engine. Over time, heat cycling causes the plastic to become brittle, warp, and crack — leading to oil leaks, decreased crankcase ventilation efficiency, and potential contamination of your intake system.

SPELAB aluminum valve covers are machined from aerospace-grade 6061-T6 aluminum and are engineered to withstand up to 600°F and 120 PSI — far beyond what factory plastic can handle. Key advantages include:

• Superior heat dissipation, reducing thermal stress on internal components
• Leak-free sealing, eliminating oil seepage at the cover gasket
• Dramatically longer service life, with a one-time investment replacing repeated plastic part replacements
• Customizable aesthetics with multiple color options (silver, red, black, blue) to match your build

For trucks running tuned injectors, upgraded turbo systems, or those frequently hauling heavy loads, an aluminum valve cover is one of the most impactful upgrades you can make to protect your engine.

Compatible with: 2003–2024 Dodge Ram 5.9L/6.7L Cummins, 2004.5–2010 Ford 6.0L/6.4L Powerstroke, 2004.5–2010 GM 6.6L Duramax, and more.

Watch for these five warning signs that your factory valve cover is failing:

1. Oil seeping from the valve cover gasket — Wipe the cover clean, start the engine, and watch for fresh oil reappearing along the gasket line. This is the most common failure mode in diesel engines over 80,000 miles.
2. Excessive crankcase pressure — A blocked or failing CCV (Crankcase Ventilation) system causes pressure to build inside the valve cover, forcing oil past seals and into the intake tract. You may notice oil in your intercooler or boost tubes.
3. White or gray milky oil residue inside the valve cover — This indicates coolant or fuel contamination, often caused by a warped or cracked cover allowing moisture ingress.
4. Rough idle or misfire — Accumulated oil deposits on sensors and spark plug tubes (on gas engines) disrupt combustion.
5. Visible cracks, warping, or corrosion on the factory plastic cover — Common after 100,000+ miles, especially on trucks driven primarily for short trips where the engine never fully reaches operating temperature.

Pro tip: If your truck is approaching 100,000 miles and you haven't inspected the valve cover, schedule a visual check during your next oil change. Replacement takes 1–3 hours depending on the model.

Both materials are significant upgrades over factory plastic, but they serve different use cases. Here's how to decide:

Billet Aluminum Valve Covers

• CNC-machined from a single block of 6061-T6 aluminum
• Superior tensile strength and dimensional accuracy
• Perfect sealing surface, virtually eliminating gasket failures
• Ideal for: tuned trucks, heavy towing, off-road/overland builds, and owners who want the best durability
• Typical price range: $299–$539

Cast Aluminum Valve Covers

• Aluminum alloy castings, then machined for sealing surfaces
• Strong enough for stock and mildly modified builds
• More affordable, with solid long-term reliability
• Ideal for: daily-driven trucks, budget-conscious upgrades, and stock-configuration engines
• Typical price range: $139–$329

Bottom line: If you run a stock truck with no plans for future power adders, a cast aluminum cover delivers 90% of the benefit at half the price. If your truck is tuned, lifted, running larger tires, or used for commercial towing — spend the extra on a billet cover. The precision sealing surface and added strength are worth it under sustained high-load conditions.

SPELAB offers both options across Cummins, Powerstroke, and Duramax platforms.

SPELAB designs valve covers for the most popular diesel and gas platforms in North America. Use this guide to find your exact match:

• 5.9L Cummins — Dodge Ram 2500/3500 (2003–2005) — Billet aluminum
• 5.9L / 6.7L Cummins — Dodge Ram 2500/3500 (2006–2024) — Billet or cast aluminum
• 6.0L Powerstroke — Ford F250/F350/F450/F550 (2004.5–2007) — Billet aluminum
• 6.4L Powerstroke — Ford F250/F350/F450/F550 (2008–2010) — Billet aluminum
• 6.6L Duramax (LLY/LBZ/LMM) — Chevy/GMC 2500HD/3500HD (2004.5–2010) — Billet aluminum
• 5.7L / 6.1L / 6.4L Hemi — Dodge Ram, Chrysler 300, Jeep GC (2003–2020) — Cast or billet aluminum
• Chevy Big Block BBC — Various GM vehicles (1966–2000) — Cast aluminum

Important: When ordering, you must confirm both the engine displacement (e.g., 6.7L, not just "Cummins") and the exact model year. Some engines share the same platform but require different part numbers. If you're unsure, contact SPELAB support with your VIN.

CCV stands for Crankcase Ventilation Valve — a emission control component required on all modern diesel engines. Here's why it matters:

How the CCV system works in a diesel engine:

1. Combustion gases leak past piston rings into the crankcase, carrying oil vapor and pressure
2. The CCV valve routes these gases back into the intake manifold to be re-burned
3. Without filtration, this oil vapor coats the intercooler, intake piping, and turbocharger blades with sludge

The problem: Factory plastic valve covers often have inadequate CCV routing, leading to excessive oil consumption, intercooler contamination, and carbon buildup on turbo components.

SPELAB's integrated CCV filter design captures up to 95% of oil vapor before it enters your intake tract, providing:

• Cleaner intake charge — improved combustion efficiency
• Protected turbocharger from oil-fouled compressor blades
• Reduced engine bay odors and oil consumption
• Extended time between intake system cleanings

Best practice: Replace the CCV filter element every 30,000–50,000 miles, or sooner if you notice increased oil consumption or intake sludge. SPELAB valve cover kits include the filter, hoses, clamps, and mounting hardware — everything needed for installation.

Yes — most mechanically-inclined truck owners can complete the installation as a DIY project. Here's what to expect:

Estimated installation time:

• First-time DIYer: 3–5 hours
• Intermediate mechanic: 1.5–3 hours
• Professional technician: 45 min – 1.5 hours

Model-specific notes:

• Dodge Ram (Cummins): Relatively straightforward from the top. Most owners report 1–2 hours. Drain engine oil or use a tarp to catch residual oil during removal.
• Ford Powerstroke 6.0L: Most challenging due to tight packaging and PCC tube routing. Some models require cab tilt or removal. Allow extra time if this is your first Powerstroke service.
• Ford Powerstroke 6.4L: Similar to the 6.0L but slightly more accessible. 2–3 hours for most DIYers.
• GM Duramax (LLY/LBZ/LMM): Easiest of the three diesel platforms. Direct top access with no major obstacles. 1–2 hours is typical.

What's included in the kit: SPELAB provides a complete install package — CCV filter, hoses, clamps, filter element, bracket, and all hardware. No additional purchases required.

Tools you'll need: Standard socket set, torque wrench (for proper gasket tightening sequence), ratchet extensions, and gasket sealant (optional, for extra-sealing on high-mileage engines).

After installation: Allow 24 hours before heavy loads or spirited driving to let the gasket seal fully cure. Check for leaks after the first engine heat cycle.

Here's why:

• SPELAB valve covers use the same mounting points and bolt patterns as factory covers — no sensor relocations or harness modifications are required.
• No electronic components are housed inside or attached to the valve cover itself. All engine sensors (MAP, MAF, crankshaft position, camshaft position) remain unaffected.
• Aluminum is non-magnetic and non-conductive in the context of engine bay electronics — there is no risk of electromagnetic interference.
• No ECU recalibration or tune changes are needed after installation.

If your truck's valve cover has an attached wiring harness or sensor (such as some Ford Powerstroke models with factory oil pressure senders), SPELAB designs include proper cutouts or adapters to accommodate these components. Refer to the model-specific install guide in the box.

The valve cover upgrade delivers immediate benefits on its own — improved sealing, better aesthetics, and integrated CCV filtration. However, pairing it with complementary upgrades unlocks additional performance gains:

Recommended combinations by goal:

• Reduce oil consumption: Valve cover + CCV kit + Catch can — Addresses the full crankcase ventilation path
• Increase horsepower: Valve cover + cold air intake + tuner — Cleaner intake air + better combustion = more power
• Protect turbo: Valve cover + catch can + intake cleaning — Keeps oil and carbon away from turbocharger
• Engine bay aesthetics: Valve cover + color-matched fittings — Visible upgrade with no mechanical benefit
• High-altitude towing: Valve cover + EGR delete + upgraded intercooler — Reduced soot = cleaner combustion under load

Important: A valve cover is a passive upgrade — it doesn't force more air or fuel into the engine. If you're chasing horsepower gains, the tuner/programmer is the highest-ROI investment. Start there, then add the valve cover to protect your engine from the increased boost and cylinder pressures that come with more power.

Minimum recommended approach: Replace the valve cover alone if your budget is tight or the truck is stock. You'll still get a cleaner engine bay and peace of mind from a leak-free seal.