Disclosure: As an Amazon Associate, we earn from qualifying purchases. If you click a link on this page and make a purchase, we may receive a small commission at no extra cost to you.
A failing PCV valve can cause rough idling, increased oil consumption, sludge accumulation, and annoying vacuum leaks in Chrysler-family engines. Replacing this small component is one of the easiest ways to restore proper crankcase pressure and maintain engine health. The Mopar 68210345AC PCV Valve is a direct-fit factory replacement designed specifically for Chrysler, Dodge, Jeep, and Ram vehicles. This review breaks down its build quality, real-world installation process, and performance to help you decide if this OEM part is the right choice for your vehicle maintenance.
Quick Verdict
Rating: 9.2/10 (Recommended OEM Replacement)
Best For: Chrysler, Dodge, Jeep, and Ram owners needing a factory-exact PCV valve replacement to fix rough idle or oil blow-by.
Bottom Line: The Mopar 68210345AC delivers precise factory fitment, durable machined construction, and restored crankcase ventilation in a quick 20-minute installation. While fitment must be verified by VIN beforehand, it offers peace of mind over generic aftermarket options.
| Specification | Detail |
|---|---|
| Brand | Mopar (Genuine OEM) |
| Part Number | 68210345AC |
| Product Type | Positive Crankcase Ventilation (PCV) Valve |
| Item Weight | 2.46 oz |
| Package Dimensions | 3 × 4 × 3 inches (Valve: approx. 2.5 in length, 0.75 in diameter) |
| Port Configuration | 2 connection ports (4-inch inlet/outlet connections) |
| Exterior Finish | Machined finish |
| Manufacturing Standards | ISO 9001, ASME, ASTM, MSS SP 72, MSS SP 80 |
| Vehicle Compatibility | Chrysler, Dodge, Jeep, and Ram engines (Verify VIN) |
| Installation Time | 15 to 25 minutes using basic hand tools |
| Warranty & Returns | Manufacturer warranty support; 30-day Amazon voluntary returns |
What Is the Mopar 68210345AC PCV Valve?
The Mopar 68210345AC is an original equipment manufacturer (OEM) Positive Crankcase Ventilation valve engineered specifically for Chrysler-family engines. A PCV valve plays a critical role in your engine’s emissions system by routing unburned combustion gases from the crankcase back into the intake manifold. Over time, oil vapors and carbon deposits contaminate the internal spring mechanism, leading to valve sticking or vacuum leaks.
Weighing just 2.46 ounces with package dimensions of 3 x 4 x 3 inches, this compact component features a precision-machined exterior finish and standardized dual-port connections. Because it is a genuine Mopar component manufactured to ISO 9001, ASME, and ASTM standards, it guarantees exact dimensional tolerances and proper internal flow rates, eliminating the calibration guesswork associated with third-party auto parts.
Who Should Buy It?
Best For
- Owners of compatible Chrysler, Dodge, Jeep, or Ram vehicles experiencing rough idle or minor oil blow-by.
- DIY mechanics looking for a quick 20-minute repair using simple hand tools like pliers and flathead screwdrivers.
- Drivers who prefer genuine OEM factory components over unpredictable aftermarket replacement brands.
Skip If
- Your vehicle requires a different Mopar part number or custom thread pattern (always check VIN compatibility first).
- Your engine has heavy internal mechanical damage or piston ring blow-by that a PCV valve replacement alone cannot repair.
- You are running a heavily modified aftermarket turbo setup requiring an upgraded catch can or custom breather system.
Build Quality and Materials
The build quality of the Mopar 68210345AC reflects genuine factory standards. The exterior features a durable machined finish that resists corrosion and thermal stress inside the engine bay. Unlike cheap plastic aftermarket valves that can crack or warp under high engine bay heat, the housing maintains structural integrity over thousands of heat cycles.
Internally, the valve uses a calibrated spring and plunger mechanism built to meet ISO 9001, ASME, and ASTM certifications. This ensures that vacuum pressure opens and closes the internal check valve at precisely the flow rates specified by Chrysler engineers, keeping crankcase pressure balanced without causing vacuum drops.
Crankcase Ventilation and Idle Performance
When an old PCV valve sticks open, it creates an unmetered vacuum leak that disturbs the engine’s air-fuel ratio. This often causes rough idling, stalling, or Check Engine lights. Conversely, a valve that sticks closed traps high pressure inside the crankcase, forcing oil past valve cover gaskets and main seals.
Replacing a worn valve with the Mopar 68210345AC restores proper vacuum control immediately. Vehicle owners notice smoother engine idling, reduced oil vapor blow-by in the intake tract, and cleaner overall combustion. Maintaining correct crankcase pressure also reduces oil sludge formation, prolonging engine oil life.
Installation and Fitting Experience
Installing this PCV valve is a straightforward DIY maintenance task that takes between 15 and 25 minutes. It utilizes a standardized push-fit design with dual 4-inch connection ports, matching factory hose dimensions exactly.
You only need basic hand tools such as a pair of pliers to release hose clamps and a flathead screwdriver to gently loosen old rubber connections. The valve fits securely into the valve cover port without requiring complex modifications or extra adapters.
How It Performs in Real Use
For Daily Commuting and City Driving
During stop-and-go driving, a functional PCV valve ensures smooth engine idling at traffic lights. The calibrated spring inside the Mopar 68210345AC responds dynamically to manifold vacuum changes, preventing hesitation during low-speed acceleration.
For Oil Consumption and Blow-By Control
By effectively trapping heavy oil droplets while venting crankcase gases, this valve reduces oil accumulation inside the intake manifold. This stops blue exhaust smoke during startup and keeps intake valves free from sticky carbon deposits.
For Long-Term Engine Health
Proper crankcase venting prevents excessive internal pressure from pushing against delicate oil seals. Installing a fresh OEM valve every 50,000 miles is an inexpensive way to prevent costly oil seal leaks around the crankshaft and valve covers.
Installation and Maintenance Tips
Before installing your new PCV valve, make sure the engine is completely cool. Carefully detach the vacuum hose, twist the old valve out of its rubber grommet or housing, and clean any accumulated oil residue from the mating surface.
Before You Buy: Always check your vehicle’s VIN or consult a Mopar parts catalog to confirm that part number 68210345AC matches your exact engine year, displacement, and trim level before ordering.
Pro Tip: When replacing your PCV valve, inspect the attached rubber vacuum hoses. Heat and oil exposure make rubber brittle over time; replacing aged hoses alongside the valve prevents future vacuum leaks.
Compatibility and Safety Notes
While the Mopar 68210345AC fits a wide variety of Chrysler, Dodge, Jeep, and Ram engines, Chrysler frequently uses subtle valve variations between model years. Verifying fitment using your vehicle identification number (VIN) is essential to avoid purchasing the wrong port size.
Ensure that vacuum hoses fit snugly over both ports after installation. Loose hoses can slide off under vacuum pressure, causing sudden engine stalling or lean diagnostic trouble codes (such as P0171 or P0174).
Pros and Cons
Pros
- Genuine Mopar OEM part ensures exact fitment and correct internal flow calibration.
- Precision-machined exterior finish with ISO 9001 and ASME/ASTM certifications.
- Quick 15-to-25-minute installation using basic household tools.
- Effectively stabilizes rough idling and reduces oil blow-by in crankcase systems.
Cons
- Vehicle fitment is specific and must be verified by VIN prior to purchase.
- Does not include replacement vacuum hoses or clamps if old ones are cracked.
- Will not cure severe internal engine wear or mechanical ring blow-by.
Check Current Price on Amazon →
Is It Worth the Price?
Priced modestly, the Mopar 68210345AC offers excellent long-term value. While aftermarket alternatives might save a few dollars, generic PCV valves often suffer from loose internal tolerances or incorrect spring rates. An improperly calibrated valve can lead to engine fault codes or elevated oil consumption, quickly erasing any initial savings.
Investing in a genuine OEM replacement ensures that your engine’s emissions system operates exactly as engineered. Considering its low cost and potential to prevent major oil leaks or intake sludge, it is a smart, budget-friendly preventative maintenance purchase.
How It Compares to Alternatives
Compared to generic aftermarket brands (such as Dorman, Fram, or Purolator), the genuine Mopar 68210345AC provides exact flow rate matching. Third-party universal valves frequently use generic spring tensions that may pull too much or too little vacuum on specific Chrysler engines.
If you prefer guaranteed compatibility and long-term durability without risk of triggering Check Engine lights, the genuine Mopar valve is the clear choice. Generic options make sense only as temporary emergency replacements when OEM parts are locally unavailable.
Frequently Asked Questions
Does this PCV valve fit my specific Chrysler, Dodge, or Jeep vehicle?
Compatibility varies across Chrysler-family engines. Always verify your vehicle make, model, year, and engine VIN against Mopar part number 68210345AC before purchasing.
Is any additional gasket or sealant required during installation?
No extra gaskets or sealant are required. The valve features standard press-fit or threaded connections designed to mate directly with existing engine ports and vacuum lines.
What maintenance interval is recommended for replacing the Mopar 68210345AC PCV valve?
Most mechanics recommend replacing the PCV valve every 50,000 to 75,000 miles, or sooner if you observe symptoms like rough idle, elevated oil consumption, or sludge formation.
Is this an authentic OEM Mopar component or an aftermarket replacement?
Yes, part number 68210345AC is a genuine OEM Mopar component manufactured to factory specifications for precise fitment and calibrated pressure response.
What are the signs of a failing PCV valve in a Chrysler engine?
Common symptoms include rough idling, increased oil blow-by, excessive oil consumption, oil sludge buildup under the oil cap, vacuum leaks, and occasional Check Engine lights.
Are there known compatibility issues with performance modifications?
No major issues exist with typical bolt-on upgrades. However, heavily modified or high-boost forced-induction builds may require custom breather catch-can setups instead of standard PCV valves.
Should I replace the vacuum hoses when installing a new PCV valve?
It is good practice to inspect connected rubber hoses during installation. If the rubber feels soft, cracked, or brittle from engine heat and oil exposure, replacing them prevents vacuum leaks.
The Bottom Line
The Mopar 68210345AC PCV Valve is a highly reliable, direct-fit OEM component that restores proper crankcase ventilation and stabilizes rough engine idle. Its durable machined construction and ISO-certified manufacturing ensure long-lasting performance in Chrysler, Dodge, Jeep, and Ram vehicles.
While you must take a moment to verify your vehicle’s VIN before buying, the 20-minute DIY installation and genuine factory quality make this part an easy recommendation for routine engine maintenance.
Ready to Buy?
Check the latest price and availability on Amazon before your next maintenance oil change.
