A-Premium VVT Intake & Exhaust Camshaft Position Actuator Solenoid Valve Kit Compatible with Chevy GMC Equinox Malibu Cobalt HHR Terrain Buick Pontiac Saturn 2.0L 2.2L 2.4L Replaces# 12655421 12655420

I bought the A-Premium VVT Intake & Exhaust Camshaft Position Actuator Solenoid Valve Kit for my 2.4L engine, and it worked perfectly. The parts came well-packaged, looked high quality, and installed without any problems. After replacing the old solenoids, I noticed an immediate improvement. My engine stopped rough idling, acceleration feels smoother, and the check engine light cleared right away. These solenoids are a perfect fit for Chevy, GMC, Buick, Pontiac, and Saturn models—no modifications needed. What I liked: •Direct fit replacement •Cleared engine codes immediately •Smoothed out idle and acceleration •Good build quality •Great value for a complete intake + exhaust kit If you’re having issues with hesitation, rough idle, or timing-related codes, this kit is definitely worth it. Solid parts at a great price.

These camshaft position solenoids fit perfectly and worked exactly as expected. Installation was straightforward and everything matched the original parts with no issues.

Work great! Cleared my P0010-P0011-P0013 and P0014 codes on my 2009 HHR 2.2. Easy install. Great price

The A‑Premium VVT solenoid kit is designed to regulate oil flow to the cam phasers, allowing the ECU to advance or retard cam timing based on load, RPM, and temperature. For engines that rely heavily on variable valve timing, solenoid performance directly affects drivability, emissions, and fuel efficiency. ⚙️ Technical Pros • Accurate oil metering The internal spool valve responds quickly to ECU commands, allowing stable cam phasing under normal driving conditions. • OEM‑style electrical characteristics Coil resistance and connector geometry closely match factory specs, reducing the risk of ECU misreads or intermittent VVT codes. • Good sealing and O‑ring compression The solenoids maintain proper oil pressure without leakage, which is critical for engines sensitive to pressure drops. • Fast cold‑start response The solenoids activate reliably even with thicker cold oil, helping reduce rough idle during warm‑up. • Reduced VVT lag After installation, many engines show improved timing response, especially during mid‑range acceleration. ⚠️ Technical Cons • Spool valve tolerances not as tight as OEM Under high‑RPM or high‑heat conditions, the response time may not be as precise as factory solenoids. • Susceptible to contamination The internal passages are more sensitive to dirty oil; sludge or varnish can cause sticking sooner than with OEM parts. • Heat‑soak performance varies After long drives, some users report slight timing hesitation until oil pressure stabilizes again. • Not ideal for performance builds Engines with upgraded cams, higher oil pressure, or tuned timing maps may require OEM or performance‑grade solenoids. Performance Notes • Idle quality: noticeably smoother once the ECU relearns cam timing. • Throttle response: improved, especially between 1,500–3,000 RPM. • Fuel trims: often stabilize after a few drive cycles. • Check‑engine lights: P0010, P0011, P0012, P0020, P0021, P0022 typically clear after installation and relearn. Installation Tips (Technical) • Clean the mounting bores with brake cleaner to remove varnish. • Lightly oil the O‑rings before installation to prevent tearing. • Verify coil resistance with a multimeter before installing (usually 6–12 ohms depending on vehicle). • Clear codes and perform an idle relearn if your vehicle requires it. • Use high‑quality oil; VVT systems are extremely sensitive to viscosity and cleanliness. Final Technical Takeaway The A‑Premium VVT solenoid kit is a solid mid‑tier replacement that performs well for stock engines and daily driving. It won’t match OEM precision under extreme conditions, but for most vehicles dealing with VVT timing faults, it restores proper operation at a fraction of the cost. If you want, I can also break down: • common symptoms of failing VVT solenoids • how to test your old solenoids • compatibility for your specific vehicle • a more engineering‑level explanation of how VVT solenoids work

😊 I was happy to have found this product for a fraction of the cost than advanced auto, Firestone and the other dealerships. It is too soon to know if the product is valuable as it was just installed and seems to be working fine. Value for money, the size and design are all benefits of this product. The ease of installation was a highlight for my mechanic.

Seem to fit and function as per design

I have no issues with the delivery or packaging of this item. However, after just 7 months the part started malfunctioning. It stranded my vehicle on the side of the road forcing me to get a tow truck to take my vehicle to a repair shop. I understand this is a relatively inexpensive part, but that does not justify the lack reliability. In the end it ended up costing a lot more and even with the part still under warranty I do not want to put the same part in my car and run into the same issue soon after.

Fit perfectly