Video: How To Replace A Faulty Passenger-Side Check Valve in a C5

So one day you’re just motoring along in your C5, enjoying the mellow rumble of the LS1 under the hood when suddenly that ominous orange glow from the dash catches your attention. Your CHECK ENGINE light is on. Yay… So you wheel on down to the local auto parts store where they pull the code for you. It’s the all too common P1416, meaning it’s time to replace your passenger side check valve in your A.I.R. system. Sure, it doesn’t have much if any effect on how your Vette runs, but if you even remotely care about keeping your car emissions legal, you really should start making plans to fix it.

This video we found on YouTube isn’t the most exciting thing you’ll see on our site, but it will be a huge help to you when it comes time to replace the passenger side check valve on your own C5. The C5 has two check valves; one on the driver’s side that is easier to get to, and one on the passenger side that is located between the intake manifold and the firewall that is way, way more difficult to get at.

Normally the only way to get to it is to remove the intake manifold and fuel rails, but this video proposes a bit of out-of-the-box thinking, suggesting that you simply cut the lines leading up to the bad check valve, abandon the bad one and leave it where it is, and simply tee into the AIR system and put the check valve somewhere else by using another driver’s side check valve line. Genius!

Check out the video for a step-by-step “How To” and save yourself quite a bit of time, money, and frustration.

About the author

Clifton Klaverweiden

Clifton has been a car fanatic since his late teens, when he started the restoration of his '67 Camaro. He considers himself a student of automotive science and technology, and particularly loves all things LSX. And, although he has an appreciation for everything, from imports to exotics, his true passion will always be for GM musclecars.
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