Chevy 350 pcv valve rattle. I have replaced the plugs, plug wires, distributor, and did a fu...

Chevy 350 pcv valve rattle. I have replaced the plugs, plug wires, distributor, and did a full valvetrain check and valve adjustment just in case. 0L engine. Learn to recognize the symptoms of a faulty positive crankcase ventilation valve, a key emissions system component. Apr 16, 2012 · I have a 350/350 setup with 14 vacuum at idle. Failed valves will lead to potential engine oil leak, a whistle or other noise, or could cause the check engine light to turn on. Three years now and its a very tight reliable engine. Its running a late model Rochestor Quadrajet carb with electric choke. Is it normal or is something not right? I tried replacing the PCV valve with a new one (parts guy Jul 29, 2025 · Learn the key symptoms of a bad PCV valve and how to test it yourself. Oct 24, 2023 · Can anyone recommend a PCV valve part number for a stock 350 Chevy that doesn't pull vacuum at idle. When a PCV valve fails, and the pressure is not released, it can cause several symptoms, such as blowing out gaskets or engine misfires. Truck Model 86 C10, 84 K10 MM7 NP833 option truck, 85 K10. 1999-2007 Chevy Silverado Purge Valve Replacement | P0442 Crankshaft position sensor replacement how to 99 - 06 chevy silverado Another GM 5. Two I tried pull so much vacuum at idle, the engine stalls when I put the trans in gear, like a big vacuum leak. 3L, or 6. 3 Ticking Noise. The symptoms will vary and depend on whether the valve is stuck open or closed. Dec 12, 2025 · A PCV valve is a small, inexpensive, and often overlooked component of the engine. A few days later after the installation I am getting this tapping/knocking noise. It dont bother me anymore. Then, back to the intake combustion chambers, for reburning. Engine Size 350,355;350. In this comprehensive video, I'll walk you through everything you need to know about changing the PCV valve on your Chevy, GMC, or Cadillac with a 4. I have never heard this before. I Jul 29, 2023 · A PCV valve is a necessary part of an engine that allows the pressure that builds in the crankcase to be released. Avoid costly engine damage with these simple at-home diagnostic steps. This isn't just a Nov 11, 2025 · Discover the key symptoms of a bad PCV valve and learn how much a PCV Valve replacement typically costs. Sep 30, 2025 · Is your car stalling, oil leaking, and check engine light on? A malfunctioning PCV valve could be to blame. My daily is a 350 set up much like yours and the pcv rattles like hell too. What is an Engine PCV Valve? The PCV (Positive crankcase The PCV (Positive Crankcase Ventilation) valve is a crucial component in the engine of a Chevy vehicle, responsible for regulating the flow of crankcase gases back into the intake system. If this pressure is not managed, it can quickly lead to engine damage and oil leaks, making the PCV valve a fundamental piece of preventative Jan 27, 2020 · 84,85,86. Aug 26, 2024 · The PCV Valve, uses engine vacuum to pull blow-by gases, out of the crankcase. I've changed the valve out to an AC Delco unit and no change. 8L, 5. I was told I needed a PCV installed by a local mechanic. Mar 27, 2014 · I have a 56 Chevy 210 Wagon with a 355 V8 installed. . Jun 25, 2000 · Has anyone ever had a PCV valve that actually rattles while the engine is idling. I went and bought Jan 6, 2013 · I'm getting valve chatter under load on my stock 290 hp GM Perfomance 350 crate motor. It sounds like lifters contacting the valve cover but when I remove the PCV it stops. It's did it since the engine was new. Dec 4, 2025 · The PCV, or Positive Crankcase Ventilation, valve is a small component designed to regulate pressure within the engine’s crankcase. When combustion occurs, some gases inevitably slip past the piston rings (blow-by), creating unwanted pressure. I changed mine today on my '70 Malibu, 350, and the new one rattles. It's not the lifters on this one either! Jun 11, 2015 · Chevrolet Silverado 1999-2006: How to Replace PCV Valve Among the complex mechanical components that allow an engine to function, the PCV valve is one of the smaller parts but just as significant. I notice the other day that when the car is idling you can hear the PCV valve rattling like a sewing machine. If this valve is clogged in your Silverado, replace it as soon as possible before other problems arise. This replacement is on a 1984 GMC Jimmy with a 350 crate motor. If the cause of your car trouble does end up being a bad PCV valve, consider yourself lucky. A failing PCV valve can have some expensive consequences. wnm wcs rnh yeu wgl vkf jxj pge dfg euc xcw wbm lvu qfh cvf