Is the pcv supposed to fit loose on the valve cover? And how do you remove the pcv itself?
I never had a problem with the pcv before. But I'm changing sparks and coilpacks and I needed to remove the intake manifold, so I had the room to check out the pcv and hoses. When I got back there, I noticed the pcv valve fit a bit loose on the valve cover. So I proceeded to try and remove it and the thing won't budge. Any suggestions?
My car has 130000 miles.
My car has an automatic transmission.
Experienced mechanics share their insights in answering this question :
The PCV on this engine has a lock tab and unscrews from the valve cover. The tab may break when you try and remove it so make sure you have the correct one before you try and remove the old one. It will have what looks like threads on the bottom of the valve and will screw into the valve cover with a half turn and locks in place. To remove it, lift and turn counter clockwise and pull out. It will have an O-ring to seal it on the valve cover. If you end up needing some help with this, consider YourMechanic, as a certified technician can come to you and assist you with servicing your PCV valve.
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The bad PCV valve may not close all the way, so oxygen may get into the combustion chamber. When this happens, the fuel and air mixture is diluted causing your vehicle to run poorly and lean out.
The PCV valve regulates how much vacuum can pull through the crankcase. It`s hooked into the intake – when the vacuum is high at idle, the PCV valve stops most of that vacuum. As vacuum drops with an increase in RPM, The PCV valve opens, to allow a higher volume of gasses and pressure to be pulled into the intake.
You can typically find it attached on a valve cover at the end of a hose or tube in your engine. If you shake your PCV valve and hear the metallic rattling noise of it opening and closing, it is likely working well. If it doesn`t make noise, it`s possible that gas deposits have gummed up and sealed it close.
The PCV valve hose may have a leak in it, which is causing the hissing sound. Leaving this for too long can cause misfires, rough running, vacuum leaks and you will have a more extensive repair on your hands.
Poor fuel economy can signal the existence of a PCV valve issue. Oil leaks are another sign of a bad PCV valve. When the valve is clogged with deposits it doesn`t allow the blowback pressure from the cylinders to dissipate, over-pressurizing the crankcase and potentially leading to oil seepage.
A Positive Crankcase Ventilation (PCV) system regulates the vacuum pull through its crankcase. Once the vacuum gets higher than desired at idle, the PCV valve shuts off and stops that vacuum. The drop in vacuum leads to an increase in RPM, which in turn allows more gas to be pulled in.
A PCV valve that`s stuck open will allow too much air to enter the intake manifold, leading to a leaner idling fuel-air mixture. Stuck closed leads to a build up of pressure in the crank case which creates a variety of oil leaks! And this in turn can lead to a range of issues, including a rough idle.
What the PCV system does is it draws fumes from the oil pan back into the intake manifold and burns them to reduce emissions and to protect the inside of the engine. That means that we have to have a vacuum source that sucks the fumes out of the valve cover into the intake manifold.
A typical PCV system should be pulling about 1 to 3 inches of vacuum in the crankcase at idle. If you see a significantly higher vacuum reading, the intake manifold gasket is probably leaking and pulling vacuum on the crankcase.
Installation position of the PCV valve on the cylinder head. In vehicles with turbochargers, power loss, rough idling, or whistling noises are indicators of a defective crankcase ventilation system, MAHLE Aftermarket reports.
A PCV valve that`s stuck open will allow too much air to enter the intake manifold, leading to a leaner idling fuel-air mixture. Stuck closed leads to a build up of pressure in the crank case which creates a variety of oil leaks! And this in turn can lead to a range of issues, including a rough idle.
Specifically, if the PCV valve malfunctions, or is stuck open, it allows some of the oil that is used to lubricate the pistons and cylinders to escape. This wayward oil can then find its way to the surface of the engine`s spark plugs, resulting in a condition known as “oil fouling.”
A PCV valve that`s stuck open will allow too much air to enter the intake manifold, leading to a leaner idling fuel-air mixture. Stuck closed leads to a build up of pressure in the crank case which creates a variety of oil leaks! And this in turn can lead to a range of issues, including a rough idle.
Can a PCV valve cause a misfire? Yes , a PCV valve can cause a engine misfire. A bad PCV valve can over regulate air or often come apart will cause false manifold air leaks that is a unregulated air vacuum leak. False air leaks can cause too lean of a fuel mixture conditions to the engine cylinders to ignite.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
Is the pcv supposed to fit loose on the valve cover? And how do you remove the pcv itself?
ANSWER : The PCV on this engine has a lock tab and unscrews from the valve cover. The tab may break when you try and remove it so make sure you have the correct one before you try and remove the old one. It will have what looks like threads on the bottom of the valve and will screw into the valve cover with a half turn and locks in place. To remove it, lift and turn counter clockwise and pull out. It will have an O-ring to seal it on the valve cover. If you end up needing some help with this, consider YourMechanic, as a certified technician can come to you and assist you with servicing your PCV valve.
Please help me figure out where my PCV valve and PCV Hose is!!!
ANSWER : Hi there. The PCV valve is located on bank 1; the valve cover closest to the cabin. It is usually found under the intake plenum towards the passenger side of the vehicle. The hose will be attached; or loose. Please understand that a code retrieval and an internet search is not a proper diagnosis as there are several other possibilities that can cause the code to set. Some of the possible causes could be spark plugs, ignition coils, intake manifold leaks, intake plenum leaks, vacuum hose leaks, failing airflow meter, failing O2 sensors, exhaust manifold leaks, low fuel pressure, failing ECU, faulty wiring harness, failing injectors, etc… As you can see, the list of possibilities runs on and on. This is where the expertise and experience of a qualified technician with the proper diagnostic tools and procedures becomes invaluable. I strongly suggest having a qualified technician perform an inspection to avoid replacing unnecessary parts and determine the exact cause of the code. Your Mechanic has several available technicians that can assist you with a check engine light inspection.
I have oil smoking out of my oil dip stick and oil filler on my valve cover. Lots of smoke coming out of my PCV valve
ANSWER : Hey there. Worn piston rings create more crankcase fumes (i.e. the smoke you see coming out of breather tubes and orifices). This is called "blow-by". As long as the PCV valve stays clear, and the engine can handle the fume/clean air & fuel mix, then you should be fine.
This is a normal stage of wear as long as tailpipe blue smoke doesn’t become excessive or offensive. The rough running at a stop light may be an early indication of too much blow-by, although those 6 cylinders engines had trouble with rough idle/low speed because of the big differences in the distance between the carb and each cylinder (Cyl 1 & 6 distant, cyl 3 & 4 very close). Keep it tuned, and watch for slow degradation in low-speed running. If you notice this problem worsen or would like to have this checked, then have a qualified professional from YourMechanic come to your car’s location to inspect the smoking problem and follow through with repairs.
2012 chevy cruze lt 1.4 valve cover vacuum leak. waiting on parts in the mail.
ANSWER : It is possible to temporarily seal air (vacuum leaks). Any method that best creates a seal can be used. In particular, RTV sealant which is flowable can be used to seal a non moving crack so long as the surface that you are applying the RTV to is oil and dirt free (otherwise the RTV wont bond). The only concern with such temporary (or even permanent) repairs is that you do not get any foreign matter in the engine through any crack that you are trying to seal. If you want the PCV valve and/or the valve cover replaced you can request PCV/valve cover replacement service and the responding certified mechanic will get this taken care of. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.
I have a 2001 Toyota Tundra 4.7 V-8. When replacing the valve cover gasket, what should I torque the valve cover back to when rein
ANSWER : The valve cover bolt is tightened to 60 inch pounds.
Do u have to remove the timing belt for remove the valve cover? 1994 Ford Ranger 2.3L
ANSWER : Hello – normally, no. The valve cover gasket can be replaced without getting into the timing belt components. Having said that, replacing the valve cover gasket is a great opportunity to make sure the cam seal isn’t leaking oil onto the belt, and to check the condition of the belt. For assistance, I recommend a valve cover gasket replacement performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, and give you an accurate assessment of damage and cost estimate for repairs.
I want to replace the front bumper cover and have removed 4 bolts. It is loose but will not come off and seems hung up by tow hooks.
ANSWER : You’ll have to take a good look around and behind the bumper. There are more than 4 fasteners holding the front bumper cover on the car. You must remove the lower splash shield and loosen the fasteners hidden behind there too. Consider hiring an experienced technician like one from YourMechanic who can come take a closer look at the bumper cover and offer more hands on assistance.
Oil leak from lower valve cover
ANSWER : You didn’t say whether you have the 2.4L or 3.3L in your Hyundai, but neither of these engines have a lower valve cover. Could it be that you misunderstood the part the shop said needed to be replaced? Anyhow, it’s always good to have an oil leak repaired as soon as possible. However, it will be OK to drive your car until your finished moving, as long as you keep an eye on the oil level. Depending on the severity of the leak, you may want to check your oil as often as once a day. A good mechanic will clean the engine off, then put dye in the system to determine exactly where the leak is coming from. This ensures the correct repairs are made. YourMechanic can perform an oil leak inspection for you.
