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valves

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How to Replace an Exhaust Gas Recirculation (EGR) Valve
The exhaust gas recirculation (EGR) valve can cause drivability problems if it fails and should be replaced to avoid engine performance issues.
How to Replace an Air Conditioning Expansion Valve (Orifice Tube)
Car air conditioning systems need the expansion valve, or orifice tube, replaced if the AC is blowing warm air or the AC system is broken.
How Long Does a Vacuum Brake Booster Check Valve Last?
The braking system on your car requires a lot of pressure. The vacuum booster is one of the main sources of this pressure. This booster will take the pressure that...
How Long Does a Vent Oil Separator Last?
The engine in your car can only run when the right number of controlled explosions are performed. During the explosions, there are a number of gases that are produced that will...
5 Commonly Overlooked Vehicle Maintenance Items
Brake fluid, auto transmission fluid, and coolant flushes, as well as cabin filter changes and valve adjustments, are all important services.
How to Replace an Air Pump Check Valve
The air pump check valve allows air into the exhaust system. It also prevents exhaust gases from reentering the system during a backfire or failure.
How to Clean an EGR Valve
The EGR valve is the heart of the emissions system on an engine. EGR is an acronym for Exhaust Gas Recirculation, and that is exactly what it does. This wonderful...
How to Change a Radiator Valve
A radiator valve allows coolant into the radiator in order to cool off the engine once the coolant has reached a certain temperature.
How to Inspect Valve Clearance Adjustment
The term “valve adjustment” is an oxymoron. What is actually being adjusted is the clearance between the linkage of the camshaft and...
How to Replace a Positive Crankcase Ventilation (PCV) Valve
A positive crankcase ventilation valve improves emissions in modern engines. Signs of PCV valve failure include oil leaks and poor engine performance.
How to Troubleshoot and Replace a Leaking Valve Cover Gasket
Valve cover gasket leaks usually start when not much oil leaves the engine. It should be repaired before it causes serious damage and costly repairs.
How to Replace a Car Combination Valve
The combination valve balances your brake system. If broken, it should be replaced to ensure a safe driving experience.
How to Replace a Vacuum Brake Booster Check Valve
Brakes are assisted by the vacuum brake booster check valve that fails when the brake pedal is hard to press, feels spongy, or does not work at all.
How to Replace a Power Steering Control Valve
Some common signs of a failing power steering control valve include a power steering fluid leak or the smell of burning power steering fluid.
How to Replace a Proportioning Valve
The brakes on the rear wheels may lock up when the brake is applied especially when surfaces are wet if the proportioning valve is failing.
How to Check an Idle Air Control Valve
Idle air control (IAC) valves regulate the engine idle speed. Engine idle speed is the revolution speed of the engine when the throttle is inactive.
How to Replace Your Car Idle Air Control Valve
The IAC valve, or idle air control valve, dictates your vehicle’s idle. A faulty valve can lead to rough idling and stalling, among other problems.
How to Replace a High Pressure Safety Valve
High pressure safety valves help the car engine run smoothly. Oil filter housings can burst if high pressure relief valves are stuck closed.
How to Replace an Air Diverter Valve
Car air diverter valves add clean air from the air pump to the emissions system to push out pollutants. Air valves are critical for car performance.

Related questions

Question
Tick in drivers side gets lower after warm up
In your initial question, I did not know that valve damage occurred as a consequence of a failed timing belt replacement. The 4 valves that the shop "claims" were damaged might merely represent what they "think" was the extent of...
Question
Variable valve timing
The protocol depends on the codes that have set, which are quite varied. Problems with these systems on your particular model and year can stem from blocked oil passages to failed solenoids to wiring harness issues, not to mention mechanical...
Question
Hello, I have a 2011 chevy Cruze that beds the valve cover replaced. I already have the part. Will you please email me a quote for
Hi, I will be glad to help you with this. If you already have a new cover, the required service is valve cover gasket replacement as that service already includes removal and re-installation of the existing valve cover and, in...
Question
Is it expensive to replace the valve seals?
The usual symptom for bad valve stem seals is bluish white smoke out of the exhaust pipe when the engine is started cold. The smoke usually clears after a minute and doesn't return again until the car is shut off...
Question
Replace Canister Purge Valve.
Billing question was sent to CS for the cost of labor to install a canister purge valve in the fuel system on a 2010 Ford Fusion with a 4L-2.5L engine.
Question
Valve cover gasket 2012 Ford F-150
Hi - Here at YourMechanic, click here for guidance on how to make this repair. There are many other aftermarket sources for information on how to replace valve cover gaskets: the factory Ford Service Manuals, vendors of aftermarket service manuals...
Question
Tail pipe sucks in at times, sucks in a dollar bill
If you have an engine that is running rough and misfiring and the exhaust is sucking in sometimes then you may have an exhaust valve that is sticking open. You should have a compression test to the motor. The valves...
Question
Engine cut while driving, now dont crank.Cant turn it with hand.
Of course, first confirm that the plugs are correct for the engine. The wrong plugs, and/or missing crush washers, can cause interference with the piston. If the plugs are correct, the cause of the mechanical interference can sometimes only be...
Question
Valve guide seals 2006 BMW 750i
Hello - unfortunately, this is not a service YourMechanic.com can offer at this time. Thanks for thinking of us though!
Question
1999 Dodge Ram 1500 sport 4x4
If you didn't change plug wires, cap and rotor, those could be causes. Also, the distributor itself would have to be tested. As far as the fuel injectors, you just want to be sure they are actually getting a signal,...
Question
Hello, I have a 1997 Nissan Maxima and it has no compression reading from cylinder #2.
Hello. It is possible that you have a bent valve but instead you may have a warped valve seat. Whether or not that is the case what is most likely causing the lack of compression in your engine is a...
Question
I have replaced the break pads, calipers, and rotors on my 2003 ford explorer. My breaks keep locking up. I have also replaced the master cylinder.
Check the combination valve on the brake system. If the valve is sticking, then the fluid could be getting trapped and not returning. To check this valve, loosen the brake line on the back side of the valve (the side...
Question
Were is the passenger side vvl on 2006 Forester
Hello, thank you for writing in. Standing on the passenger (right) side of the vehicle, you will want to look under the air duct between the intake and the air filter. Below it you will see two connections. One is...
Question
Valvetronic operation on N42 engine.
The valvetronic motor is stuck or not functioning properly and causing the engine to not start up. I recommend replacing the valvetronic motor. The motor is designed to cycle itself when turning on the ignition, so it is good to...
Question
Need advice on replacing a missing purge valve on a 2000 ford mustang
Hello, thank you for writing in. With a repair guide or manual to walk you through the process, you should be able to make this repair with a few common tools. With the old one removed already, you should be...
Question
Is it bad to drive a car that needs a valve adjustment?
Hi there. If the valvetrain is out of adjustment or the lifters are stuck and making a tapping noise on the top of the engine, then that could damage the engine when driven. I recommend changing the engine oil and...
Question
I have a 1998 Honda Accord 2.3 and when I first bought it , it had issues shifting gears and it would rev up 1998 Honda Accord
Hello - this is a challenge, since you have multiple serious problems. The P1259 problem is most likely what is putting your engine into "limp mode". P1259 in a Honda is a problem with the variable valve timing mechanism of...
Question
Engine has a clicking sound at the front of the motor. Continues to click and seems to get quieter when accelerating 2009 Honda Odyssey
Hi there - your Odyssey engines valve train is adjustable, and requires an occasional adjustment, or you get a bit of clicking as you have noticed. Make sure the proper engine oil is in the engine, and that there is...
Question
Well my valve cover gasket blew off as I was trying to start my van it broke into 2 parts I was just wondering why it did that it 2000 Ford Windstart
Hello - your Windstar has composite plastic valve covers, as do many engines these days. While being lighter and less expensive to manufacturer, they tend to get brittle with age and heat cycles. A momentary surge in crankcase pressure, or...
Question
Whats the best way to fix a low compression valve?
Hi there. When it comes to having a loss of compression in an engine, there are 4 locations that can contribute to the leak. Locations: Bent or burnt intake valve Bent or burnt exhaust valve Hole in a piston...

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