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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
sould valve be bent from broken timing belt
According to Gates Timing Belt Application Catalog your engine is classified as an interference engine. Unless the catalog is in error (catalog errors are not unprecedented and so calling Gates Technical Support is highly recommended) that classification means that if...
Question
I'm unsure about replacing my timing belt.
I agree with your local mechanic and am very sad to hear your father in law has given you such advice. The service interval for the timing belt on your car is every 60,000 miles. Mitsubishi's are known for breaking...
Question
Car runs rough after it heats up.
Hi there. This sounds like there is a minor vacuum leak on the intake. Check the gaskets around the mounting surface of the intake. Check all vacuum lines coming off the intake and see if they are leaking or cracked....
Question
While driving, car jumps into lower gears unexpectedly almost coming to a stop. Then the car jumps back into higher gear at random intervals.
Hi there. Sounds like the kick down solenoid is sticking and not functioning correctly. The kick down solenoid make the circuit within the transmission valve body (transmission controller) to down shift when under heavy acceleration to allow a lower gear...
Question
Auto Zone said the case regulator vail is bad. What is that?
If you are referring to the crankcase pressure regulator valve (CPRV), that valve is a part of your car engine's crankcase ventilation or breather system. A common application is on Audi models. If you have an Audi please note that...
Question
cylinder 3 and 4 misfire
Hi there. Check the spark plugs to see if they have burn spots on them. Switch them out with cylinders that are firing. If the other cylinders do not fire now, then the spark plugs need replaced. If the same...
Question
My timing belt broke, is there a chance there is no damage? 2000 Dodge Neon
Unfortunately, the valves are most likely bent along with possible piston damage. The 2.0ltr in both single and double-overhead-cam configurations are interference engines. The valves and pistons occupy the same space. The job of the timing belt is to keep...
Question
Why can't I find a valve cover gasket to fit my 2005 es330 lexus?
Hi there. When it comes to the gasket replacement on the valve cover to your Lexus, I recommend getting the gasket from the dealership or a parts store that sells OEM parts. Aftermarket seals and gaskets for your vehicle may...
Question
Car is tapping
Occasionally, belt driven accessories are the source of noise so you can try to isolate all belt driven components by removing the serpentine belt and briefly run the engine. If the noise remains, a common source of tapping is the...
Question
Turbo VS. Non-Turbo Valve Cover Gasket
Hi there. Looks like the gaskets are the same for the turbo and non turbo engines. I recommend asking the local parts store for to see a valve cover gasket for the non turbo engine and a gasket for a...
Question
I need to know the purge valve solenoid location and how long it takes to replace it.
Hi there. There are two different locations that the purge valve was located at, depending on the vehicle type. The first location would be on the engine intake next to the throttle body on the left side when viewing the...
Question
Transmission modulator valve is not working.
Hi there. The modulator valve is located on the back of the transmission on the passenger side. The valve is vacuum controlled. So, before you replace the valve, be sure to check the vacuum line from the engine to the...
Question
Carbon buildup on the intake valves.
Sent to CS for billing question on how much it will cost to remove carbon buildup on the intake valves.
Question
I have an error code P0441. It is recommended that I replace the purge control valve. Where is this located and how do I replace?
Hi there. The purge control valve on your vehicle should be behind the engine air filter housing. You may have to remove the air filter housing to get to the purge valve. The valve is held on by a couple...
Question
Car is running crappy sounds like a v8 truck with dual exaust.
If the engine exhaust sounds very loud, there may be a loose or broken component like a cracked manifold or rusted pipe section like on your egr valve. A technician will be able to look over the vehicle listening for...
Question
My car runs poorly when the idle sensor is connected, without it the car runs fine
The throttle position sensor is designed to monitor the position of the throttle butterfly valve in relation to the throttle pedal position. If the engine runs rough when it is plugged in and runs fine when it is unplugged, then...
Question
About every 2-3 weeks the car will just stall, usually when stopped or slowing down. What is wrong?
This may be related to a dirty or failing idle air control valve. The idle air control valve reads the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and at...
Question
Brakes gradually tighten on all four wheels while driving and not applying the brake pedal
Hi there. Sounds like the vacuum check valve on the brake booster is stuck. I recommend replacing the vacuum check valve and the brakes will work normally. If you need further assistance with your brakes sticking, then seek out a...
Question
Would I need to replace the entire valve cover?
Hi there: Oil leaking into the spark plug wells is an indication of a fairly serious problem that should be inspected and repaired immediately. It is almost always due to a failing gasket or O-ring but can also be the...
Question
Found misfire on all cylinders by code reader. I checked vacuum and it was low at 14 hg. I checked compression 160 to 180 except no. 3 cylinder 180 to 270.
Hi and thanks for contacting Your Mechanic. When it comes to a misfire, first check for spark and make sure that the spark plugs are functioning correctly. Then check the fuel injectors and make sure that they are not plugged...

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