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valves

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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 Valve Cover Gasket Last?
Among the most important parts of any engine is the oil that is contained within it. There are a variety of moving parts that depend on the oil for lubrication. The...
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...
How Long Does a Positive Crankcase Ventilation (PCV) Valve Last?
Your car’s engine operates by mixing air with fuel and then burning it. This obviously creates waste gases. Most of those gases are routed out of the engine, through...
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
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 2010 Ford Escape vibrates a lot. There are no leaks at all. What could be the cause?
If the vibration happens when you're stopped at a red light, then it's more than likely caused by a vacuum leak, or fuel or ignition system component failure. Typically, the first three parts that would be inspected are the idle...
Question
How to remove driver side valve cover
Hey there, thanks for writing in. The reason you cannot get the valve cover off is likely due to the intake manifold needing to be removed before the valve cover will clear enough to get it off the engine. If...
Question
Keeps leaking bad from cover & seal
Depending on the engine you have I would say you may have a leaking intake seal on the back of the engine block where the intake and block meet. If you can see an active oil leak from one of...
Question
Why doesn't my 2005 Ford Mustang have a valve cover gasket? When I went to replace it there was none on the pan?
Hey there. There is no known Ford Mustang engine I know of that does not have a gasket for the valve cover. Some engines will use a bead of silicone all the way around. You will need to clean out...
Question
My car has idling problems that come and go
The biggest problem with inconsistent engine idle issues is trying to diagnose them. However, there are a few other components you haven't listed that might be faulty. The first is the throttle position sensor. It's likely your Mitsubishi has an...
Question
Loss of power - 2006 Infiniti G35
Hi and thanks for contacting YourMechanic. Since you are getting different sensors acting up, check all of the connections to all of the sensors and make sure that there is no missing bolts. There could be a vacuum leak causing...
Question
Do I have to use the exact type of valve stud on my CRV?
Hi there - Honda uses metric nuts/bolts/studs, so any stud with the same metric dimensions will be suitable, regardless of engine manufacturer. Remove one of the remaining good studs for measurement, or simply take one of the good ones in...
Question
Timing chain broke, is my car not fixable now or do I have bent valves?
Unfortunately, your engine - as most engines today - is what is considered an interference engine. The timing belt/chain is responsible for keeping the internal engine parts moving in the correct time. Interference refers to the fact the intake and/or...
Question
Where is the variable valve timing located?
Your variable valve timing consists of more than one component, so I need to know exactly which component has failed. The most common failures are the IVT (Intake Valve Timing), control solenoid, and the camshaft phaser. The solenoids are mounted...
Question
Valve manifold is stuck
Hi there. The only thing that you can do is remove the upper intake manifold runner control and replace it with a good used one or a new one. If you need further assistance removing the intake manifold runner control,...
Question
I started my car this morning and went to put it in drive. As soon as I took my foot off the brake to give gas it shut off completely.
This may be related to a couple of possible things. There is a component called an idle air control valve that monitors the air intake as it is mixed with fuel prior to being injected into the engine at low...
Question
My truck runs for a few seconds then dies
When you have low fuel pressure but recently replaced the fuel pump and relay, the issue is typically vacuum-related or caused by a clogged or worn out fuel injector. The vacuum issue may be related the the EGR valve or...
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
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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