Posts Tagged ‘valve’
What to Do When the Bleed Valve is Broken
Written by Staff on Thursday, January 13, 2011 | Comments Off
Categories: FAQ, Valves Tags: bleed valve, valve
The process of bleeding the car brakes enables the brake pedals to function well and this is achieved through the use of the bleed valve, which releases air from the pressurized fluid in an automobile. The bleed valves may break as some part of the brake system is being fixed. The valves also get worn out when they are opened and closed. Forceful braking may as well damage the bleed valves.
The brake pedals need to be firm in order for them to operate well. If the brake pedal has a spongy feeling, then check the bleed valves to see whether something is amiss.
Once you have determined the wheel whose bleed valve is faulty, you need to dismount it. Then release the caliper from the rotor in order to access the bleed valve.
Check the bleed valve to determine whether it is broken, in which case you will need to replace it. Use a blowtorch to heat it gently for about thirteen seconds. Heat it evenly by passing the blowtorch from side to side.
Place the caliper in a container of cold water for some seconds and then dislodge the bleed valve after loosening it with a screwdriver. Ensure that the replacement bleed valve fits well.
Get into the habit of checking the state of your brakes before you drive your car. Simply start the engine and pump the brakes. If the brake pedal does not feel firm, then check the problem first.
A diverter valve is a simple device that comes in handy if you would like your shower to have more than one shower head. For example, you may be interested in installing a hand-held shower in addition to the overhead shower. You can use the hand-held shower for washing particular areas and soaping up. It is the shower diverter valve that makes this possible.
The shower diverter valve is fixed before the shower head and the additional shower head is fixed on the diverter’s remaining side.
Although shower diverter valves operate a bit differently, the principle behind them remains the same. A button or lever is included with the diverter valve. Pressing the lever or button to the right may allow water to flow to the overhead shower while pressing it to the left lets water flow to your hand-held shower. This is just an example and the lever may also operate on the opposite way, where pressing it to the left operates the overhead shower and vice versa.
It is fairly easy to install a shower diverter valve. You just need to unscrew the shower head, fix the diverter valve, and then fix back the shower head. You should then fix your hand-held shower on the remaining side of the diverter valve.
Many internal combustion engines use a piston engine technology known as variable valve timing. Variable valve timing involves opening and closing of the engine’s control system, timing the valves in different combinations to generate the necessary amount of energy for acceleration. The technology was introduced in 1998 when it was used in Ford pick-up trucks.
Different poppet valves are responsible for the exhaust and intake combustion stages in internal combustion engines. Cams found on the camshaft drive the valves by opening them for a given period during the exhaust and intake process. The timing depends on the rotations per minute of the vehicle’s engine, which controls the cams. Adjusting the timings results in the acceleration required and it is the variable valve timing that makes this possible.
There are various techniques used in variable valve timing that different automobile manufacturers employ in enhancing the engine power of their respective vehicles. Honda developed a system that is known as Variable Valve Timing and Lift Electronic Control (VTEC), which combines electronic and mechanical processes. The variable valve timing system that Mitsubishi uses, on the other hand, is known as Mitsubishi Innovative Valve timing Electronic Control system (MIVEC).
Although different automobile manufacturers use different variable valve timing techniques, they all aim at using as little fuel as possible to get maximum power.
A Positive Crankcase Ventilation valve forms part of the system that controls emissions in environment-friendly automobiles. Many modern cars have PCV valves on the engine’s valve cover.
The Positive Crankcase Ventilation is a one-way valve, which means that it allows substances to flow in one direction only. The PCV valve takes partially burned gases from within the engine’s crankcase and returns them to the combustion chamber so that they can be re-ignited. As a result, the engine will run more efficiently without producing too much exhaust emissions.
The Positive Crankcase Ventilation valve is made of either plastic or metal and is shaped like a cylinder. On its upper end is a connection for a small hose. If you would like to remove the valve, then use pliers to grip it and then tug it gently from the valve cover in an upwards direction.
If you would like to locate the Positive Crankcase Ventilation valve on your 2000 Chevrolet S10, then look for a small hole on the engine’s valve cover. You will notice a small component that protrudes out of the valve’s cover, onto which a small rubber hose is attached. This hose attaches to the Positive Crankcase Ventilation valve.
There are a few reasons that a valve will have become burnt. Having one is indeed a serious engine problem. When a valve burns it means that a part of it has melted away. This can be caused when the cylinder will not seal properly anymore. A burnt valve is one of the reasons you end up with a dead cylinder.
Why do valves burn is the question that should be considered first. It has to do with the number of miles that have been traveled. The parts that are in motion are also under tremendous heat. The heat and motion combine to wear down the melted in the face and seat. This is where the exhaust valve releases a great deal of heat. As the parts become worn this heat weakens the metal which eventually becomes brittle and flake off. It is like a chain reaction the more heat the weaker the metal, the weaker the metal the more heat gets generated. The valve begins to leak and you loose compression.
Because it allows unburned fuel leak into the exhaust the HC levels will increase. High hydrocarbon emissions are a sign of a burnt valve. This could also be because the valve lash was not properly adjusted so it is left hanging open. The truth is that almost any conditions that cause overheating could result in a burnt valve.
The best way to really test for a burnt valve is to get a compression test. After the test is complete if the emissions are high proceed to a visual inspection.
