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FAQ

I am having a leaky valve is that normal? the doctor said that it is normal what do i do?

Many of us have leaky valves that do not require treatment...only when it becomes more leaky will it cause problems and you would benefit from treatment. Its pretty common to have a slightly leaky valve I had one and so do my 3 sons who are 13, 16, 18.

large veins contain one way valves, which keep the blood flowing in one direction. why dont large arteries need similar valves?

The heart actively pumps blood forward. That keeps it moving in one direction. On the other hand, venous flow is more passive.

I recently broke the valve cap on my tuba and i was wondering if any of you guys knew where to buy a new one or how much it would be.

you okorder has alot of things but i don't know if they sell separate pieces. Best thing to do is to go to your local music store and tell them and let them find you one,

I am being sent for a level 2 Ultrasound Thursday because my previous US showed one of the babies valves was enlarged. She said all 4 chambers were there but she was very vague on what this means. Care to shed some light?

I don't know what this means in a fetus at 20 weeks since a lot of changes still lie ahead, but you can glean some info from the nature of this type of defect in adults. If the abnormality doesn't change and if no other abnormalities arise, the flaps of the affected valve will poke into one of the heart chambers. This situation is called valve prolapse. Look up mitral valve prolapse as an example. Typically a valve prolapse is not a serious defect, but if the prolapse is severe it might require treatment at some point in life or maybe even multiple treatments. What the heart will look like at birth is probably the bigger question. Some abnormalities signal a genetic defect that might cause other problems as well. Some defects cause a chain of problems in later steps of development. Your doc should have a good idea if any of these concerns exist. Maybe genetic testing will be suggested, but many defects occur with no explanation and they do not cause other complications. I would guess that after the chambers are developed, a dilated valve would be unlikely to cause any significant complications in later heart development, but this is just a guess.

why do new motorcycles need to get their valves shimed alot? can someone explain how the whole valve adjusting thing works? why do some engine types require more attention? i have owned thumpers my whole life and never really thought about it. i was looking at this like cheap beater bike (hyosung gt250 v twin) and i read the valves need to be checked like 3 times in a short span, wtf??

Valves have to have some clearance when the engine is cold so that as the stems expand the valves will still close all the way. Most of the wear in the valve train occurs at the valve and seat, as the seat tends to recede and the valve pulls further into the head.(SOHC and OHV designs may also wear in the rocker arms and bushings, which tends to open the valve clearances, usually not as quickly as valve seat wear, however.) As an inevitable result of this wear at the seat/valve juncture, the gap between the valve stem (or bucket or shim) and the cam lobe (or rocker arm) tends to close down. If the gap is too small, the valve may not close all the way when the engine is warm. If the valve does not have enough contact with the seat, it cannot transfer heat away, and may erode. There can also be a loss of compression if the valve cannot close. This wear happens most rapidly with a new engine and the valve clearances tend to close up relatively quickly. As the parts bed in, clearances tend to stabilize. That is why the first one or two valve adjustments are most important.

im trying to turn on my sprinklers from the valve manually,but doesn't seem to work, the valve it's an antisiphon rainbird valve with two little knobs, I know that one is the bleeder and the other the pressure control, or something like that, and the solenoid has the on and off arrows on it, but i can't do it anyways,they come on automatically right on time ,it's just the manual thing that i can't do, please help me,i really need it

MANUAL okorder /

my valve cap is leaking slowing how do i fix it what part do i need

The cap on the valve is just a dust cap designed to keep dirt out of the valve. To determine if the valve is leaking, move the car until the valve is at the bottom pointing up. Put a little water into the valve and watch for bubbles. Bubbles confirm the valve is leaking. You could try replacing the core with a little valve wrench (you will lose all the air in the process) or go to a service center and have them replace the valve. You cannot replace the valve yourself. If no bubbles, you have a leak in the tire or where the tire joins the wheel. Any tire service center can find and fix the leak.

I am trying to shut off the water valves under my sink to install a new kitchen faucet. The hand knobs appear to be damaged (thin soft metal). In addition, they seem to be seized up pretty well. So I can't shut them off by hand and not sure what I can use to close it off without damaging it further. My initial thought is to replace the valves. Any suggestions?

Just shut the water off to the house and then you can change the faucet without having to mess with the valves. If you want to shut off the valves though just use a pair of chanel locks to turn them once you break them loose they will turn easier. If the handle breaks off it no biggy, it wont hurt the valve any, you just wont have handles but they dont work anyways right.