Q:I opened the OPD valve on the BBQ propane tank and propane spray out, I have heard that propane should come out only when it is hooked. Is there something wrong with the propane tank?

== it is correct that when the valve is opened without being attached to the BBQ machine it will spew propane gas into the air .... the tank is fine and you noticed the foul odor to the gas and that is put into the gas so you can detect that there might b

Q:Are these valves are a kind of heart chambers pressure sensors?What is keeping them interlocked 2x2?

It's all mechanical. The valves are passive things kind of like a screen door. When you push on them from one side they open, when you push on them from the other they close. The valves are assisted by some fibers attached to the inside of the heart similar to the way a screen door is helped by a spring attached to the door frame. It's the flowing blood that pushes the valves open or closed as the heart pumps. The path that the blood follows in the heart as it beats happens to make it so that the valves close two at a time. This is because the heart is actually four separate pumps that work two at a time. There's no direct electrical connection to the SA node. The only way they're connected is that the SA node firing is what causes the heart to pump, causing the blood to force the valves open.

Q:Exhaust valve opening (EVO)Intake valve opening (IVO)

HI You answered it your self... exhaust valve opening (EVO) is when the exhaust valve opens.. and the same for the intake (IVO).. When the EVO happens the motor pushes the exhaust (burnt fuel) out of the motor when the IVO happens it sucks gas into the motor to get burned and make power.. Exampe of a 4 strock motor. 1) piston goes down , sucking in air and fuel (IVO) 2) piston goes up compressing the air and fuel spark plug fires ignighting the fuel 3) piston goes down turning the crank powering the car from the explosion of Fuel. 4) piston goes back up pushing the spent fuel out. (EVO) then repeats. On a 4 cylinder car this happens 4 different times on an 8 cylinder car 8 different times and on 6 cylinder car 6 different times. When one cylender is firing another well be coming up to push out its spent fuel and another well be going down drawing in fuel and so forth.. good luck tim EDIT IVC = intake valve closes EVC= exhaust valve closes

Q:after my hot water tank shuts off about 1/4 cup of water comes out therelief valve. i changed the relief valve. the tank is 6 months old

Do you mean the heating (burner or heating coils) shuts off. If that is the case then you may need an expansion tank. If there is a reverse flow valve at your meter (most locations now require this feature to prevent back flow of water to the main line.) the pressure in your system can build up higher than normal when the hot water tank is heating. Most systems have a small expansion tank installed near the hot water heater to deal with this problem.

Q:If someone is not born with heart valve disease... can a teenager or a 12 year old develop heart valve disease?

Yes, anyone can have heart valve disease. It is unlikely though. Usually if a 12 year old has an abnormal heart valve, then it is secondary to a congenital heart defect (something they were born with.) Infection of the heart valve (endocarditis) can occur in any age group and lead to an abnormality in the function of the valve involved. Rheumatic heart disease is also possible, but not common in the developed world since the regular use of antibiotics. Good luck.

Q:Ok i just be nt a valve on my 97 eclipse gst. I did a compression test and all my other cylinders were at 175psi which is good(thank god).My 3rd cylinder is only at 25psi.My mechanic will do the installation of the new valve but his friend has to do a valve job and re condition the whole head. Just because i guess your suppose to re condotion and clean the whiole head when this happens. What do u think a ball park estimate would be for this kind of work?I think he is going to replace all of the valves and seals y hes got the head off. The car has 100k on it and there is nothing else wrong with it. The guy i bought it from put a brand new bosch alternator and waterpump in and it also has a new timing belt so i dont have to worry about it skipping on me. WHAT DO YOU ALL THINK WHAT I SHOULD DO? HOW MUCH WILL IT BE? IS IT WORTH RECONDITIONING THE WHOLE HEAD? THX ALOT FOR YOUR INPUT.

1500+

Q:sprinkler valve leaking

Most valves are either 3/4 or 1 with female connections. Use the same size male adaptors with teflon tape wraped around the threads and screw it into the valves. Take a photo before you start to refer to when rewiring.

Q:My fortuner stalls without warning, but restarts quickly, according to Toyota service center, we need to replace the suction valve, can someone please tell me how a suction valve work

you need to be more specific. there are 100 things on a car that could be called a suction valve. Right off the top of my head the only valve that could do that is a EGR valve. If it gets stuck open the car will stall, but it will start back up after the valve closes again. The OBD will tell you if the EGR valve is bad, but other than that I can't say.

Q:Can I make a heat pump straight A/C ?Or some hints how to replace the reversing valve without reclaiming freon

problematic thing. research from search engines like google. just that can help!

Q:We have a 2008 grizzly 700...Lately when we run the 4-wheeler there is a ticking like noise (as is something were loose). I have been told by a few people that it sounds like the valves need adjusting. Does that sound like what it is? Will it cause any damage to the 4-wheeler if we ride it before we get a chance to adjust the valves?

They are correct. Well almost. The Rockers are what can be adjusted. They are too far away from the valve and are starting to hammer on them instead of just moving them. You will not cause immediate damage by riding it but you could wear out the rocker completely and drop a valve into the engine which would be very costly. Best to get it repaired soon. Make sure they install new rockers and springs. The main cause for this is poor oil maintenance or poor grade of oil being used. Always use a GOOD synthetic oil and your motor will last 10 times as long