Q:I have put a new pressure valve and replaced both thermostat

so that should have fixed it I wonder if you needed to replace the stats

Q:what are the step i need to do so i can change the valve seals my truck has been smoky.,,, any websites i want todo it myself... 1989 chevy silverado 2500 350 engine 5.7L

First find out if that is the issue. Do a wet/dry compression on all the cylinders. That is where you do a compression test on all the cylinders and write them down. Then squirt about three pumps of oil from a oil can into each cylinder and retake the compressions. If the compressions don't change and are low, the valves are burnt and you need a valve job. If the compressions go way up after the oil seals the rings, then the piston rings are bad and the engine needs rebuilding and that may be where the oil smoke is coming from. If all the cylinders are within 20 psi and runs good, then it may be your valve guide seals are bad. You can replace them without pulling the heads. You can go to an auto parts store and buy a valve spring compressor that is used while the head is on the block. It has an air fitting that screws down into the spark plug hole and when filled with compressed air, holds the valves up while you remove the spring and replace the valve guide seal.

Q:I did a compression check on my 350 chevy. I have low compression of 175psi on one cylinder.The other seven cylinders range from 195psi to 205psi Could the valves be too tight on the cylinder with 175 psi compression?

Chev engines have hydraulic lifters, keeping the valves adjusted correctly at all times. 20 lbs isn't much to worry about anyway, but if you want dump a little oil (about a tablespoons worth) into that cylinder and recheck it. If the compression jumps up, then your rings are getting weak. If not, you may have a leaky valve.

Q:What kinds of butterfly valves are available? What is the working principle of butterfly valves?

At work temperature:(1) high temperature. T>450 degrees C butterfly valve.(2) medium temperature butterfly valve. 120 C<t<450 DEG butterfly valve.(3) normal temperature butterfly valve. A 40C<t<120 degree C butterfly valve.(4) low temperature butterfly valve. One 100<t< one, 40 degrees C butterfly valve.(5) ultra low temperature butterfly valve. T< one 100 degrees C butterfly valve. Www bgfm /df/Divided by connection:1 pairs of clip butterfly valveThe butterfly plate of the clip butterfly valve is installed in the direction of the diameter of the pipe. The valve is fully open.The clip butterfly valve is simple in structure, small in size and light in weight. Butterfly valve has an elastic seal and metal seal two types of seals. Resilient sealing valve. The sealing ring can be mounted on the valve body or attached to the periphery of the disc.2, flange butterfly valveThe flange butterfly valve is a vertical plate structure, and the stem is a sealing ring of an integral metal hard sealing valveFor flexible graphite plate and stainless steel plate composite structure, mounted on the valve body, butterfly plate sealing surface of stainless steel surfacing. The sealing ring of the soft sealing valve is made of nitrile rubber and is mounted on the butterfly plate.3, lug butterfly valve4 、 welded butterfly valveWelding type butterfly valve is a non sealed butterfly valve, widely used in medium temperature less than building materials, metallurgy and mining, electric power production process at 300 nominal pressure 0.1Mpa pipe, used to open and close connected, or adjust the medium quality.

Q:Have an iron block, aluminum heads, solid roller lifters, Jessel rocker shafts, what should my valve clearances be cold, and hot??

Because you apparently have a built engine here rather than a factory assembly which simply has solid lifters, and the data you have is either inconclusive or conflicting then I will recommend the following procedure: Assemble them cold and adjust to Intake .010 and exhaust .020. After firing up the engine, adjust the carb, if it is so equipped, to a smooth rich idle and run it in for a couple of hours mixing idling with moderate load and a few full throttle pulls through 2nd gear to seat the rings. Bring it back into the shop good and hot and set the valve clearances at .008 intake and .016 exhaust hot. After adjusting the valves readjust the idle to 700 RPM and set the timing. initially set the timing at about 2 degrees BTDC until you hav run in the engine, If you are without clear specifications for timing use a vacuum gauge and play with it between 2 and 10 degrees BTDC with the vacuum advance disconnected and plugged, you are looking for the highest vacuum at idle as a starting point. Run it hard including lugging it in high gear at around 2500 to 3500 rpm at or near full throttle, if you are getting spark knock back it down 2 degrees at a time until it does not knock when lugged. If you get no spark knock when lugging it you might try advancing the timing 2 degrees above the vacuum indicated optimal setting but do not go beyond that point. After setting the valves and timing readjust the carburetor to the best lean idle and set to 650 to 700 rpm depending on where it feels comfortable. In the old days a lot of this was done totally by ear - hence the term engineers. Today I think most holders of that revered title do not have a clue where the term came from.

Q:When will Butterfly Valves be used?

3, there are anti-corrosion requirements of the pipeline, such as sewage, chemicals, etc.;4 、 pipes that regulate flow control requirements, such as quantitative systems;5, there are open and close, fast opening and closing requirements of the protection of the pipeline system, rapid cutting......

Q:What do you mean, handle, butterfly valve, hard back and soft back?

Hello, soft sealing butterfly valve is generally divided into skeleton, seat and frameless valve seat, the skeleton of the general material: resin, aluminum, iron.. Etc.. With back seat is on the back of the vulcanized rubber, without skeleton, valve seat is rubber.

Q:Classification of telescopic butterfly valve

(2) temperature butterfly valve. 120 C<t<450 C butterfly valve(3) normal temperature butterfly valve. One 40C<t<; 120 C butterfly valve(4) low temperature butterfly valve. One 100<t< one, 40 C butterfly valves(E) ultra low temperature butterfly valve. T< one, 100 C butterfly valve (1) clip butterfly valve(2) flanged butterfly valve(3) lug butterfly valve;(4) welded butterfly valve

Q:Ok, so I took my car in for maintenance (Mustang GT convertible 2002) and the mechanic told me the valve gaskets needed to be replaced and when he gave me the estimate, they were two seperate charges for valve gaskets and valve covers, total of about $250.00 not including labor. Is he trying to rip me off cause I'm a girl by the way? Anyways, I didn't get it done cause it needed something else too and I didn't have enough money so I said I would be back in two weeks. So I called the dealership to inquire about the price and I asked the parts guy for a price on valve gaskets and he was like, I don't know what you mean, we have valve cover gaskets but nothing says just valve gaskets? I told him to give me the price anyways, thinking I would ask my brother (who hasn't tried to help me anyways) and it was $60.00 for both (I need two). How can this be if the other guy was charging me $250.00 for different parts? Help!!! Frustrated and confused, I don't know anything about cars :(

Your car has 2 valve covers hence,2 valve cover gaskets. Not valve gaskets. Maybe one of the valve covers needs replacing? If the valve covers or gaskets need replacing your car will be leaking oil from under the hood.

Q:16 inches below the choice of electromagnetic valve can be the same, it turned out to be DN200 election 1/4, and now there are DN350 can also use this? With it, limiter, pressure relief valve, locator model will change?

DN200 pick 1/4DN350, DN400 corresponding solenoid valve, you can choose 3/8 hose 12mmOther accessories are related to valve path and pressure. If the same series, the valve has no change at all.