tool for keeping valves up while changing springs

Is there such a tool out on the market besides the air hose fitting for the spark plug? If not, I developed a tool that will keep it up AND allow removal of the springs ect, all while fitting through any spring compressor. I REALLY want to send it off to possibly patent it. Do you guys think there is a market for it? If you could buy one for 5 bucks, would you prefer that to the air fitting/turning the crank by hand? It would save the time wasted removing the spark plugs.

Really depends on the application. There's very little valve stem sticking above my keepers. There's no other way to grab the valve to keep it up while the spring is being depressed to drop the retainer down and remove the keepers. Once the spring, retainer and keepers are off, all that's left is the valve. If something was on top of the valve holding it up, how does the spring get removed.

I'll stick with an air system. There's lots of gimmicky ways to do the job and I'm sure someone already has a patent on some weird tool but holding the valve up with air pressure is the easiest.

You can also take the spark plug out and stuff some rope into the cylinder. Bar the engine over until the piston compresses the rope against the valve holding it in place.

Really depends on how functional and easy to use it is.

Raise the piston to TDC and use wooden clothes pins to hold the valve.

It depends on the engine, but on an LT1, you don't need any tools. Just put the piston at TDC and the valve cannot fall far.

depends on the springs too. Alot of springs you wont get off unless you take the head off.

I wouldn't get my hopes up on anything.

i'm with shoebox the easyist way. and you dont have to take the plugs out!

on my ls1 i just put the piston at TDC....and it gave me no problems.

only one time (towards the last one) did i mess up and get cocky about it....came 1/8" from dropping the valve. i just turned the motor over and pushed the valve back up.

got lucky:bow: