My 23 year old propane cooktop has a slight gas leak around the valves- I have a gas leak detector and it goes off when I approach the valve/manifold area. I can't pinpoint it so I was planning on replacing all of the valves and valve switches. Do you recommend replacing the manifold also? Looking at the diagram of the burner valve(AP4088331)- it does not look like it is threaded on the manifold side- how is it connected to the manifold and what is the screw used for in the picture? I also noticed there is a left valve and a right valve- what is the difference because they look exactly the same on my cook top and in the diagram. Any help would be appreciated.
Answer Chuck, If you haven't yet, you also need to check the regulator and piping to the manifold under the cooktop in front of the down draft plenum. We wouldn't expect you to need the manifold 74006155, but you will need to remove it from the compartment in order to replace the burner valves and switches, You will need to be careful disconnecting the tubing from the valves The valve body and the brass nut is pretty soft material and you can damage them easily. The valves are two different sizes and need to be installed in the proper left or right position. The left bay is designed to be used with the "E" burner/grill so the BTU rating to the left side is a touch larger than the right side to accommodate the open flame. The valves are not threaded into the manifold, The screw in the picture is the method used to mount the valves to the manifold. The screw is inserted and screwed into the bottom of the valve from the bottom of the manifold. The screw has a rubber gasket mounted to it, to form a seal to the manifold. Once you've got everything installed toy want to rechecl all the fittings for gas leaks again.