Hi, if you mean making it as part of your map you can do 2 things:
1. Spawn a prop_physics using the entities tools and change the world model to something made of wood like a crate.
2. Make a brush face (a normal solid block, using the block tool) and press "Ctrl + T" or click tools, tie to entity and select func_breakable then choose the settings you want.
The only in game editors for portal are these 2 which I can think of: 1.garrys mod (not really much of a game EDITOR) 2.Valve's hammer editor, where you can create your own levels for more or less every game on steam (although im not sure and its very complicated)
Source SDK's Hammer editor is used to make all valve produced games such as CS:S, HL2, Team Fortress, L4D and more Go to www.devloper.valvesoftware.com
When a valve is closed quickly the flow of water is interupted causing a water hammer. A water hammer arrestor or air chamber can be used to absorb the hammer.
Any quick closing valve such as a solenoid can cause hydraulic shock waves
Spray wd40 or equal and tap valve "gently" with a hammer while "gently" appling turn pressure on valve.
To release air that cause water hammer
sudden stopages of flow by the closure of a valve
They use a vacume to raise the hammer while simultaineusly using it to move a valve which lets the air in again and causes the hammer to fall. I think.
Through the spark plug hole, soak the valve with penetrating oil. After sitting a while, tap lightly on the valve stem with a hammer. If after several tries this does not work then the head will need to be removed to see why the valve is stuck.
It's a pain. You need to pull the valve cover, remove the timing belt and the camshaft over the stuck valve, and tap the valve real lightly with a hammer to unstick it.
It's probably valve. The valve team also has steam. Inside steam you can use the level/map editor to design a new map with stuffs!
take off the valve cover put on new gasket then put cover back on you if you cant figure it out you should be hit in the head with a tact hammer.