Someone once suggested I spray expanding foam up my neighbour's exhaust. Apparently if you extend the hose a bit the foam goes all the way to the valve gear. I don't whether this is just a theory or someone's tried it. I've used the foam in my kitchen and it dries to rock.
The ol’ potato in the exhaust trick. Presumably one can’t control exactly when the engine will blow, so it might happen as the person is driving, probably causing an accident.
Someone once suggested I spray expanding foam up my neighbour's exhaust. Apparently if you extend the hose a bit the foam goes all the way to the valve gear. I don't whether this is just a theory or someone's tried it. I've used the foam in my kitchen and it dries to rock.