I really like my toes unscalded. But I also really like the ability to see out of my windows. Is there actually any real danger removing this valve? I mean, we are driving cars without airbags, we are pretty much dare devils by modern day standards anyway...
Their is absolutely no need to run these valves after a Matrix swap! a new Matrix is made to a far higher standard than the old line fitted items, and is not likely to burst like the earlier versions!
Proof being that the OP's Matrix is only leaking, and not burst, just like everyone else's that comes on here, and other Forums...
However, I would only recommend removing the valves AFTER fitting a new matrix, just on the unlikely off chance that the Matrix is still the factory fitted item!
Thom