Thought about it - maybe I will try one that I am not using. Only issue with it is the casting is such crap that there are air pockets in it! There are areas that have nasty cavities. I don't think this is aluminum actually - i think it's some other alloy. I dropped my oil filter housing into our hot tank and it had murky grey bubbles pouring from it reacting to the chemical. I put the valve cover in... nothing.Originally Posted by Ross