I was out driving my s13 240 with sr20det around for the first time today I drove it almost a 100 miles I noticed after I stopped there was a tapping kinda noise coming from the valve cover sorta kinda getting a little loud, I think it is VCT rattle but not sure, I need a cheap fast way to fix this problem? and I was wondering if it would hurt to drive it around like that cause this is my everyday car?