I have read up alot on this topic and so far this is what i know my cars a 92 s13 has the same problem a rattling comeing from under the valve cover. now with s13 they put 2 timeing chain guides in. They over built the crs only one is neeeded. I have spoke to many people who hae done the following and have had no problems afterward. Get yorself a new valve cover gasket cheap lie 20 bucks. next pull the valve cover off. from what i hear yo should see that little braket everyone is talkin about sitting there it should be laying there lose rolling and rattling around. remove that little bugger and put the valve cover back on useing your new gasket. You dont always need the new gasket but you do in many cases it cheap so no big deal. From what i hear it a very simple fix. i read aolt about this on 240sx.org i will look for the info and give you the links. as soon as i stop being so #### lazy i am gona do this on my car. craig
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