Ok so i just put a set of gtp heads on my 89 gt. While a had it apart i went ahead and installed an e303 cam(stock rockers(100k miles) and pushrods). When i fired it up it ran and idles fine but it sounds like someone is tapping on the valve cover with a hammer. I removed the v.c. and rechecked the torque specs on them(25 ft/lbs) but the problem persisted. Whats the deal. The noise dissappears after about 2500rpm(dunno if it goes away or i just cant hear it over exhaust) do these heads require longer pushrods? are my lifters not pumping up? little help would be great.
thanks
-saphirestang89
thanks
-saphirestang89