I have a 90 Accord EX, just looking for some ideas on the problem i'm having... i blew my spark plug tube seals.. i replaced those along with the valve cover gasket. the day they blew the engine wouldnt start after it died out. starts right up now, but when i get to around 2.5k rpm theres a slight knock. just wondering what i should check for.. as far as parts.. adjustment's etc.. any info would be appreciated thanks