I've finally had enough of the bloody rattling top end...i think theres a single lash adjuster giving me grief and driving me insane....i replaced them all about 1k miles ago....just done another oil and filter....and she still repays me by chatting away...lol........when i did the adjusters i noticed a bit of oil in the spark plug tubes but didnt have new seals at the time....so i'm going to change the plugs replace the valve cover gaskets and spark plug tube seals at the same time...but i have a question guys......the lash adjusters must have an oil feed of some sort....can they become blocked?...anybody know of where the feed is? ...and lastly ,can it be accessed to clean?