I am having a wierd knocking/pinging sound coming from what I can tell is the pulley side of the head. I havn't pulled the valve cover yet, but I have good oil pressure I know. Does anyone have some ideas on what it could be? It sounds the worst at about 2000 RPM. I don't hear it at idle or past about 3000 RPM. Thanks for the help.

Plus I need to drive it 220 miles home on sunday, so fast responses would be appreciated.
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