Failed oil pump?

[3DawgDoug]

Put my '88 300SE on the road after rebuilding the fuel system and I'm right back where I started. The engine was running great then a single "thunk" then the engine died. The engine would turn over but would not show any oil pressure.



Engine oil was full. At this point I suspected the timing chain. So I pulled the front cover off of the engine and inspected the chain. Everything looks good. The guides looked to be in good condition. Chains and sprockets looked good with no obvioous wear.


Short of dropping the pan and pulling the oil pump I'm at a loss. Anyone have any input?