If the engine will start and run, try this: fill the crankcase with non-detergent 30 weight oil and add 2-3 quarts of kerosene or Diesel fuel, enough so the crankshaft and connecting rods will dip down into the mixture and splash it around vigorously. Run the engine at a fast idle (1500 RPM or so) for 20-30 minutes with NO LOAD on the engine- - - -do not drive the vehicle at all. Idle down to normal speed, shut down and drain the oil while it's hot. If the rings are stuck in the ring grooves, this procedure usually unsticks them. Be aware it will also find any places where oil can leak, such as loose sheet metal parts and possibly front and rear crankshaft oil seals. Sludge makes a pretty good sealer, and sometimes that's all that's keeping an engine from being a serious leaker.
Jerry
