that happened to me, but my van woudnt kick over. turns out the guy i bought the van from threw a big cam in and didnt upgrade the rest, so the rod snapped inside the block, it was bent into a ''L" shape, and everytime i tried to kick it over it would bang around. now i cant even use the block, big chunks missing out of the block at the the bootmom of the cylinder wall. so if i were you be carefull. it also might be a fly wheel bolt got loose it is banging aroung in the pan, that also happened to me, check it to be sure.