I lost the oil pump and chain in my '85 300D TD. After hearing a wierd pop immediately after startup a few weeks ago, the engine got really noisy and I initailly thought it was an exhaust leak. The oil pressure was low but there. Then the engine seized for a half a second and then oil pressure went to 0. I then realized what happened and immediately shut down. Restarted to confirm 0 oil pressure and shut back down. Dropped the lower oil pan and the chain was dangling and had been pulled apart. Upon closer inspection of the oil pump and bottom of lower oil pan knew it was not good. The oil pump shattered from the internal gear, bent the pump drive shaft and chewed up the teeth on the oil pump sprocket. I also found a shattered metal ring and two very long (@8") very small wind springs that I can't identify. Can anyone tell me what the ring is, what the springs are and if the oil pump chain can be replaced w/o 1) pulling the motor or 2) w/o having to pull the upper oil pan and crank pully's and seals off? Any help would be greatly appreciated.