hi all I own a ae102 '98 corolla at 110,000kms Last night as driving I heard a slight fluttering sound from the engine... I had kinda noticed this since getting the alternator replaced about 2 months ago or so. Once I got home the sound became louder which turned into a knocking sound and then the sound of like a tin can with a rattling marble in it, about 5 seconds passed and the car just shut off. It seemed also the belts were slowing down while this happened.. I checked the oil level and was about half, topped it up and turned it back on and the noise went away. This morning I topped up the coolant, the car seemed to tend to drink up coolant or leak somewhere. The noise started again but I chose not to drive out.. I explained this to a mate and he reckons maybe a spun bearing, bearings near the crank may'be gone or lost? Some sources say maybe clogged oil filter, maybe oil pump? Sad face... I will try maybe upload a video clip of the sound if consistent.. I also have used 10w40 since owning the car at 70,000kms... Some say to use a thicker oil? It's probably thinner for its age but surely not the culprit?