i recently had a loud knocking noise coming from my engine so i took the engine out and basically took it all apart and found out that i span one of my conrod bearings and it totally worn the bearing down and has worn the little lip/groove on the crank shaft where the conrod bearing sits and there is signs of wear on the conrod, im just wondering if i just replace the bearings or what i need some advice cheers.if pics would be easier i can get them up tmrw