[san rensho]

Pull the oil filter to check for metal. If there is metal, then drop the sump plate and see if there is any metal debris in there. If there is a lot of metal, well you have problems. If little to no metal, then remove the drive belt and turn the motor over by hand, clockwise only. If there is major damage, you will feel the interference. Don't force anything. I would probably pull the plugs before rotating by hand, it will be much easier to feel interference if there is no compression. If it locks, well you wil have to take the motor apart at that point.

If it rotates easily, I would start by pulling the cam end plugs to check if the cams are still in timing. If its still in timing, pull the cam covers to see if you have a bad valve, look for sheared lifters.

What kind of noise was it making? Was it a deep rapping sound (probably a bearing) or a rat tat tat (probably a valve).



Good luck.