Thread: Spun Bearings Turns Into What?

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To repair a spun bearing, you will need to remove the oil pan. In some cars you can do it with the motor in the car and in others you will need to pull it out. If you did spin a bearing, it is probably a rod bearing and you will need to assess the damage to determine what needs to be done to fix it. In general terms you will need to replace the damaged bearing and probably will need to have the crank journal "turned". That means they will machine metal off the journal down past the damage. Then you will need to put a thicker bearing in to make up for the lost metal. This is not a big deal and is done fairly often. Not meaning it is not a lot of work, just that it is not the end of the world, or your motor. Generally if you are going to do one bearing you should do them all. One more thing, if the connecting rods are not damaged, then you can repair it without pulling the top of the motor apart, if the connecting rod is damaged, then you will need to pull the head(s) and piston(s).

Before you dig too far into this thing you need to find out for sure what really happened. Get a qualified mechanic to help you diagnose the knocking sound and to figure out if it is really a bearing problem. How did it happen, did you over rev the motor? Did it run low on oil? What was going on when the knock started?

Hope that helps

Pat