1990 GMC 1500 Pickup Q&A

1990 GMC 1500 Pickup Question: rod bearings

My #6 piston rod keeps spining its rod bearing. What could it be? -
Answer 1
What do you mean it keeps spinning? I assume you replaced the crankshaft the first time around! If you didn't then there lies the problem. -
Answer 2
It is probably the cam shaft if so it will need to be pulled and have it sanded -