I+t is not the best video, but if you know what it is, I took it to a family friend that is a mechanic, he rode with me and said it is piston slap, but it seems that happens on a cold start up. it is a 1998 4x4 blazer 4.3 motor. Any help is greatly appreciated. Also, the check engine light is on, one of the sensors for the catalytic converters is setting it off. Could a bad catalytic converter be doing this?

 

Anybody? Any thing I should check?

 

I have been looking for a parts blazer that I can swap the motor, what years will work?

 

need better audio, sounds OK to me.

 

listen around the rpm of 2500-3000, any help would be great.

 

Anybody have the same thing happen?

 

Could it be the torque converter going bad?