Hi. I just replaced the harmonic balancer on my Chevy venture 2001 but it does not start. I already repalced the crankshaft position sensor but it does not start. I´ve already scanned it but it shows any code. As I turn the key on and the starter runs, the engine does turn with no difficulty and with no unusual noises so I suppose the timing chain is ok but I don´t know if there is any chance that because of the harmonic balancer failure, it could skip a theet and alter the timming.

 

Why did you change the harmonic balancer? Was it running before the change? I don't know about the Venture, but I just changed a balancer on a 03 Blazer and the crankshaft sensor is right next to it. Check the wires going to the crank sensor as they might have been damaged.

 

Thank youfor your post. I changed the harmonic balancer because it started to make some noise and then it made a loud crnking sound and the engine stopped but is not blocked. I already replaced the Sendor and checked for a faultyu cable or connection but everthing looks ok. Nevertheless the engine does not start.

 

Harmonic balancer is keyed, can only go on one way. If you have slop with it on the crankshaft, look to see if the key is worn, or wrong size.