Hey guys I need a part number for the ac belt. This needs to be one for a underdrive crank pulley. Thanks

 

You have to call the underdrive crank pulley company to get the part number, or at least the length of the belt you need.

Though, I highly advise against the underdrive crank pulley... they don't have the harmonic balancer on them. D-series cranks are not balanced and require the harmonic balancer in the pulley to protect the crank from shock. Without the harmonic balancer you can develop crankwalk.

 

You have to call the underdrive crank pulley company to get the part number, or at least the length of the belt you need.

Though, I highly advise against the underdrive crank pulley... they don't have the harmonic balancer on them. D-series cranks are not balanced and require the harmonic balancer in the pulley to protect the crank from shock. Without the harmonic balancer you can develop crankwalk.

 

Also the A/C will not work very well on underdrive.

If you really want to do this, you could set the idler about halfway then pull a tape measure around the pulleys to find the circumference of the belt you need.

 

yeah thats what i just did lol thanks though
As far as the underdrive pulley, it wasnt my choice. it was on the car when i got it, and I dont know what brand it is.

 

you should replace with OEM ASAP

 

Ok thanks for that advice. Ill look into it.

 

What are the chances of this crank walk at low RPMS. This is my DD and I dont beat on it unless im pissed at it lol