I have used google and the forum search feature (doesn't work).

My issue:

On my 3rib....I have installed an NST dual row with the same diameters vs my OEM with diferent diameters on it. The belt K050330 will not tighten, installed I also have the NST water pump pulley and an OEM alternator pulley. Should I replace the crank pulley to an OEM type (different diameters) or is the issue with the OEM alternator pulley or should I go with a smaller belt?

Thanks in advance!!

a larger pulley at the crank will increase the speed of the alternator turning, provided the alternator pulley has not been increased also.
a smaller pulley at the driven end of anything (water pump, alternator) will increase it's speed.

Is the NST crank pulley meant to be used with the NST water pump pulley? Is the setup to keep one thing spinning at original speed, while slowing down something else for 'underdrive' purposes?

I'd say change the belts to fit your pulleys. Water Pump / Alternator / Crank is one belt, and Crank / AC / Steering is the other one, as far as I know.


--sarge