WHAT DOES 4AGE 20V MEAN?

So as an example if someone equipped a Silvertop oil pump on a Blacktop engine then the Blacktop’s timing belt pulley would wish to become rotated 50 percent a tooth even further relative for the protrusion to the Silvertop oil pump. Pictured down below is the Blacktop pulley put on the best on the Silvertop pulley and in a position wherever thei