Abstract: A motor mounting means for a centrifugal coolant pump having its own cooling fans has a housing provided with a supporting surface therein for supporting a motor and flanges extending from one interior wall which index a motor and restrain the motor against rotational movement. A cap is secured to the housing by bolts extending through lugs located on the outside of the housing and into posts in the cap so that the size of the cooling fan is maximized. Index vanes within the cap position the cap and abut against a topside of the motor to secure the motor against the supporting surface.