Abstract: A method and apparatus for coining a valve sleeve member for a power steering valve. Arm portions of the coining apparatus are spread radially outward into associated oil grooves in the valve sleeve. A hardened coining land deforms corner breaks defined between the oil groove and the inner land region of the valve sleeve. The arm portions are moved radially inward again and the coining apparatus removed from the valve sleeve. Preferably, the coining apparatus includes a tapered recess extending along a substantial axial dimension of the apparatus. The arm portions are separated at one end of the coining apparatus and integrally joined together at the other end. Opposed groove pairs separate the coining lands from one another and facilitate receipt of the coining lands in the associated oil grooves.