REMOVAL & INSTALLATION
These engines do not have removable valve guides. There are 0.005, 0.015, and 0.030 in. oversize valves (stem diameter) available. To use these, ream the worn guides to the smallest oversize which will clean up wear. Always start with the smallest reamer and proceed in steps to the largest, as this maintains the concentricity of the guide with the valve seat.
As an alternate procedure, some automotive machine shops bore out the stock guides and replace them with bronze or cast iron guides which are of stock internal dimensions.