REMOVAL & INSTALLATION
The valve guides are not replaceable. Worn guides should be reamed to a maximum of 0.030 inch (0.80mm) using a step procedure of 0.005 inch (0.15mm), 0.015 inch (0.40mm) and 0.030 inch (0.80mm). If the guide does not clean up with 0.030 inch (0.80mm) oversize reamer, the cylinder head must be replaced. After reaming the guides the seat runout should be measured and resurfaced if necessary.