2. As shown in the illustration, use a commercially available air hammer driven valve guide pin A modified to fit the diameter of the valve stems. In most cases, the same procedure can be performed using a special tool and a conventional hammer.
3. Select the correct size repair sleeves and refrigerate them in a domestic refrigerator freezer for approximately one hour.
4. Use a hotplate or oven to heat the cylinder head evenly to 150°C. Monitor the temperature with a kitchen thermometer. Do not heat the cylinder head to more than 150°C; excessive heat can cause the valve seats to loosen.
5. Working from the camshaft side, use a guide pin and a pneumatic hammer to insert the valve guide about 2 mm towards the combustion chamber. This will knock out some of the soot deposits and make removal easier. Hold the air hammer exactly in line with the valve guide to prevent breakage of the guide rod.
6. Turn the head upside down and pull the guide rod outward, towards the camshaft of the cylinder head.
7. If the valve guide does not move, drill it out with an 8mm drill bit and try again.
Note. Drill valve guides only as a last resort; you can damage the cylinder head if the valve sleeve breaks.
8. Take out the new bushing (bushings) from the freezer one at a time as needed.
9. Apply a light coat of clean engine oil to the outside of the new valve guide. Install the valve guides on the camshaft side of the cylinder head; use the valve guide installer to set the guide rod to the specified height A of the valve guide B. If you need to install all 16 valve guides, you may need to reheat the cylinder head.
Installation height of valve guides: 18.25-18.75 mm.
10. Lubricate the surfaces of the reamer and valve guide with cutting fluid.
11. Rotate the reamer clockwise through the entire length of the valve guide bore.
12. Continue turning the reamer clockwise as you remove it from the hole.
13. Thoroughly flush the valve guide with solvent and water to remove any chips remaining from the reamer.
14. Check up a backlash between the plug and the valve. Make sure the valves slide in the guide bushings.