Valve guide moved

[outdoorpowermike]

ok now. I've repaired many of these heads in the past. Remove head, the guide has about 3/16" at top of head under spring. You can buy a set screw package at harbor fright. Tap guide back into head this amount, Find the thickest place on head between cooling fins and drill a hole until the drill bit touches brass guide. You will use a small drill bit, and the 3/16 set screw. Tap guide out of head and you will see drill mark on guide. Use a file and put a grove at the drill spot. Tape the hole you drilled on head to set screw size. Align mark on guide with drill hole, and put some lock tight in guide hole. tap guide into head until file mark is seen. Lock tight set screw and thread into head until it touches guide but don't tighten hard. the cyl head is not very thick. Just enough to touch the guide file mark. New head gasket and adjust valves. I never had any comebacks at shop doing this.

 

[sgkent]

be aware that the valve guide is not concentric. Each one is unique, and when the valve seats are ground, that guide angle is used as a pilot. Don't turn the guide if you do the above repair, and do not use something hard like steel to drive it back into position for fear of mushrooming it.