Valve guide help

[assault187]

I was checking out my head and noticed that the valves have a bit of movement when extended (cams installed) How much movement is normal? At what point should I replace the valve guides? What type material is best for replacement valve guides? and last but not least, what specs should I abide by if I were to replace the guides? I found a valve guide height of 19.5 - 19.9mm from the top of the valve guide to the spring seat and valve to guide clearnace at .02-.05mm intake and .05-.09mm exhaust, are these accurate specs?

I have researched the subject and didnt find much but I did read that bronze guides wear much faster then the OEM guides....any idea how much faster?


I know it alot of questions .....Thanks for the help

 

[assault187]

could someone atleast tell me how I can measure the I.D. of the valve guides?

 

[eagle_talon90]

To measure the I.D. of the valve guides using a small bore gauge and a micrometer, measure the top and bottom of the valve guides, this will give you the bellmouth wear for the guide. There will be a spec for max wear allowed, but that I don't know offhand. You can measure the diameter of the valve, the valve guide i believe should be about .002 or .003 bigger than the valve, again, those numbers may be a little off.