you should read these links and sub links carefully, as it WILL effect your engines long term durability
viewtopic.php?f=52&t=1376
viewtopic.php?f=52&t=181
http://www.chevyhiperformance.com/tech/ ... to_04.html
http://www.enginebuildermag.com/Article ... oning.aspx
http://www.aa1car.com/library/ar696.htm
http://www.cranecams.com/pdf/20e.pdf
side to side movement or slack in the intake guides should be .001 or less on the exhaust .0015 or less and remember to use a micrometer on the valve stem and a small hole gauge on the valve guides not guess here!
http://www.brandsplace.com/0246-sto3m201.html
http://www.brandsplace.com/0384-fow72-472-104.html
http://www.etoolcart.com/browseproducts ... 2-104.HTML
btw BRONZE VALVE GUIDES are usually the best
IRON valve guides are ok, but usually lower quality
knurling valve guides to take up slack with the valve stem is at best a short duration fix, in fact its just a way to prolong the time untill youll need to do the job correctly.
keep in mind proper lubrication with clean oil and correct valve train geometry will almost eliminate valve guide wear issues for well over 100K miles PLUS even with a performance engine, but allow either one to become an issue and your sure to have problems much sooner.
bronze guides hold a film of oil better, wear less and can be sized tighter for a more precise, fit, so the valve will seat more precisely as it closes, it also tends to transfer heat from the valve stem to the heads more efficiently that a looser knurled steel inner valve guide surface
http://www.ferrea.com/catalog/2009/Dom_ ... Guides.pdf
http://www.aa1car.com/library/ar696.htm
http://www.minimania.com/web/SCatagory/ ... ticleV.cfm
http://www.hastingsinc.com/ServiceTips/ ... ciency.htm
http://www.enginebuildermag.com/Article ... oning.aspx
https://www.goodson.com/technical_suppo ... Guides.pdf
viewtopic.php?f=52&t=1376
viewtopic.php?f=52&t=181
http://www.chevyhiperformance.com/tech/ ... to_04.html
http://www.enginebuildermag.com/Article ... oning.aspx
http://www.aa1car.com/library/ar696.htm
http://www.cranecams.com/pdf/20e.pdf
side to side movement or slack in the intake guides should be .001 or less on the exhaust .0015 or less and remember to use a micrometer on the valve stem and a small hole gauge on the valve guides not guess here!
http://www.brandsplace.com/0246-sto3m201.html
http://www.brandsplace.com/0384-fow72-472-104.html
http://www.etoolcart.com/browseproducts ... 2-104.HTML
btw BRONZE VALVE GUIDES are usually the best
IRON valve guides are ok, but usually lower quality
knurling valve guides to take up slack with the valve stem is at best a short duration fix, in fact its just a way to prolong the time untill youll need to do the job correctly.
keep in mind proper lubrication with clean oil and correct valve train geometry will almost eliminate valve guide wear issues for well over 100K miles PLUS even with a performance engine, but allow either one to become an issue and your sure to have problems much sooner.
bronze guides hold a film of oil better, wear less and can be sized tighter for a more precise, fit, so the valve will seat more precisely as it closes, it also tends to transfer heat from the valve stem to the heads more efficiently that a looser knurled steel inner valve guide surface
http://www.ferrea.com/catalog/2009/Dom_ ... Guides.pdf
http://www.aa1car.com/library/ar696.htm
http://www.minimania.com/web/SCatagory/ ... ticleV.cfm
http://www.hastingsinc.com/ServiceTips/ ... ciency.htm
http://www.enginebuildermag.com/Article ... oning.aspx
https://www.goodson.com/technical_suppo ... Guides.pdf