Quote:
Originally Posted by NJSPEEDER
i don't see any point in replacing the pistons if there is no known problem. if you want to update the pistons ir isn't worth jsut doing that when you have the engine half apart already, get it checked out and do fresh bearings on everything while you are at it.
johjzjz, i was always taught that cleaning out the lifter bores with emery cloth was all that was really needed. is that good enough ro are you saying that more shoudl be done? i have never had a new cam fail due to a lifter problem before so i thought it was enough.
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its more a debris issue but also what you use -- small specs of sanding material on the cam bearings is not good -- or any place for that matter -- in the days before small ball hones ( we used a brake cyl hone ) yes we did it like that as well cloth and your finger -- its at best partial and usually only gets you finger side slit open nail caught you been their -- we found years back the lifter bore location was also a problen you have no dought seen those redone -- but in my shop we found as well the bottom of the lifer bore was the bad guy, edges will form and than with high spring pressure first time in use, scrape the lifter stoping it in its bore ( debris on it or scraches causing a lock you have seen that as well ) a gaul will apear and lifter will stop turning -- this is the problem it rubs the cam right off -- note i re do a lot of well used race motors and high spring pressure does all kinds of things not seen in a street / redone for race car block motor, maybe i see to much and over do what we do in my shop -- its all about how clean it is when it is fired everything is just ( bull maybe )