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Message: [QUOTE="lincolnlocker, post: 992704, member: 944"] I havn't put an actaul lpo gauge in, but hpop reservoir is never empty and my icp values are dead on what they always have been before and after the rebuild.. the rebuild kit was from clay at riffraff anx included a new lpop.. All the issues started around 6k miles on the rebuild.. I have a boost gauge plumbed into the ebps tube via a T fitting and when boost is between 15-20 psi it will thump through the exhaust bad enough to make the 1/4in teflon tube I'm using for plumming the boost gauge hit stuff or hop.. and its intermittent, as in, doesnt do it all the time and I woukd assume a bent valve would thump non stop?.. I started to have cps issues a month or so later.. I had a original black cps in for 100k or so miles that i put in shortly after i bought it and that was the first to die.. put in my second original black cps that I bought the same time as the first, lasted 3 hrs.. put in the recal gray cps that was in the truck when I bought it, while I ordered 4 cps's from clay(which are motorcraft) and it lasted a couple weeks... then I put one of the new black cps's in and it lasted a month or so while my brother was driving it to and from work(he drives slower than my gramps) so I know it isnt from beating on it.. . It now has another new one in it and the last time I drove it at Christmas it started acting up again so I parked it and put a battery tender on it.. I have had the valve covers off twice looking for bent pushrods or broken rockers and valve springs.. no luck.. so without having the awesome tools to check internals, I was just going to pull the motor and double check everything and replace lifters while doing it.. its not like the head gaskets are seasoned with only 6k on the rebuild.... sorry so long and thank you tons for the input!! can you maybe explain how the process works with the edj length pushrod and why it needs to be adjustable? I haven't really gotten into hydraulic lifters much and would like to know the exacts and how to's of how they work.. I got the gist of it but not the exacts... Op, sorry to hijack your thread... live life full throttle [/QUOTE]