ppardue1 Posted December 8, 2021 Share Posted December 8, 2021 I am working on a B-61 with a END673 in it. Up until now it has run well but I recently put an exhaust on it and the quieter exhaust revealed a popping sound in the intake. I adjusted valve lash and, in doing so, discovered that one of my exhaust valves had severely diminished travel. I took the oil pan off and confirmed that the lifter surface has been damaged and the cam lobe went with it. I've been able to source a new cam and bearings but in looking for parts, I have a hard time finding lifters for the 673 but there are plentiful parts for the E6 engines. It appears that the E6 lifter is the same (save for a slight geometry change on the push rod socket which can be accounted for with E6 pushrods). Can anyone confirm that the E6 lifter (Part number 72GC357) will fit a 673 before I spend a lot of money to find out the hard way? Quote Link to comment Share on other sites More sharing options...
theakerstwo Posted December 8, 2021 Share Posted December 8, 2021 (edited) (501) 565-6700 hillcrestcamshaft.com This located in Little rock I have used two of their cams.Look at their website Edited December 8, 2021 by theakerstwo Quote glenn akers Link to comment Share on other sites More sharing options...
Joey Mack Posted December 8, 2021 Share Posted December 8, 2021 Well... I looked in the book shown, my E-6 2 valve book, and my E-6 4 valve book, and cannot find the lifter part #. The book i posted does have a ton of part numbers for all areas of a Mack and even midliner info. I was lucky enough to have a friend at Mack, who was willing to print this for me.. There is a lot of E-6 part numbers in it... jojo Quote Link to comment Share on other sites More sharing options...
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