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poor metallurgy. not enouugh zinc. poor breakin procedure. lifter not free (enough) to rotate in it's bore. too high of spring psi on breakin. 23 yrs is a long time/alot of history




considering all he did was swapp heads , and an oil change , a lot of those issues really wouldn't/couldn't/shouldn't apply.

Did you have the heads checked out before installing them or just ASSuME they were ready to go out of the box ?


After the horror stories I have seen on here,I had them checked out and was told everything was good.


1969 Super Bee High School car I got back 2004 Ram 2500