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I didn't see any design changes in them that made them worth the switch, I ordered new LS1 trays when I got mine. By the way, the unfortunately come in packages of "five". Even though the motor only needs four. What a stupid packaging scheme.
If you do change them, check the numbers on the bottom of the trays. Some of the ones that are marked "10" had some issues. I found one in my motor.
I didn't see any design changes in them that made them worth the switch, I ordered new LS1 trays when I got mine. By the way, the unfortunately come in packages of "five". Even though the motor only needs four. What a stupid packaging scheme.
If you do change them, check the numbers on the bottom of the trays. Some of the ones that are marked "10" had some issues. I found one in my motor.
does GM have a TSB on this issue? good information
Not that I am aware of, there were a couple of guys who found this due to the car eating lifters. Turns out the lifters were slightly rotated relative to the cam.