lifters?

[lhkrueger]

There is another possibility. These engines have pistons with short skirts. We tore down a 5.3 (after doing everything else we could think of, bearings, lifters etc) and it was piston slap. A hone out and new pistons solved it. It is common and engine can run a long time without repair.

[thatsmrmastercraft]

Originally Posted by mxhideout

I bought the 6.0 out of a 2500 (same engine base as 5.3) for my drag car project. Was told it had a noisy lifter. I pulled it apart because I wanted to put a bigger cam in it anyway, and to our surprise, a chunk was missing on one of the stock cam lobes. Hopefully yours isn't that bad, but I just figured I'd post it here since we're talking about it.

Wow, that is a strange one.