[Camarowguy]

Originally Posted by mikeSS

might be a dumb question but i can not remember,is it recommend to change lifters with new cam ?

I would never use stock puffers with an aftermarket cam. That's asking for trouble. They barely hold up under the stock parameters. When you go with aftermarket lifters, make sure it has a snap ring at the top holding the plunger in. If it has a wire retainer that is square, stay away. I'm sure many people has used them and been fine....that's my opinion and I think it's necessary to use the snap ring type.

Sorry you had to go through this op. It's a hard lesson learned and a expensive one at that. I'm just wondering if the rods in these engines are weak. The pics I have seen lead me to believe that are not a durable rod. They sure don't look like they are anyway. Maybe there is some defects in some castings because it seems like somewhere around 10k miles is the magic number that they fail when run hard. Some odd and kind of crappy that gm would build a bad ass engine with a great flowing set if heads and intake system......capable of making insane amounts of power easily.....and throwing in some junk connecting rods. I just acquired another vehicle to drive daily. I'm right at 3k miles on mine. I'm tempted to either build a tough engine or pull this engine and put a good set of rods in this engine along with doing a few other things to it. After seeing these failures, I'm scared to step on mine. Kind of silly when you pay this much money for a performance car.