Did the usual, started the truck to let it warm up before i go to work. Sounded fine for about 10-15 seconds than holy ****, it started knocking/banging real bad for about 10-15 seconds then it faded away. I just knew it was going to lock up on me.The noise faded away shortly. I think my problem is a rod knocking and not piton slap. I'll know Saturday when I drop the pan again. Fingers are crossed that it's just a loose or stretched rod bolt and hoping if so that the crank and all are ok. If I'm extrmely lucky I may be able to just replace the rod bolts.
Everyone keep your fingers crossed for me. I'm usually not that lucky.

 

Good luck ranwalk.
I haven't heard of many lower end problems with these motors,but your making more torque than most.

 

I'd replace rod bearings off any bolts you pull too.

On the up side ... I had a truck with a rod knocking, that ran for a while that way. It shouldn't lock up, it will just slinge one through the block if anything, not to mention really buger up your crank.

 

If it was a rod, it wouldn't go away would it? I still think it is a lifter that is having trouble pumping up. When I put my cam in, I thought my stuff was going to blow up it sounded so bad till the lifters finally primed back up. I still have one on the pass side that takes longer than the rest upon startup.

 

Slinging a rod through the block is an upside???

If it is a rod and can be saved, where is the best place to get ARP rod bolts from??

 

What BIG KID said exactly

 

i have a noise that is way worse when cold and it sure sounds like a rod to me, seth at cmotorsports says his truck has a rod knock also.