Ring gap/forced induction recommendation ***carnage pics inside***
#11
**** Roger that sucks.
Its just so common for 90% of guys here including myself to just throw in stock long blocks and boost em with bolt ons a good tune and have no problems.
But after the whole HotRod mag. 4.8 ring gap article it seems we start thinking about it, and it affected you, i say you had a freak incident.
So you just going to throw a new set of pistons and rod bolts in the girl and get her back on the road?
Your Radix is a bully, picking on poor 5.3 pistons ! LOL!
Any one know what ring gap spec is for the LS9 / LSA engines and what rod bolts they use? This might be a good route to follow.
Its just so common for 90% of guys here including myself to just throw in stock long blocks and boost em with bolt ons a good tune and have no problems.
But after the whole HotRod mag. 4.8 ring gap article it seems we start thinking about it, and it affected you, i say you had a freak incident.
So you just going to throw a new set of pistons and rod bolts in the girl and get her back on the road?
Your Radix is a bully, picking on poor 5.3 pistons ! LOL!
Any one know what ring gap spec is for the LS9 / LSA engines and what rod bolts they use? This might be a good route to follow.
This is the first time I've had something like this happen. When the piston came out, the ring gap was right there where the ring land broke. No signs of pock marks from detonation on the top of the piston either. I'm not saying it didn't happen, but I didn't hear it happen. There was one time that I went WOT with the stereo cranked though, the day before I heard the knocking. By the time the engine was out & apart, the piece of piston had blown out the exhaust. The spark plug gap was also closed up a bit. Compression test was 175-185 on all cylinders.
Tim, good idea on checking GM's specs on those engines. I'll dig around in Mitchell later today and see if I can find anything. GM's spec for the L33 is something like .009-.0196".
I'm gonna borrow a bore mic, verify the block, then I'll probably just buy one new piston from GM, regap the rings, and slap her back together.
#12
Mod with training wheels
iTrader: (16)
Pictures of the ring ends aren't good enough to really show anything, but here's how the ring looked:
#18
TECH Veteran
iTrader: (8)
The one pic has a # 1 piston on it,was that the hole it came from? Usually its # 7 that blows land first,my buddys denai 6.0s same thing happend #7.It beat up the head a little and the bore was fine,we tossed in a new stock piston and the stock heads went back on.Ran perfect,went back stock
#20
TECH Regular
My builder recommends .0065-.007/inch of bore at a minimum in a boosted application, for what it's worth. I think stock on the 6.0s is around .015 total ring gap. I also lost one of the front pistons as opposed to the normal back two pistons except mine broke the oil ringland not the top ringland. I don't have a very high opinion of the stock pistons.
As far as reusing the stock rod bolts- I thought they were torque-to-yield like the head bolts.
As far as reusing the stock rod bolts- I thought they were torque-to-yield like the head bolts.