Hi all. I might have the chance to get a 08' Caddy 6.2. I've heard these are prone to droping valves.

What would be a easy fix? I'd prefer not to have to remove the valves for wightweight pieces.

Would switching to a quality aftermarket valve spring be a solution or must the heavy valves be replaced ???

thanks,
Jim

 

ok. so I've read the locks are supposedly the cause of failure. Maybe the valve itself according to one post. Any suggestions would be great. Thanks

 

I've been told the "BeeHive" Springs **** themselves if you give em to much therapy..

 

the one engine failure Ive seen broke the valve at the bottom of the keeper.
I have not seen another one, Im kind of surprised that this motor has such a bad rep.
I work at a obama motors dealership and rarely work on these.

 

Is this an issue with the GMPP L92 heads too? There's a lot of guys here running them, but I don't recall hearing of them having problems.

 

The main cause of valve train failure is loss of control. Properly setup I don't think the L92 heads are any more prone to failure than any other stock component head. I run stock L92 valves and have for about 15k miles. I also run PAC 1521 springs, Manton 11/32 pushrods and YT Ultralight rockers - all setup properly. My cam has .660 lift so it's not like the system is unstressed.

 

Is this your "little" cam? Doesn't sound that little anymore.

I run the stock valves on my L92 heads to 7k all the time. I use the stock rockers with Patriot xtreme dual springs. About 7-8k miles so far at .600 lift.

 

I ran the stock LS3 valves on Comp 921's/stock rockers w/ a 231/243 .617/.623 115LSA cam for 10k miles with no issues. Matter of fact, I even had a TC failure and almost all the valves hit the pistons and the 2 piece welded hollow stem intake valves just bent and did not break. I think these valves are much tougher than people think and would wager that most valve failures come from valve float or a production flaw.

 

Dropped alot of jaws at the dragstrip, but never any valves. I know I am pushing this motor hard. 12.50's in a 6000+ LB SUV on 24's.

 

good info!