My new project
Drifting
Joined: Mar 2015
Posts: 1,420
Likes: 302
From: CSRA, SC
Man you gotta do at least a little reading. There are hundreds of threads on this thru the years. Long and short of it, on LS7 factory heads the valve guide and the valve hole itself are not exactly concentric. This causes the valve to rock slightly when it opens and closes fatiguing the stem and snapping the valve which then falls into the cylinder grenading the engine.
The titanium connecting rods also wear on each other and send titanium flakes thru the engine. You better be sure LS7 is what you want or get one rebuilt with good heads and good rods.
The titanium connecting rods also wear on each other and send titanium flakes thru the engine. You better be sure LS7 is what you want or get one rebuilt with good heads and good rods.
Thread Starter
Advanced
Joined: Nov 2021
Posts: 59
Likes: 27
From: NJ
OK, I can see by quickly looking around that there is a lot reading to do. I just didn't know where to look first, you just pointed out a very serious problem that I thought was worst than the problem with my C5Z heads, which I only had to replaced the springs and retainers right away. Seems like the LS7 has even a worst track record. Hmmm, seems like the question is wether to get a rebuilt unit or do one myself. I've done a lot of builds in the past but never on the LS platform. This has the potential to be a very expensive project.
Thank you for your input
Thank you for your input
