Grizsk
LVC Member
Hey guys,
I'll cut right to the chase.
2002 LS8 sat for a month, and when I went out to start it the battery was shot. It was replaced by the previous owner with a non-vented version, so I picked up a factory battery from the dealer and replaced it.
Then the drama.
The engine was turning over, but not firing. CEL and charging system light. It didnt sound much, if any different when cranking than it did when it was in perfect working order. I began my research and tried the usual unplug the MAF, check fuel pump etc. After a few attempts, I had it towed to my mechanic. He swiftly confirmed fuel, spark, air and compression, and I immediately feared timing issues.
We proceeded by removing the valve covers, low and behold, I was told "the secondary timing chain jumped bank 2." I should note that there are no codes stored on the PCM whatsoever. Mechanic suggested that perhaps changing the battery may have cleared any sort of system cache.
This is where I need your help. Neither of us know all that much about the LS. From what I've read, some say valve/piston damage is a worry, others seem to experience only a rough idle with a slipped chain and that damage is usually seen with a broken chain. I'm currently waiting on confirmation of whether there is any such damage.
It's a bit of a cliffhanger, but I'll post up any new information I recieve. If theres no damage I'm considering a timing system refresh with new chains and metal tensioners.
My question to you is, what are your thoughts? Knowing all that I do thus far, how would you proceed?
I appreciate any input, bearing in mind that I am aware of the fact that if there is valve damage, I'm looking at a replacement motor or a rebuild.
Thanks for reading my novel.
I'll cut right to the chase.
2002 LS8 sat for a month, and when I went out to start it the battery was shot. It was replaced by the previous owner with a non-vented version, so I picked up a factory battery from the dealer and replaced it.
Then the drama.
The engine was turning over, but not firing. CEL and charging system light. It didnt sound much, if any different when cranking than it did when it was in perfect working order. I began my research and tried the usual unplug the MAF, check fuel pump etc. After a few attempts, I had it towed to my mechanic. He swiftly confirmed fuel, spark, air and compression, and I immediately feared timing issues.
We proceeded by removing the valve covers, low and behold, I was told "the secondary timing chain jumped bank 2." I should note that there are no codes stored on the PCM whatsoever. Mechanic suggested that perhaps changing the battery may have cleared any sort of system cache.
This is where I need your help. Neither of us know all that much about the LS. From what I've read, some say valve/piston damage is a worry, others seem to experience only a rough idle with a slipped chain and that damage is usually seen with a broken chain. I'm currently waiting on confirmation of whether there is any such damage.
It's a bit of a cliffhanger, but I'll post up any new information I recieve. If theres no damage I'm considering a timing system refresh with new chains and metal tensioners.
My question to you is, what are your thoughts? Knowing all that I do thus far, how would you proceed?
I appreciate any input, bearing in mind that I am aware of the fact that if there is valve damage, I'm looking at a replacement motor or a rebuild.
Thanks for reading my novel.