So...I think I broke something
05-15-2013, 09:19 AM
#1
So...I think I broke something So....last night I decided to take a quick look at my LS1 that I pulled last weekend. Pulled it because I thought I had a spun bearing. I wasn't expecting this:
#8 piston
#7
Still had good oil pressure, even was running strong, just made noise, lots of it.
Last Thanksgiving I bounced off the rev limiter 2 times by accident trying to roll out from a burn out. I missed the line lock release switch and it hit the rev limiter before I could get my foot off the pedal. For 20 mins I thought I was fine and drive it home. Next day I start hearing ticking noise. Thought it was bent PR or stuck lifter. Pulled the heads, had them checked, #4 intake valve had to be turned & seated. Reinstalled the heads, new CM PR, and LS7 lifters. Took it for a test drive, on the second time it got so much worse. Limped the car home.
None of the connection rods feel loose (like it would with a spun bearing). I turn the crank a few turns and didn't see anything hitting the pistons.
I'm stumped.
Cam lobe sheered? Timing chain stretch?
#8 piston
#7
Still had good oil pressure, even was running strong, just made noise, lots of it.
Last Thanksgiving I bounced off the rev limiter 2 times by accident trying to roll out from a burn out. I missed the line lock release switch and it hit the rev limiter before I could get my foot off the pedal. For 20 mins I thought I was fine and drive it home. Next day I start hearing ticking noise. Thought it was bent PR or stuck lifter. Pulled the heads, had them checked, #4 intake valve had to be turned & seated. Reinstalled the heads, new CM PR, and LS7 lifters. Took it for a test drive, on the second time it got so much worse. Limped the car home.
None of the connection rods feel loose (like it would with a spun bearing). I turn the crank a few turns and didn't see anything hitting the pistons.
I'm stumped.
Cam lobe sheered? Timing chain stretch?
Trending Topics
05-16-2013, 01:05 AM
#11
TECH Enthusiast
Join Date: Mar 2009
Location: West Chester, PA
Posts: 522
Likes: 0
Received 0 Likes
on
0 Posts
Bounced it only twice?! I've launched my car a few times to have it bounce while I try to regain traction. Unless the previous owner was bouncing it like a ball? lol
05-24-2013, 08:48 AM
#15
this is looking up from the oil pan at the #8 cylinder (top of pic, the one with the damage) and # 7 cylinder (bottom of pic).
The angle is an illusion, the cam is higher then it appears. The damage is the bottom of the cylinder just before the sleeve.
The angle is an illusion, the cam is higher then it appears. The damage is the bottom of the cylinder just before the sleeve.
