TS99V6

iTrader: (2)

Back in October I noticed oil coming out of the dipstick tube so I did a compression and leakdown test and #7 showed to be bad. I've just recently had the time to pull the motor. (BTW I had to pull the motor from the top since I have a 4-post lift. Pretty damn easy with the QTP lift plate.)



I pulled the #7 piston and noticed some hair line cracks, luckily no damage to the cylinder walls. Once I pulled the rings, the 2 pieces fell out.





I now have the block all tore down and ready for the machine shop. My plan is to just rebuild with forged components. I wanted to go bigger but that will have to wait.

• Wiseco Pistons (flat-top -3.2cc reliefs 3.905)
• Callies Compstar H-beam Rods (6.125)
• ARP Main stud kit
• Durabond cam bearings
• Clevite Main/Rod Bearings

Starkey

Lucked out! That could've been really bad!

Keep us posted on the build.

TS99V6

iTrader: (2)

Yea no kidding! I expected all kinds of damage based on the results from the leakdown test.

DOHCsky

iTrader: (3)

what fuel rails and steam tube configuration are you running?

LS1-450

iTrader: (33)

Is there a question or just noting the event? Good-luck on the re-build.

427LS7HCI

What caused the ringland to fail? boost? spray?

TS99V6

iTrader: (2)

Fast fuel rails, stock steam tube on front and blocked off on the back. I'll be reworking this with the rebuild.

No question, just noting the event. Thanks!

Not sure, no spray or boost. Just N/A.

LS1-450

iTrader: (33)

Most likely high RPM pre-detonation. #7 is usually the first to go. Runs a little hotter & leaner. Connecting rear steam vents isn't a bad idea, but, isn't the best solution. Best solution is to use the highest flowing fuel injector in #7 location. Also, helps to reduce WOT timming a bit.

Injectors get flow tested & marked accordingly. Then, highest flowing injector goes in #7 w/ second highest in #8.