[bpu699]

Ovality was within normal...

Oddly, before the rebuild 2 cylinders were down on leakdown... one via the exhaust valve, one via a stuck ring. The others had a 5% leakdown or less, on a 60,000 mile motor...

The two cylinders with the best readings prior to rebuild, now have the lowest. All the pistons and cylinders went back to their original locations. The only thing that changed is new rings... so ovality shouldn’t play a role?

Rings were from our host...

Cylinders were Nickasil scrubbed with scotchbrite.

Googled this, as there really aren’t a lot of posts on leakdown done before a motor is run. Couple threads on pelican with folks getting 20% leakdown before rings were seated. The Supra forums seem to suggest the same, with folks getting 20% leakdown before running the motor for the first time...lots of posts suggesting readings before seating the rings are pointless...

Was pretty surprised to see a 4% leakdown on cylinder #1, as that was previously my worst cylinder with the stuck ring...

Just to be clear, all the cylinders have a leakdown of less than 10%. Pretty amazing on a cold motor with unseated rings...