Burnt Holes In Pistons??

[daredevil95]

Hi, I have a 86 GN and cylinders 1 & 3 aren't firing. Confirmed I have spark, fuel injectors acting funky on these 2 cylinders. Havn't dug further with injectors since I discovered cylinders 1 & 3 have 30psi confirmed with compression tester. This then made me send my inspection camera into these 2 cylinders and I found the indentations / holes? in the pistons. I attached a small video I made with inspection camera....clearly shows something but, I'm not sure if these are holes or not? Suspicious to say the least? Thanks in advance....gene

 

[BEATAV8]

Dimples:

Buick V6 Piston Guide

 

[Turbo6inKY]

The ring of carbon around the crown tells you pretty clearly the rings are borked.

 

[daredevil95]

Dimples:

Buick V6 Piston Guide

I was hoping dimples but, i checked a good cylinder and it has no dimples....yikes! The mystery continues.

 

[daredevil95]

The ring of carbon around the crown tells you pretty clearly the rings are borked.

Yep, for sure. Looks like engine coming out. Owned car for 12 years so, its had to happen sooner or later. Thanks everyone for the responses.

 

[Mr.Spool]

That's nothing
I've cracked 4 out of 6 cylinders on the stock pistons with 0 on the compression test
Took the heads off
4 or of 6 had the eye

 

[turbodave231]

Those drill marks are on all stock 86-87 pistons. They will be toward the front side of each piston.

Run a leakdown test. It will tell you WHERE the pressure is escaping the cylinder.

I'm betting on Head Gaskets not rings. That can be fixed w/o pulling the engine as long as you don't have head studs.