Liner O-ring failure

[Truckdriven]

(06-19-2023 )tree98 Wrote:  O-ring probably didn't fail, it's likely you dropped a liner. Make sure you cut and shim your counterbores.

I had no signs of a dropped liner, no head gasket failure or pressure in the cooling system, when I dropped the pan I didn't even need to pressurize the cooling system to find the leak it was a steady streak running down the outside of the liner, see pic.