A failed cylinder head gasket is most likely associated with which liner condition?

• A. Rolled liner O-rings.
• B. Cracked cylinder head.
• C. Insufficient liner height.
• D. Turbocharger waste-gate stuck open.

Answer: (C)

The seal between the head, the block deck, and the top of the cylinder liner is what the head gasket relies on to hold in combustion pressures and separate cooling and lubrication channels. If the liner height is insufficient, the top of the liner doesn’t present the proper sealing surface for the gasket. That misalignment means the gasket can’t be compressed evenly or fully around the liner, creating gaps where compression, coolant, or oil can leak. Over time these leaks undermine the gasket’s ability to seal, leading to a failed head gasket.

Other scenarios don’t fit as neatly. A rolled liner O-ring affects the joint between the liner and block more than the head-gasket seal surrounding the liner top. A cracked cylinder head is a separate failure mode that can cause gasket failure, but it’s not the typical cause tied to liner height. A turbocharger waste-gate stuck open is unrelated to the head gasket or liner seating.