09/25/2026
LS HEAD GASKET PROBLEMS AREN’T ALWAYS OBVIOUS 👀
Not every blown head gasket is going to leave coolant pouring out, milkshake the oil, or give you a giant cloud of white smoke.
Sometimes the signs are much more subtle.
A small sealing issue can show up as:
🔹 One cylinder that looks different
🔹 Unusual combustion marks
🔹 Coolant staining or tracks
🔹 A cylinder that’s cleaner than the others
🔹 Compression or leak-down results that don’t immediately scream “head gasket”
🔹 Small evidence of combustion getting where it shouldn’t
🔹 Ballooning of the MLS surface into a coolant jacket from combustion
That’s why looking closely matters.
When we’re diagnosing an LS with a suspected head gasket issue, we don’t just throw parts at it. We look at the evidence … cylinder condition, gasket surfaces, sealing areas, combustion patterns and the test results together.
Sometimes the gasket tells the story, you just have to know what you’re looking for.
Diagnosis first. Parts second.
