Do Head Gasket Sealers Actually Work (FULL 2yr TEST with Engine Teardown)

Summary by Krater

ChrisFix tests whether pouring a bottle of head gasket sealer into a leaking cooling system can permanently repair a blown head gasket, running a two-year long-term test on a Jaguar X-Type across all weather conditions and over 10,000 miles.

From the video

Answers: Can a head gasket sealer in a bottle permanently fix a blown head gasket?

• Head gasket sealer
• Blown head gasket repair
• Engine coolant block test
• Cylinder head warpage
• Engine oil analysis

What it concludes

• A head gasket sealer can successfully repair a blown head gasket long-term.
• Bar's Leaks Head Seal successfully sealed a blown head gasket on a Jaguar X-Type for two years and over 10,000 miles of driving.
• Head gasket sealers do not clog radiator tubes or heater cores when used correctly.
• Using head gasket sealer can cause elevated silicon levels in engine oil, indicating dirt contamination from the sealer.
• A head gasket leak can be caused by cylinder head warpage of just 1/1000th of an inch even when the gasket itself is physically undamaged.