Head gasket replacement
A failed cylinder-head gasket has recognisable signs: unexplained coolant loss, bubbles in the expansion tank, white exhaust vapour, emulsion on the dipstick and engine overheating.
Symptoms
- Bubbles in the expansion tank, white exhaust smoke, emulsion on the dipstick, engine overheating.
What's included
- Before repair, we confirm the diagnosis with a chemical test of the fluid in the expansion tank to rule out error. Gasket replacement includes checking head flatness and grinding it if necessary; otherwise the new gasket will fail in the same way. We replace single-use bolts and follow the tightening sequence and torques. After repair, we bleed and pressure-test the system. Cylinder-head gasket replacement in Kyiv always includes a head-flatness check.
Additional checks
- Replacing single-use head bolts to the correct tightening sequence
- Bleeding and pressure-testing the system after repair
Why it matters
The diagnosis is confirmed with a chemical test of the coolant, to rule out a mistake. The head's flatness is always checked: if it's off, a new gasket will blow just like the old one did.
More details
A blown head gasket shows recognizable signs: coolant disappears with no visible leak, bubbles appear in the expansion tank, white steam comes from the exhaust, there's emulsion on the dipstick, and the engine overheats. Before starting the repair we confirm the diagnosis with a chemical test of the fluid in the expansion tank — this rules out a misdiagnosis. Replacing the gasket isn't just disassembly: we always check the head's surface flatness, and grind it if it's out of tolerance, otherwise the new gasket will blow the same way. Tightening is done with new bolts if they're single-use, following the correct sequence and torque. After the repair we bleed the system and pressure-test it. We replace head gaskets in Kyiv with a mandatory check of the head's flatness.
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