Engine Repair (A1)Question 2 of 120
Technician A says a blown head gasket can allow coolant to enter a cylinder and cause white exhaust smoke. Technician B says it can cause bubbles in the coolant recovery tank from combustion gases. Who is correct?
a.Technician A only
b.Both A and B
c.Technician B only
d.Neither A nor B
Explanation
A failed head gasket can leak both ways: coolant into the cylinder produces white steam-like exhaust, and combustion pressure into the cooling system produces bubbles and possible overheating. Both technicians describe valid symptoms. A cooling-system pressure test and a combustion-gas (block) test help confirm the diagnosis.
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