Why does my Head Gasket keeps blowing? Head Gaskets are put under enormous stress during Engine operation, and failure may be caused by any of the following factors:
Mechanical Forces. The nature of the detonations in an engine creates huge amounts of energy, or Pressure, every time the Cylinders fire. Over time, these forces stress Head Gaskets and can eventually lead to Cracks in the Heads and or Blocks and Cause Leaks.
HEAT. An Engine creates large amounts of heat under operation. A difference in thermal expansion rates between the engine block and head mean the head gasket in between is subjected to high thermal and mechanical stresses that slowly wear the gasket down.
VIBRATION. Natural vibrations from the Engine and those created as the Vehicle is driven down the road also fatigue the head gasket over time. Head bolts, which keep the Head Gasket sandwiched between the Block and Head, can start to weaken, break or stretch (and possibly warp) to allow increased friction and vibration wear. A poor design that lacks sufficient clamping force from the head bolts can also cause failure.
Overheating. Allowing the Coolant level to run low can cause damage to a head gasket. When Coolant isn’t available to pull Engine Heat from the Block and Heads, the extra heat can cause expansion on the head gasket, which often results in a Blown Head Gasket and or Damage to the Heads or the Engine Block.