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Steel Seal's Guide To Help Tackle The Jargon That Comes With A Head Gasket Repair

Head Gasket

A head gasket is a gasket that sits between the engine block and cylinder head(s) in an internal combustion engine.

Compression Test

This will tell you if your engine has good compression. An engine is essentially a self-powered air pump, so it needs good compression to run efficiently, cleanly and to start easily.

Cracked Block

A crack in the block of the engine which results in a loss of coolant. Check radiator and all the hoses then see if the freeze plugs are still intact.

Warped Head

A warped head could cause oil and coolant to leak out of the engine or into adjacent cylinders, causing your engine to smoke.

Blown Head Gasket

A gasket that has a break between the opening for the cylinder and an opening for the coolant. The coolant will leak into the combustion chamber. This condition can be diagnosed by a loss in coolant and white smoke from the exhaust.

Cylinder Head

The end cover of a cylinder in an internal combustion engine.

Spark Plug

A device for firing the explosive mixture in an internal combustion engine.

Glow Plug

A glowplug (alternately spelled as glow plug or glow-plug) is a heating device used to aid the starting of diesel engines.


The nozzle and valve through which fuel is "injected" into a combustion chamber.

Water Pump

A pump in the cooling system of a car that causes the water to circulate.


A radiator is the part of the engine cooling system where excess combustion heat is lost by means of forced convection using a circulating coolant liquid such as water or a water/glycol mix to affect heat transfer.

Radiator Cap

A radiator cap is a pressure cap that controls the amount of coolant that is dispensed or removed into your overflow tank. A radiator cap that is not secure can force your vehicle to not cool in a correct manner.

Heater Matrix

The heater matrix is a small radiator through which the coolant runs and warms the air which enters the cabin.

Back Pressure

Back pressure refers to pressure opposed to the desired flow of a fluid in a confined place such as a pipe. It is often caused by obstructions or tight bends in the confinement vessel along which it is moving, such as piping or air vents

Combustion Gases

Exhaust gas is emitted as a result of the combustion of fuels such as petrol or diesel. According to the type of engine, it is discharged into the atmosphere through an exhaust pipe.

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Why Steel Seal?

Because Steel Seal simply repairs blown head gaskets, cracked blocks and warped heads and comes with a Lifetime Money Back Guarantee for when in the unlikely event it fails to do so.


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Steel Seal Ltd, Unit 3B Wellington Road, Waterloo Park, Bidford-Upon-Avon, Warwickshire, B50 4JH