Radiator Leaks
These can occur from the radiator itself or further along the cooling system where they can be harder to spot and harder to fix.

• Split Hose
• Leaking Radiator Cap
• A leak in the head gasket or engine block (water will mix with the oil in this case)
• An external leak in a worn water pump

Some of the parts associated with the cooling system and which could require repair, or replacement are as follows.

• Water Pump
• Thermostat
• Temperature Sensor
• Serpentine Belt or fan belt
• Radiator Fan and heater hoses
• Complete Radiator or radiator cap
• Coolant level and cooling sensor

Radiator Flush
​Over time a radiator can accumulate a buildup of particles and debris, none of which is healthy for any of the components above, this debris can start to cause blockages and restricting coolant flow in the process, this can cause hot spots or even air blockages in the system, all of which stop the cooling system maintaining a normal operating temperature for the engine.

When you have a radiator, flush performed on your car, these will keep the cooling system working properly and will protect all the other components within the engine. Some of the things done in a radiator flush are:

• Inspection of the whole radiator and coolant system for leaks, this may be in the form of a pressure test if levels are low for no apparent reason.

• Flush chemicals are added to the radiator cooling system, these will break down all the deposits which have formed inside and are restricting coolant flow.

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• The fluids in the cooling system are drained and then the correct amounts of coolant and antifreeze are added back to the system, the engine would be run at this point to re-check for leaks and allow the levels to adjust so they can be corrected.

Although some of the problems can be simple, it is highly recommended not to run your car for too long, if you have either a coolant leak or the temperature gauge is constantly high. The problems caused by an overheated engine can be drastic in the long run.