Cooling System

Engine thermostat, how to test.

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The engine thermostat is an important component to the engines cooling system, but for some reason, its removed due to over heating issues.
Engineers have proved that the humble thermostat is necessary to regulate a constant and control temperature range to protect the engine from overheating.

This short video, produced by Darren Gow-Brown Virtualmechanic.com.au, demonstrates an easy way to test an engine thermostat.
Even in a perfect environment, the engine of your vehicle works very hard to maintain a desired operating ...

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Toyota Camry 1990 Temp gauge on high

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In all my time is founder of Virtual Mechanic the following issue with a Toyota Camy tempreture gauge reading high after a short drive would make most people think the repair may lead the a costly repair.
But I cannot take the credit for a very good outcome proving that the real problem was a poor earth connection.
It was Neil Gray of Brisbane that found this problem by going to the trouble of locating a vital earth connection that ...

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COOLING SYSTEM – Welsh plugs

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PURPOSE
Welsh plugs are part of the engine block and the head.  When the engine block and head are manufactured, part of the casting process is that these parts have the welsh plugs fitted where the machines are able to enter and then when the casting is finished a welsh plug is fitted to seal off the cooling or oil system.

THINGS TO LOOK FOR
Welsh plugs can leak at normal operating temperature.  When this happens, stop the engine and get ...

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COOLING SYSTEM – Water recovery bottle

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PURPOSE
The water recovery bottle is designed to recover expanded water and store it and when it has cooled down, the water flows back into the radiator.   Check radiator and the water recovery bottle at the same time. It is best checked when the water is cold. 

THINGS TO LOOK FOR
The water recovery bottle is part of the cooling system.  For this reason caution should be taken when checking the levels as the bottle, if warm, is under pressure.  The ...

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COOLING SYSTEM – Water pump

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PURPOSE
The water pump is designed to circulate water around the cooling system when required.  The water pump is usually driven by a pulley that’s connected to a fan belt and it may also have a fan blade attached to it.  The water pump is usually cast aluminium and designed to operate under a temperature parameter of 13-16 lbs per square inch (psi) at normal operating temperature. 

THINGS TO LOOK FOR
A water pump, over time, may start to leak at ...

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