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I have a Range Rover 4.4 petrol 2003 model which is losing water, no obvious signs of leakage however will need to top up within a 2 week period.

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  • 318 Answers

Would advise getting cooling system preasure tested. loosing water indicates external leak. could be in heater box or pin hole in a hose. preasure will find it

Posted on Nov 29, 2012

  • lift_doctor
    lift_doctor Nov 30, 2012

    Have had system pressure tested they say it's ok.

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Posted on Jan 02, 2017

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SOURCE: range rover 2002 model 4.4i petrol engine, every

It appears that you have a minor leak at where a hose attaches to an engine or radiator pipe. When the engine is hot, any small leak will evaporate quickly and therefore not be seen. As the coolant heats up it will expand into the overflow tank but once the engine is stopped the extra heat build up will force the coolant out the leaking joint. As the engine cools, the leak prevents the coolant from being sucked back from the overflow tank.

Check all hoses and clamps including heater hoses and those pesky little bypass hoses in the cooling system for a good tight fit and replace any hoses that have gone hard or have become soft and stretched. Those spring type hose clamps tend to be less effective in clamping as the hoses age. Worm drive ones are the best to use.

If unsure take vehicle to a cooling system specialist and have them do a pressure test and more thorough diagnosis.

If problem persists, then it could indicate a problem with the head gasket (Usually caused by allowing engine to become excessively overheated when cooling system has run dry) allowing very hot high pressure combustion gases into the engine water jacket, which super heats the coolant in the engine block, which then boils off, and is released via the cap or any leaks. If the head gasket is really bad it will leak water into the cylinders and into the oil in the sump. This is indicated by an emulsion of water and oil mix on the dipstick. You will also see white smoke (water vapour) from the exhaust.

Posted on Oct 18, 2010

  • 2 Answers

SOURCE: Range rover 2.5D P38A model. Loss of accelerator

Give me some more information about this problem. May be i can help.

Posted on Jul 15, 2011

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Range rover 2002 model 4.4i petrol engine, every 50-100km, losing 2litres water needs constant topping up. no sign of leaks around head gasket or rad. Inside carpet is dry so not heater matrix. what is...


It appears that you have a minor leak at where a hose attaches to an engine or radiator pipe. When the engine is hot, any small leak will evaporate quickly and therefore not be seen. As the coolant heats up it will expand into the overflow tank but once the engine is stopped the extra heat build up will force the coolant out the leaking joint. As the engine cools, the leak prevents the coolant from being sucked back from the overflow tank.

Check all hoses and clamps including heater hoses and those pesky little bypass hoses in the cooling system for a good tight fit and replace any hoses that have gone hard or have become soft and stretched. Those spring type hose clamps tend to be less effective in clamping as the hoses age. Worm drive ones are the best to use.

If unsure take vehicle to a cooling system specialist and have them do a pressure test and more thorough diagnosis.

If problem persists, then it could indicate a problem with the head gasket (Usually caused by allowing engine to become excessively overheated when cooling system has run dry) allowing very hot high pressure combustion gases into the engine water jacket, which super heats the coolant in the engine block, which then boils off, and is released via the cap or any leaks. If the head gasket is really bad it will leak water into the cylinders and into the oil in the sump. This is indicated by an emulsion of water and oil mix on the dipstick. You will also see white smoke (water vapour) from the exhaust.

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1 Answer

Radiator loses water overflow tank full. replaced cap and no signs of leakage


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