Question about 1990 Nissan Sentra

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Losing water from radiator but no traces found

Losing water such that you add 2litres daily

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If you say no traces that tells me that you have most likely checked out your radiator well for no leaks. 2) You can loose water via the water pump.You can move or turn the pump by hand and if it gives or fills loose in anyway then the bearings are bad in the pump.3) Check your thermostat.The number one reason for a problem such as yours. If it sticks your motor will turn water into steam and you loose it that way. These are the only ways one can loose that much water on a daily basis.
Good Luck, Phil

Posted on Jan 06, 2009

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Posted on Jan 02, 2017

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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.

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Radiator water loss


heat temperature evaporates water, therefore the water level will decrease on a more than daily basis as the vehicle is used. This is just one of the reasons for water loss (or usage). The radiotor drain plug migh be loose or worn. the plug is a white plastic like bolt on the base side of the radiator. Some hoses may be loose, worn or broken. the radiator itself may have a leak somewhere within the accordions. pour in some radiator stop leak.
also try coolant instead of water; coolant has a less evaporative density than water.

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