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Author Topic: Strange waterloss  (Read 882 times)

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mr ICE man

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Strange waterloss
« on: 17 October 2010, 11:28:04 »
Somewhere I'm Loosing water,about a header tank a fortnight.just replaced hbv with new genuine part.heater all works great and doesn't leak I can't see where I'm loosing it!any suggestions?? :y
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cem_devecioglu

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Re: Strange waterloss
« Reply #1 on: 17 October 2010, 11:54:50 »
if engine is ok and no misfire,
then there are a some places to check
* oil cooler area
* thermostate area
* water pump
* heater matrix (worst possible scenario) unless you cut the dash
* radiator
* coolant cap (it can leak slowlyso not your case imo)
* behind the engine where the coolant hose connects to the engine
taking plenum off and checking the oil cooler and thermostat area is easy..

there are coolant additive dyes that helps to find the problem..but also if you are not using pure water you can see some traces without them..
« Last Edit: 17 October 2010, 11:57:11 by cem_devecioglu »
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mr ICE man

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Re: Strange waterloss
« Reply #2 on: 17 October 2010, 12:14:46 »
Will check those!I've no misfire or anything and temp is all ok.top right of rad,guessing some sort of sensor has slight rust where hose is.....
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PhilRich

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Re: Strange waterloss
« Reply #3 on: 17 October 2010, 17:51:03 »
Check the coolant bottle for small, sometimes barely visible stress cracks around the fill neck  :y   
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Mr Stud

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Re: Strange waterloss
« Reply #4 on: 17 October 2010, 19:11:34 »
Quote
)
* behind the engine where the coolant hose connects to the engine


is that one easy to check...
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mr ICE man

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Re: Strange waterloss
« Reply #5 on: 17 October 2010, 19:19:32 »
there is crack around the neck,does this make a diference?its small but its there!!
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Entwood

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Re: Strange waterloss
« Reply #6 on: 17 October 2010, 19:42:23 »
Quote
there is crack around the neck,does this make a diference?its small but its there!!


BIG difference .. the system will not be pressurised so 2 things happen ... the water will "boil" at a lower temperature, and the evaporation rate will be high ... (steam from the crack probably) ... its a bit like boiling a kettle ... the water level steadily drops.

New header tank about £30 I think .. :)
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mr ICE man

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Re: Strange waterloss
« Reply #7 on: 17 October 2010, 20:29:34 »
Great stuff!!thanks guys!will get one bought!
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sandune

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Re: Strange waterloss
« Reply #8 on: 18 October 2010, 18:10:03 »
another area is the drain tap ,bottom of radiator  not fully tightened !!!!  :y
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Andy B

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Re: Strange waterloss
« Reply #9 on: 18 October 2010, 18:14:58 »
Quote
another area is the drain tap ,bottom of radiator  not fully tightened !!!!  :y

Be careful. Swinging off the drain tap won't make it seal any better, it seals via the 'O' rings on the body of the tap.  :y


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