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cooling system water loss

harry3

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my 6 cyl engine looses water from cooling system, but only sometimes
theres never any trace of water loss and the system has been pressure tested

does this mean I have a head gasket leak that comes and goes, the head was replaced for the previous owner years ago
those stop leak things dont seem to make any difference
 

detox_nath83

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head gasket leaks dont come and go..
Do u have Milky Oil (white through it.) or is it running rough or excess moisture out your exhaust.
u could have a leak which is leaking onto a hotspot on your engine and is evaporating. either your rad cap is leaking or your overflow bottle has a hole in it...
 

harry3

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have checked all you mention and its all OK, the water just vanishes every so often, the catch tank then the rediator looses water, a mystery
oil isnt watery
water isnt oily
 

rb26dett

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Sounds like you have a minor leak in a heater hose.
 

harry3

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no wet carpets or evidence of any leaks
 
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