Top fill blowing it's lid
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#1349017
(In Topic #165231)
Old Timer
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Hi going out my mind I have a top fill rad on my gti when I fill up with water/antifreeze I run it with the cap off then as the water rises to the top then I put the lid on and the pipes go hard then the gauge goes to 3/4 then blows the seal on the flange on the matrix pipe on side of block done this twice so changed o ring on the flange and changed thermostat even thou I tested the old and worked fine there is too much pressure in the system any ideas before I need a re mortgage for all the antifreeze I'm getting throu
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Old Timer
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top fills are always going to expel water until the level drops, that's why manufactures started fitting expansion tanks.
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Local Hero
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Old Timer
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No oil in water or water in oil May go and get a new rad and use an expansion
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MOTY 2013
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Hello my name is John and I'm a dub addict.
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Posted
Old Timer
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Cheers pal the only thing I can't check is pump and blocked rad as I have no expansion I'm top fill so dont get a jet of water when I rev? Any thoughts
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MOTY 2013
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yeah that bit you'll have to ignore, just check everything else and follow the bleed guide, if the lower hose gets hot as well as the 2 matrix hoses you can be pretty sure the waterpump is ok. then once the stat is open feel the radiator it should gradually warm up all the way along, if it stays cold at the far end its clogged
Hello my name is John and I'm a dub addict.
My wiring diagrams and other documents have moved here:
VAG Documents & Downloads
You'll need to sign into google/gmail for the link to work! (its free!)
My wiring diagrams and other documents have moved here:
VAG Documents & Downloads
You'll need to sign into google/gmail for the link to work! (its free!)
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Settled In
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Are all the hoses getting hot ? if yes then it sounds like a headgasket has gone and is pressurising the system. if the head gasket has gone around the bores the water system can be pressurised, and not mix water with oil and oil with water. thats my bet if its blowing out flange seals
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Local Hero
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sounds like head gasket, i used a topfil on my 20vt and to make it easyer to fil the system i drilled a 5mm hole in the thermostat so it filled the engine side also
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Old Timer
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Sorry I havbt replyed been real busy with work but will be after advise soon
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