1.8 16v doesn't like getting warm ?????

[andyVR6 0]

finally got round to doing something to my second C thats been sat in the corner of the garage for months without been touched. the only trouble is is when it gets up to around 70-80 degrees it throws all of the water out of the header tank and the top radiator hose fills with air. if i remove the return pipe from the radiator to the header it just belows out loads of steam. + the heaters just won't blow warm. i've had every single pipe off and checked for blockages the pumps working fine and up until it reaches 70 the water flows fine, no air in it at all. i've tried allsorts to get it to behave.

 

any suggestions?

[corrado vr6 0]

wot colour is yr cap on your header tank sometimes the o-ring in the old black caps gets twisted inside the cap making it overheat, i had simular problem and was told to get a blue cap from vag not gsf!!

or it could b yr heater matrix

[andyVR6 0]

its blue but it does it without the cap on

[corrado vr6 0]

the reason why it could b overheating with the cap off is because pressurised water doesnt boil so if you havent got your cap on it will boil over

[andyVR6 0]

it does it either way. my first thoughts were headgasket but it runs fine and until it throws the water out it doesn't lose any. its as if theres an air lock somewhere

[dubcharger 0]

it sounds like an air lock,possibly between the thermostat and cyl head, i would replace the thermostat asap as it could be gunked up and/or knackerd, you probably know this allready but when you fill the cooling system up make sure the heater control is set to warm

[andyVR6 0]

theres no thermostat in it now, n ive even bypassed the heater matrix and it sill does it.

[Lufbramatt 0]

you probably know this allready but when you fill the cooling system up make sure the heater control is set to warm

 

wouldnt make any different in a rado as theres always coolant flowing round the matrix, all the heater control does is move a flap in the heater air box that makes air blow through the matrix :wink:

[dubcharger 0]

you probably know this allready but when you fill the cooling system up make sure the heater control is set to warm

 

wouldnt make any different in a rado as theres always coolant flowing round the matrix, all the heater control does is move a flap in the heater air box that makes air blow through the matrix :wink:

 

nice1 m8 i didnt know that about the C', I was thinking of mk2 golf :roll:

[Lufbramatt 0]

:)

 

thats one of the reasons why the matrixes fail so often, cos theyre always under full engine coolant pressure. mine went bang (or hiss lol) in the passat on a nice sunny day last summer :mad:

[Jim 1]

Hm.. it does sound like airlock type behavior. Problem is that running it with the cap off is all I had to do last time I changed the coolant on my car, however we were squeezing the radiator hoses the whole time as the car warmed up to force any air round and out of the system...

[andyVR6 0]

ive tried allsorts to get it to work now and its doing my head in. can some kind person post a pic up of the engine bay showing all the water pipes etc above the gearbox area. when i got the car everything was dumped in a heap in the car. just want to make sure theres nothing missing or routed wrongly.

 

oh and it has got the wrong rad in it too its only a single core out of a golf but i would have thought it would just kick the fans in more often.