Constantly getting air in coolant

[Jamo]

Guys i'm forever havong to remove air out of my coolant system via the rad bleed screw what could cause air to constantly get in there?
Head Gasket?

[volcano rs]

yes head gasket could cause that problem by leaking into the water jacket

[Jamo]

Anybody want a Audi........... Is there anyway to test the headgasket Jamil?

[volcano rs]

you could get your water system pressure tested ( some top garage should have that equipment )they should be able to tell you for sure

[volcano rs]

are your water pipes getting really hard ( getting pressurized ?) are you losing water ?if not don't worry about it .

[Jamo]

Yeh i'm losing water and today I got the overheat sign come on the dash.

[Jay]

slow down

dont go panicing just yet... due to cavitating and desolved gases (hopefully not combustion ) you will find gas build up at any high points like this...

Do you water loss?

pressurizing of the system?

discoloured coolant?

contamination of oil in water or water in oil?

Overheating?

Heater not blowing hot after a while?

get your car to a garage that can chemical check the coolant for combustion gases altho g12 antifreeze/coolant should change cooler if contaminated by com/ gases I believe

Jay

[volcano rs]

not a good sign if you are losing water. it probably is leaking into your water jacket thats why you are having to keep getting air out .i'd get a second opinion before you take the head off

[volcano rs]

if you have exhaust gases leaking into the water system you dont necessarily have oil mixing with water .unless you also have oil side of the gasket blown too . it just depends on where the gasket is blown from.

[newsh]

Sounds similar to mine Jamo, I'd lose water, air in the system and the top hoses would go really hard, eventually after a thrash the water would come out the header tank cap. head gasket was gone near the exhaust side through into the water jacket. No oil contamination.

Check there's no leaking from down below first though, bottom of the rad etc. Do you have the undertray off? Lot easier to see if you have.

[Jamo]

Sounds similar to mine Jamo, I'd lose water, air in the system and the top hoses would go really hard, eventually after a thrash the water would come out the header tank cap. head gasket was gone near the exhaust side through into the water jacket. No oil contamination.

Check there's no leaking from down below first though, bottom of the rad etc. Do you have the undertray off? Lot easier to see if you have.

Sounds exactly the same as mine, been like that from day one just thought it was an air pocket and bleed the system out. Keeps occuring now and again so it can't just be random.

Would a compression test show up anything?

I've checked for leaks none on the rad / aux rad area. Sumpe area is wetish dunno if thats from the road though.

[Jamo]

not a good sign if you are losing water. it probably is leaking into your water jacket thats why you are having to keep getting air out .i'd get a second opinion before you take the head off

Me? Take the head off?

How much am I looking at for a head gasket change if the worst comes to the worst?

[Dan_s2_coupe]

I have this problem aswell bleed it out once a month and its all ok

it aint the head gasket as that was done not long ago i dont lose coolent just have a air pocket at the top of the rad

[newsh]

Yeah, mine ran like that for about a year till it got real bad, then at Castle Combe I was doing a litre of water per lap...

[s2dude]

Me? Take the head off?

How much am I looking at for a head gasket change if the worst comes to the worst?

Depends where you go totally and also what is done while the head is off.....it should for sure be pressure tested and machined for flatness...and block mating surface ideally as well but not practical with engine in car!!

Also, depends if the problem has done any damage such as corrosion or other damage to any engine parts or anclilleries

All being well average case scenario I would hazard a guess around ~ £500-£600 but i could be wrong!