I have a Audi A4 2.6, losing water. Suspect head gasket Any idea's on cost?

Question

Looked underneath and cant see any fluid loss, from radiator / pipes. Where else should I look?

Answer 1

Probably expensive tbh.. although I don't trully know. For something like that, if not under warranty, I'd take to a specialist instead of the stealer (dealer).

I happened to read this yesterday and it mentioned one sign of a blown head gasket:
==
http://www.chris-longhurst.com/carbibles/engineoil_bible.html

When is sludge not sludge?

Easy. When it's an oil and water emulsion from a leaking or blown head gasket. If this happens, you get a whitish cream coloured sludge on the inside of the oil filler cap.
==

Also you might want to do some of the tests to check its your head gasket as mentioned here:
http://wiki.answers.com/Q/What_are_the_signs_of_a_blown_head_gasket

Maybe check the ukmkiv forums.. (I know yours is Audi) as loads of knowledgable people there.. and could perhaps point you in right direction for your A4.

Here is first thread I looked at using search term "losing water".. and there seemed to be quite a few threads.

http://uk-mkivs.net/forums/thread/678045.aspx
http://uk-mkivs.net/search/SearchResults.aspx?q=losing+water+AND+sectionid%3a16&o=Relevance
Good luck.

Answer 2

Get a chemical test done on your coolant system if the head gasket is gone then gas will escape into your coolant this will then be picked up by this simple test.Check the floor mats are not wet this would indicate a leak from your car heater system.Is there any emulsified oil in the coolant ?The scheduled time for both head gaskets is 10.5 hours

Answer 3

Check under carpets in foot wells for any sign of coolant, not unknown for the heater matrix to spring a leak.

Answer 4

400 to800. depends on why gasket went..Overheated? warped head? cracked block??