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Losing coolant! Could it be the head gasket??

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Cassillis:
Hi all; I have a small problem with my disco1 200Tdi 147,000 miles.
Had a water leak from the front of the block some months ago. Stripped it all out and replaced all the gaskets from the block forward, did the cam belt as well while i was in there. The vehicle never overheats and runs at about half on the temperature gauge. Replaced the radiator as the old one was pretty poor but I'm still losing water. No visible leaks no puddles, pools or dripping but the expansion tank is empty every 3-4 days.
Would this point to a head gasket that has gone?

hobbit:
If no obvious sign, one point it may be worth checking is the expansion tank having a crack in it, only leaks when hot and expanded

chris9119:
Graeme

What a bummer......

Check your oil and see if its got water in it......, however, it could have boiled off before contaminating the oil...., white trace elements.....

As said, could be header when warmed up......, could also be water pump gasket or the heater hoses at the back of the engine...., they do have issues with rusting away......

If the team can help, just call.

L90OOK:
Do you get allot of white smoke on startup?
Did you skim the head when it was off & check block for true?  Did you fit a thicker head gasket?
That's allot of water to lose so must be able to find a trace somewhere.  :?

Just a thought...did you bleed the system properly?  An airlock can cause back pressure & push water out the expansion tank.  Does the heater work ok?

peasey:
could be the head is cracked as i had this with a diesel escort a few years back took me ages to work out where the water was going as ther was so much black smoke i couldnt see the white smoke :?  :?  :? do you have any trouble starting it?

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