My 2003 rover 25 has started using a litre of antifreeze every 2 or 3 days and i've been told it could be the head gasket thats gone is there any truth in this

head gasket has gone but you havent stated if its a petrol or a diesel ,because the petrol one especially does have a bleed thump screw on the heater pipe at the back of the engine but if bleed and still pressurising then its a new gasket but these engine do suffer from head corrosion in the water ports if no antifreeze used and yours could have water ports that have corroded too large to hold ,its a 405 which is a old car now so it may be cheaper to buy a newer model

I take it that the diesel filter has been changed and the air filter.

The cheapest solution would be to check the priming pump on the hand primer near the diesel pump. Prime the pump and then try to start it - does this work? These things sometimes leak air.

Another would be to get your compression tested (although that should already have been done.)

More likely the head gasket--there is no coolant in the intake manifold. This is a big job. I did one recently and it took almost 2 days to replace both head gaskets.

this is normaly a head gasket blowen out across the water jaket

If you are loosing radiator water/antifreeze and you see 'white' smoke out of your exhaust then it is likely that you are seeing steam: this usually indicates that you have a blown cylinder head gasket or have a cracked ylinder head: both situation will cause overheating of your engine. You can also check this situation by waiting until the engine is COLD, opening the radiator cap, refill with clean radiator fluid/water, restart the engine and see if the water as seen in the radiator is violently bubbling. Another condition before even starting the car again is if you see oil/white-brown staining in the radiator fluid caused by cracked cylinder head or gaskets letting engine oil in the radiator circuit. In any case, it is a critical sitation and you should get it checked and fixed immediately.
Hope it helps and please let me know if I have assessed the correct situation.

let it thaw out ,then see if you have popped a core plug ,if no leaks then put in 3 litres of pure antifreeze and then try starting .petrol or diesel because if its diesel then the fuel could be frozen as well

Sounds like a blown head gasket for sure (I just repaired mine in '89 Benz)......use a high quality head gasket repair additive (Bars-Leak works great), you can find this at an autoparts store. Follow directions on the bottle EXACTLY as they are written (very important). Also don't forget to change the oil when you are done (it probably has some water/antifreeze in it.

I’m happy to assist further over the phone at https://www.6ya.com/expert/robert_aad3edb7dfa380b9

You can use a pressure tester on your radiator to see if it is leaking into the engine

yup that would be true

1. Sorry.... I did not see the 2.2 in title. Install the cylinder head with a new gasket. Tighten the bolts in sequence as follows: Step 1: 18 ft. lbs. (25 Nm)Step 2: Plus 90 degreesStep 3: Plus 90 degreesStep 4: Plus 90 degrees
   1. Step 1: 18 ft. lbs. (25 Nm)
   2. Step 2: Plus 90 degrees
   3. Step 3: Plus 90 degrees
   4. Step 4: Plus 90 degrees