Burning Coolant

Hey

I have an Iveco stralis, 2016, with a cursor 13 series 2 engine.

Truck overheated just before Xmas due to a broken fanbelt, didnt over heat much just while the driver tried to find a safe place to pull over.

Fast forward to second week of Feb and it's now losing about 3 litres of coolant per 1000km.

I have had the shop check it out, can't find an external leak anywhere, no sign of the compressor being the problem.

I don't really trust the shop guys, but they are thinking a head gasket on the exhaust side causing the coolant to Burn off.

No sign of coolant in the oil, although am waiting on an oil sample to come back to 100% confirm.

Truck is running great, no loss of power, no extra burning of oil.

Truck has been a POS, it only has 750,000km on it, I bought it new. Had nothing but problems with it, but nothing actually to do with the engine, up until now the engine has been the only good thing about the truck.

I am not keen at all in dropping $20k into it for a rebuild, if I did rebuild it, it would be to sell it straight away, I feel bad about selling it the way it is.

If there is no water in the oil or oil in the water can I keep running it?

I am now just topping up with water (not coolant) is this ok?

If I decided to do a quick solution like a gasket sealer into the radiator fill bottle what the best one and best way to do it?

Any advice? If the truck had been trouble free until now I would rebuild it, but the truck has been in the shop more than it should and I do believe it will still have more issues after a rebuild (non engine related)

Thanks

 

No EGR, just has what we call Adblue, which I think is DEF in America, I am in australia

 

Oil sample came back, colant in the oil, was advised to stop running it, oil test took 2 weeks to come back, so it would be alot worse since I did 7000 miles and burnt 7 gallons of coolant during the time I waited for the results

Engine is supposedly still under warranty, until they find away of saying its not covered, dealer has been advised to do pressure test etc, so just waiting on what they can find out.

Top end has coolant in it, but looks undamaged, turbo pressure tested ok, when i last spoke to them they were pulling the pan and then doing pressure test

 

Let's see how it goes, considering they have agreed to tear it down and diagnose after they have received the oil sample back, after they have pulled the computer file from the truck and after they have seen the service history i think it's a good sign.

Also the truck was always serviced at the dealer, which hopefully leaves me in a good position.

 

So, they have taken the head off and sent it away to be tested, no word that it isn't under warranty and I ain't paying for any of this anyways even if they ask.

I am not sure if they will replace the head under warranty or a whole new engine?

If they do find the head is cracked and they replace the head, should I get them to do anything whilst the head is off?

I don't have much experience in this sort of stuff, is there anything I should look out for? Anything I should definitely do whilst the head is off?

Also do they need to test the block? Do they warp and crack etc?