Have they given it a " sniff test " to determine head gasket on its way out?? albeit i would tend to agree with them in my own experience in the past on cars showing same symptoms.
To busy to check it out apparently just told me to book it in for a HG change, so I have sent away for some gear to test it myself.
Maybe they just don't want the job buddy so it's most likely best to try and determine yourself. It was my local AA chap who used his sniff test tool on one of my cars a few years back which showed the problem as an on its way out head gasket.
Done a sniff test (twice) liquid remains blue! Also the UV water/oil test, water cap lit up day glow orange dip stick and oil cap not a shimmer?
Done it, tried the water cap first(to make sure the kit was working ok) lit up day glow orange, oil cap and dipstick not a glimmer?
Will do that next, thought if the sniff (liquid remained blue after 2 tests) and oil tests (absolutely no UV) gave me something to go on I wouldn’t need to bother, but seems I need to delve deeper….any suggestions on the heater matrix? Though carpets are bone dry!.
It appears your headgasket is ok then ( For now ) as Grrr suggested try it again after a good long run to be 100% sure albeit as you mentioned it is leaking from somewhere. If it were burning coolant i think you would be able to smell it too. Are you losing large amounts fast or just a small amount over a period of time?? the latter would suggest something very small. Check all your core plugs on the block for signs of weeping albeit i bet you have done all the visual stuff already buddy.
Gave it some welly and it’s bad news the dipstick is glowing orange but also seems to be a leak on the two pipes just behind the top of the radiator as there seems to be a fair bit of UV glowing there as well.Plugs are the next port of call..
If it isn't burning it then she's leaking it..
Liner issues dump coolant in to the sump and in most cases punches up through the headgasket too if you had such an issue it would be very apparent,
A pressure test is next IMO.
They can leak coolant from a variety of places,
1) split expansion tank
2) Front cover gasket
3) Waterpump
4) Valley gasket
5) Core plugs
6) Radiator
7) heater matrix
Is your carpet dry I wonder....
Meant to ask, I know dropped liners are one of the problems with the Thor but was their an average mileage when this problem developed?
Do you have the dropped liner tap\knock?
I have a rapid ‘clicking noise’ could that be it?
May he something as simple as the valley gasket.
Does it alter when you change revs?
Giz 5, I’ll check,
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