Enthusiastman
Well-Known Member
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.
The bloke I first spoke to seems absolutely certain it’s the liners based on the fact pressure remains in the expansion tank after it has stood for two or three days.
Enthusiastman
Well-Known Member
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?
Going to send for a pressure tester but no supplier has got back to me to confirm that their kit will fit my 38?
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?
Give it a hundred miles or so then try again. Not that I want you to find a problem but just to be sure. If you see it in the oil then it must be getting across somehow. I think you said no hydrocarbons detected in the coolant? Sounds a bit like it might be OK and something else is causing it. @Henry_b might have an idea. Did you check the plugs?
Henry_b
Think outside, no box required.
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....
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....
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!.
Enthusiastman
Well-Known Member
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.
Its a mystery for sure but if you have NOT looked at the heater matrix core YET in detail then just for peace of mind i would swap it out for that new type Audi one ive read about on here where once fitted you never have O ring issues again. Its worth a punt i suppose same as water pump and valley gasket if your in that area but like the old saying, " if it aint broke " leave it alone. LOL.
Good luck
The good news is that now the UV dye is in it should be easier to spot the leak if it is somewhere hot. Does yours have the leaking throttle body?
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....
Redone sniff test that’s still negative.
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?
Cheers.
tomcat59alan
Well-Known Member
Do you have the dropped liner tap\knock?
I have a rapid ‘clicking noise’ could that be it?
tomcat59alan
Well-Known Member
May he something as simple as the valley gasket.
tomcat59alan
Well-Known Member
Does it alter when you change revs?
Giz 5, I’ll check,
RangeRoller dt
Well-Sprung Member
Like a plinking sound a liner
