Damn.
So what's next besides replacing the head gasket?

 

A new engine,... the minimum you need to do is a gas test on your radiator, to see if your head gasket is gone, and compression test on all the cylinders, to see which part or parts have gone,

 

Depends how much you want to invest in this vehicle. New head gaskets (and associated cleaning and replacement of small parts like doing the the purge control valve mod) will run you at least $500 if you do it yourself. At that point you could have an engine that runs reliably, and you could then follow up by addressing all the other issues. Who knows how much it will cost if you find yourself another mechanic and they keep compounding the head gasket job, trying to fix everything they find.

 

While doing the HG go ahead and do the entire cooling system (radiator included), idler pulleys, water pump and the front crank seal (that's the usual oil leaking culprit that I've found in both of my discos). Those aren't huge money items but really will help with the peace of mind and forgo any issues down the road. None of these jobs are that difficult and it's real nice not having the radiator in the way while leaning over the bay to do the HG job.

 

So right now I don't have the disposable income to do the HG but honestly, I really do NOT know if it's actually the head gasket. One of the biggest signs is milky oil, right? That's not the case for my D2 at all... Is there any sort of other thing that can cause white smoke like that?

 

Milky oil is only one possible symptom of a bad head gasket. If you don't have milky oil, it doesn't necessarily mean that your head gaskets are okay.

 

@gleepglorp the problem with head gasket leaks is they have a lot of symptoms but not everyone is the same. When mine went all I had was a bit over of over pressure, just enough to blow coolant out of the overflow. But it was very small crack.

MIlky oil is one sign but then you will generally get all the others because you have a major failure.

The only way you get constant white smoke is moisture in the exhaust and it can only get there from cylinders from a head gasket leak.

Technically a cracked block could do it but that is pretty unlikely that tends highly over pressure the cooling system

 

If that video is from a cold start up...normally...you won't get a slipped liner noise until it has completely warmed up, maybe after the fifteen minute mark. To me, and your video isn't the best, but it sounds like a low oil pressure related issue or exhaust leak. The oil light flicking, as it is just about too stall, would be somewhat normal. If it stumbling enough to stall, the oil pump wouldn't be turning fast enough to create pressure...so light flickers. Now, if the light is also flickering at idle, 700 rpm's...then you may have an oil pump issue. Also, does the ticking noise diminish...after warming up. This would be more in line with an exhaust leak.

The white smoke looks anti-freeze related, unless you live in a cold climate. Here, the high's have been in the low 20's...so this would be normal to see all day. But, if you live in a warmer climate...this would most certainly be anti-freeze related...especially, after four or five minutes of run time.

Does the exhaust smell sweet? This would suggest anti-freeze issue also.

Me, l'd not replace 02's until l had anti-freeze situation figures out...since they will just be destroyed by the influence of anti-freeze, if a head gasket is leaking. Get a bore scope and look in each cylinder, if you find a super clean piston, one with no carbon build up at all...could be from anti-freeze. If cylinders 1,2,7 or 8 are steam cleaned to perfection...could be head gasket...if cylinders 3,4,5 or 6 are super clean...most-likely...slipped liner or cracked block...since those cylinders don't have coolant passages into the head near by.

Good luck.

 

Thanks for the info.... guess i'll have to get HG replaced sometime soon. $2000 job?

what about HG sealer for the time being? anyone have good luck with that?

 

Head gasket sealants only cause more trouble down the road. Don't do it.
I have no idea how much a mechanic would charge to do a head gasket job. I'd get a second opinion from someone who knows Land Rovers before pulling the trigger on it though.