WHO ? mentioned supermarket cheap antifreeze !!

I use only the decent stuff, like you say £2k worth of engine !!


And who do you think makes the supermarket stuff.

I can buy 5 ltrs of OAT for 8.95euros from Carrefour, & have use it in a number of TD5's with no ill-effects whatsoever. If it's up to spec how can there be any harm?

I would be changing coolant every 2 yrs irrespective of what goes in because I want to be able to flush out the engine rad and heater to check on their condition.
 
Depends . . . on LR's with an ECU, it will be monitoring the air/fuel mix ratio and also reducing the amount of fuel to attempt compensate for the reducing 'density of air'

The actual amount of Oxygen in air ALWAYS remains proportionally the same at approx 21% . . it's the atmospheric pressure which drops, this is not normally a problem below about 8,000ft, above that altitude and you would suffering from Altitude sickness . . a blinding headache initially, which would make driving difficult !!!

Last year in the French Alps, I drove my Disco up to an altitude of just over 2,000 metres (6,550ft) and was also towing me van, and didn't really notice a loss of performance . . . so the ECU etc was obviously doing a good job !!!

An engine with a turbocharger compensates for high altitude, it turns faster due to the lower atmospheric pressure, that's why you didn't notice any loss of performance. The ECU will have some effect however in keeping the smoke level correct.

OldDiscoMan
 
Getting back to the cause, coolant leak like this is probably either a small hidden rad leak or, on this engine, a cracked head. If it's just the HG, then it is likely to get worse quickly. Cracked head could go on for months getting slowly worse (mine did). If it's the HG or the head itself you should eventually get steam coming out of the exhaust when you rev a warm engine.
Unfortunately cracked or porous head is quite common on this engine.
 

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