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Discussion Starter #21
When I bought my car (2010 5.0 NA) it had similar, but not identical, problems with overheating. Or rather erronous overheating indication. After driving for 20 minutes or so, the orange overheating warning was shown, followed a minute later or so by red. The car acted like it had overheated, immediately on red warning the air condition was turned off (which once caused me to nearly crash on the motorway when the windscreen fogged up in three seconds or so :eek: ) , and cooling fans ran on high speed until several minutes after stopping the engine. However, I could not see any evidence of actual overheating.

A lot of things were attempted by both the dealer where I bought the car and the licensed Jaguar workshop, including new thermostat, new engine coolant temperature sensor, troubleshooting a lot of wiring and I don't know what else. What cured it was when they replaced a temperature sensor - I don't know what this sensor measured - that required taking out the gear box to be able to access this sensor (!).
Thanks for the info.

I've seen mention of this secondary temperature sensor elsewhere online and fear this may be what needs changing.

I'll see if I can find any further information about it - then discuss it with my local Jaguar specialist.

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Discussion Starter #22
After reflashing a few related modules - the cooling fan now seems to work as designed but it didn't solve the overheating problem.

After a bit of investigation - the radiator fins appeared to be blocked... something I should have looked at previously considering the car has now done 233,000 miles.

Since cleaning the radiator, intercooler and condenser - the coolant gets to 80c and stays there.

I'm hoping this problem is now solved!


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I have only ever seen a radiator blocked like that once before - and that was on a tractor!
 

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Discussion Starter #24
I drove around with the undertray missing for several months - that probably didn't help... I guess it picked up dirt from underneath the car.

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Wow! 233,000 miles! That's impressive.
Mind you, mine was still running smoothly and sweetly right up to the moment it was so cruelly taken from me at 194,000. That was a 3-litre V6 diesel.
 

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Discussion Starter #27
I wasn't originally planning on keeping it so long... but I'm still nowhere near bored of driving it.

It cost me a fair bit last summer when most of the fuel system needed replacing due to a failed high pressure pump - but it's a risk you take when driving a car that's - shall we say... well run in.

It's still a lovely looking thing.


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I wasn't originally planning on keeping it so long... but I'm still nowhere near bored of driving it.

It cost me a fair bit last summer when most of the fuel system needed replacing due to a failed high pressure pump - but it's a risk you take when driving a car that's - shall we say... well run in.

It's still a lovely looking thing.


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Looks very nice. I guess the repair cost wasn’t anything near the annual depreciation of a brand new one sitting in the garage👍🏻
 

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Discussion Starter #29
Looks very nice. I guess the repair cost wasn’t anything near the annual depreciation of a brand new one sitting in the garage
Thank you - I'm hopeful it'll be some time before I'm presented with another bill like that though!

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