Mark Piercy said:
Only poorly maintained diesels die of gasket failure and cracked noggins... 😭
Click to expand...

I don't think so. That M51 head is its weak point. That's why later models pull in the aircon fans as well. That's on top of the Land Rover rad which is a thicker core than the aftermarket ones. Most of the time it is fine but work it hard all the time and that head cracks, especially if you put a tuning box on it to throw more fuel in.
 
Grrrrrr said:
Not convinced my viscous is as efficient as it should be. Or maybe the radiator. Although the needle doesn't move my Engine Guard informs me the head temperature is creeping up over 95C on long steep hills.
Click to expand...
That is perfectly normal, the max operating temperature is 105C.
 
Grrrrrr said:
I don't think so. That M51 head is its weak point. That's why later models pull in the aircon fans as well. That's on top of the Land Rover rad which is a thicker core than the aftermarket ones. Most of the time it is fine but work it hard all the time and that head cracks, especially if you put a tuning box on it to throw more fuel in.
Click to expand...
The aircon fans on later models kick in from the third sensor at about 110C
 
Datatek said:
That is perfectly normal, the max operating temperature is 105C.
Click to expand...
from my experience with the viscous on the v8.. when it started to fail, the average running temp while driving clicked up a degree or 2. swapped the viscous and it dropped back down again
 
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