Hey guys, just a quick question.
(03 Disco 2, 74,000 miles)
just put back my radiator, had it cleaned out.
New Thermo, new water pump, new hoses.

My question: Running temp is fine (according to the idiot gauge on dash) parked or on the highway. But when I turn the truck off after having been on for a good while, if i immediately go to turn her back on the gauge needle will go to 3/4 and then slowly come back down to 1/2 way. When i open up the hood the engine seems real hot. Can't hold the hood open with my hand for too long it's so hot. And the main water hoses coming from the T-stat and Radiator are rock hard. Lot of pressure in those hoses. Not when she's running though only when i turn her off. Should i be worried about this since the gauge reads 1/2 way when shes running? Just seems strange to me the pressure builds up when i turn her off..
thanks for any help you can offer.
Rob

 

When you shut it off all of the coolant stops where it is and the heat builds up until it eventually cools back off.
The engine is all aluminum, aluminum is great at displacing heat so that is why your underhood temps seem so high.
No water pump to move the coolant no cooling is going to happen.

 

Thank You Sir, that's all I needed to know.

 

Lets go a step further with this, do you know if your electric cooling fan is working when you are driving? Do you have a scanner so you can actually check the engine temp while driving and when off?

 

I was wondering about that issue as well, becuase it would seem that rock hard hoses would mean pretty warm. If coolant is 212F just after engine off, AND air under hood is hot, fan should come on in under 20 seconds per RAVE:


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