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I agree that it's normal for the temp needle to climb after you shut it off, because the coolant is no longer circulating and the engine block is saturated with heat, so the coolant in the block has no choice but to absorb it. Many years ago I had a Pontiac Firebird, which would not even turn over if you tried to restart it when hot. I think it was due to the pistons & rings expanding after shutting it off. You had to wait at least 15-20 minutes for things to cool down before it would crank. Not a very good situation in S. Texas.
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