More information might help zero in on any possible issue here.
What was the temperature?
What were the temps of the other 3 engines?
What was the situation? Pre-flight, in flight?, poet-flight?
What was/is the states/condition of your engines in the MH?
I can't recall the spread of engine temps I normally see and I am away from
my sim for a couple more weeks so I can't check.
Remember, with Accu-Sim 'normal' is a moving target
The engines will
'age', fluids get used and leaks develop. It could be that what you are
seeing, or saw, is a result of a maintenance issue.