Question about 1996 Mercury Grand Marquis
I will assume that you are speaking of the thermostat when you say "valve".
In that case removing the thermostat can cause boil over in long run conditions in elevated temperatures as it has no way to stop or divert the coolant flow to cool the coolant an reintroduce it back to the cooling system. Also unless you plan to run the car longer than 45 minutes before you drive; your windshield defogger/defroster will not work enough to clear the window on rainy days.
50% to 60% as you describe; on the temp indicator I would consider normal operation.
~ Hope this was of help and answered your questions
Posted on May 30, 2009
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Posted on Jan 02, 2017
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