Cooling system

Asked by Aug 19, 2017 at 11:33 PM about the 1999 Mercury Grand Marquis 4 Dr LS Sedan

Question type: Maintenance & Repair

Car turns off in Drive In
Reverse but not neutral the
car overheats and loses
power if temperature
outside is more than 80
degrees. If AC is turned on
even when the fan is on it's
still overheats the fan does
not turn on when the car is
turned off it doesn't also
turn on by itself.
.,, so for what I did to the
car the thermostat flushed
the hole coolant system.
Change the thermostat
Is probably not related but
got a brand new alternator
I don't know what to do
anymore except buy new
radiator or buy an internal
thermostat for the gauge
that is also broken I give up
on the car it's no longer a
fun car to drive it has hiring
180,000 on it. Idk
Wethersfield to sell it for
700 bucks or buy brand
new engine. And make it
into a performance car. The
car looks brand new from
outside please need

2 Answers


Well the a/c puts more strain on a engine anyway. But if it has electric fans make sure they work. Before replacing anything else if fans work I would do exhaust in cooling system check and a compression test on all cylinders to confirm head gaskets are fine.


Cars should only be able to turn the key off in Park ..As far as your Overheating ,your radiator fan should always be working no matter what ..With 180,000 miles it doesn't matter what the outside looks like ,inside parts are wearing out ,rusting .. Say bye and move on ..

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