Question about 1996 Mercury Grand Marquis
My 1986 grand marquis seems to overheat after you run it down the highway for a while. The radiator was overflowing into the plastic tank which was squirting water out too. It doesn't seem to have a whoal lot of pick up and the engine started cutting out. I'm trying to sell it, and don't know where to start on fixing it. also, it's been sitting for 8 years.
Sounds like the thermostat is stuck closed.
If the car is overheating, they will also hurt perfomance.
But after sitting 8 yrs, it's hard to say what else might be wrong.
Was it just sitting, and you threw some gas in it to get it running? Or did you go through the car first to do some maintenance? Like an oil change, flush the gast tank and carb and put in all fresh. Change the fuel filter? and the list goes on. A car sitting that long can develope some problems just from sitting. If you could list what you have and haven't done to the car before this would help.
Posted on Aug 11, 2008
Any car sitting that long is going to have some issues. It could be several things. The thermostat could be stuck closed. The radiator could be stopped up. The fan clutch could be inoperative. The waterpump impellar could be deteriorated to the point that it will not circulate coolant. The worst would be that a head gasket could be bad and causing to overheat and misfire. The first thing to do is replace the thermostat and purge any air from the system. Use water and not coolant to verify the repair. If this solves your issue you can drain the water and fill with proper amount of coolant. I must recommend checking for white cloudy smoke from the tailpipe as it is a sure fire sign of a blown headgasket.
Posted on Aug 11, 2008
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Sep 08, 2011 | 1998 Mercury Grand Marquis
Hello and welcome to FixYa!
If you have overheating problem, it can lead to multiple
issues. You may be running on low coolant that's why the vehicle overheats. If
that's the case, please add coolant and make sure that it sits on the right
level, too much coolant can cause overheating too for coolant will overflow.
The vehicle may have a faulty or worn out radiator blower
motor that's why it overheats. If that's the case then you will need a blower
motor replacement to resolve the issue.
If the radiator is clogged with dirt and rusts this issue
occurs too. The coolant doesn't flow normally on the cooling system if it's
clogged. If that's the case, I strongly suggest that you have the radiator
flushed to drain out dirt and rusts. If you think that the radiator served you
enough then it's better to have it replaced.
Please do check the radiator hoses, If you have worn out
hoses it can cause coolant leakage which can result to overheating. A tiny hole
is good enough for the vehicle to overheat.
A faulty thermostat sensor can cause the issue too. If you
have worn out thermostat, the fan may not trigger that's why the fan won't work
when under stressed conditions. A blown radiator blower fuse can cause this
issue too so I suggest that you check the radiator blower fuse and replace it
Hope you find this information helpful enough and thank you for using FixYa! Have a good one!
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